Trouble retrieving location data while using the nrf9151

I'm developing a small IoT device that needs to retrieve and transmit its location upon pressing a button. While testing the modem using AT commands, I can consistently retrieve location data in about 5 minutes. However, when implementing location tracking in firmware, following Lesson 6 of the Cellular Fundamentals course as a framework, the modem struggles to establish a connection with satellites and fails to get a fix, even after extended wait times.

I've closely replicated the Lesson 6 code, yet the issue persists. Following the course's advice, I’ve printed satellite connection information, confirming that my device detects multiple satellites, but the signal strength is insufficient to obtain a fix. Given that the AT commands successfully retrieve location data, but the firmware implementation does not, I’m wondering what might be missing in my approach.

Are there additional considerations I should account for when integrating location tracking into firmware? Any insights into why the modem behaves differently between direct AT commands and firmware execution would be greatly appreciated.

This is a screenshot from my devices outputted satellite connection data.

  • Hi,

    So you are seeing this with the default code as well? You can find the solutions here as well, just to make sure nothing is missed. Are you using a DK for this, or a custom board? If the latter, are you seeing the same issue on a DK as well?

    Regards,

    Elfving

  • Hi,

    I'm using a DK for this testing, and I'm having the same issues with the code in the lesson 6 solution.

    Thanks,

    Hunter

  • Hi Hunter,

    Did you perform all the tests from the same location? Please note that GPS requires outdoor conditions with a clear view of the sky to achieve a fast Time to First Fix (TTFF).

    I did a quick test by connecting a GPS antenna on the roof of our office building. Below are the log and firmware I used for reference.

    The firmware was built with NCS v3.0.1 using cell-fund/l6/l6_e1_sol sample from the main branch NordicDeveloperAcademy/cell-fund. My nRF9151 DK is already programmed with the latest modem firmware (MFW) version 2.0.2.


    *** Booting nRF Connect SDK v3.0.1-9eb5615da66b ***
    *** Using Zephyr OS v4.0.99-77f865b8f8d0 ***
    [00:00:00.297,973] <inf> Lesson6_Exercise1: Initializing modem library
    [00:00:00.558,288] <inf> Lesson6_Exercise1: Starting GNSS
    [00:00:00.584,228] <inf> Lesson6_Exercise1: Searching...
    [00:00:00.584,259] <inf> Lesson6_Exercise1: Number of current satellites: 0
    [00:00:01.592,651] <inf> Lesson6_Exercise1: Searching...
    [00:00:01.592,681] <inf> Lesson6_Exercise1: Number of current satellites: 0
    [00:00:02.594,543] <inf> Lesson6_Exercise1: Searching...
    [00:00:02.594,543] <inf> Lesson6_Exercise1: sv: 27, cn0: 500, signal: 1
    [00:00:02.594,573] <inf> Lesson6_Exercise1: sv: 26, cn0: 440, signal: 1
    [00:00:02.594,573] <inf> Lesson6_Exercise1: sv: 23, cn0: 426, signal: 1
    [00:00:02.594,604] <inf> Lesson6_Exercise1: sv: 18, cn0: 480, signal: 1
    [00:00:02.594,604] <inf> Lesson6_Exercise1: sv: 16, cn0: 490, signal: 1
    [00:00:02.594,635] <inf> Lesson6_Exercise1: sv: 15, cn0: 450, signal: 1
    [00:00:02.594,635] <inf> Lesson6_Exercise1: sv: 10, cn0: 440, signal: 1
    [00:00:02.594,665] <inf> Lesson6_Exercise1: sv: 5, cn0: 420, signal: 1
    [00:00:02.594,665] <inf> Lesson6_Exercise1: sv: 7, cn0: 426, signal: 1
    [00:00:02.594,696] <inf> Lesson6_Exercise1: sv: 13, cn0: 426, signal: 1
    [00:00:02.594,696] <inf> Lesson6_Exercise1: Number of current satellites: 10
    [00:00:03.594,451] <inf> Lesson6_Exercise1: Searching...
    [00:00:03.594,512] <inf> Lesson6_Exercise1: sv: 27, cn0: 500, signal: 1
    [00:00:03.594,512] <inf> Lesson6_Exercise1: sv: 26, cn0: 440, signal: 1
    [00:00:03.594,543] <inf> Lesson6_Exercise1: sv: 23, cn0: 426, signal: 1
    [00:00:03.594,543] <inf> Lesson6_Exercise1: sv: 18, cn0: 480, signal: 1
    [00:00:03.594,573] <inf> Lesson6_Exercise1: sv: 16, cn0: 490, signal: 1
    [00:00:03.594,573] <inf> Lesson6_Exercise1: sv: 15, cn0: 450, signal: 1
    [00:00:03.594,604] <inf> Lesson6_Exercise1: sv: 10, cn0: 440, signal: 1
    [00:00:03.594,604] <inf> Lesson6_Exercise1: sv: 5, cn0: 420, signal: 1
    [00:00:03.594,635] <inf> Lesson6_Exercise1: sv: 7, cn0: 426, signal: 1
    [00:00:03.594,665] <inf> Lesson6_Exercise1: sv: 13, cn0: 426, signal: 1
    [00:00:03.594,665] <inf> Lesson6_Exercise1: sv: 196, cn0: 413, signal: 3
    [00:00:03.594,696] <inf> Lesson6_Exercise1: sv: 8, cn0: 437, signal: 1
    [00:00:03.594,696] <inf> Lesson6_Exercise1: Number of current satellites: 12
    [00:00:04.596,496] <inf> Lesson6_Exercise1: Searching...
    [00:00:04.596,557] <inf> Lesson6_Exercise1: sv: 27, cn0: 482, signal: 1
    [00:00:04.596,557] <inf> Lesson6_Exercise1: sv: 26, cn0: 421, signal: 1
    [00:00:04.596,588] <inf> Lesson6_Exercise1: sv: 23, cn0: 434, signal: 1
    [00:00:04.596,588] <inf> Lesson6_Exercise1: sv: 18, cn0: 460, signal: 1
    [00:00:04.596,618] <inf> Lesson6_Exercise1: sv: 16, cn0: 471, signal: 1
    [00:00:04.596,618] <inf> Lesson6_Exercise1: sv: 15, cn0: 428, signal: 1
    [00:00:04.596,649] <inf> Lesson6_Exercise1: sv: 10, cn0: 425, signal: 1
    [00:00:04.596,649] <inf> Lesson6_Exercise1: sv: 5, cn0: 397, signal: 1
    [00:00:04.596,679] <inf> Lesson6_Exercise1: sv: 7, cn0: 408, signal: 1
    [00:00:04.596,710] <inf> Lesson6_Exercise1: sv: 13, cn0: 402, signal: 1
    [00:00:04.596,710] <inf> Lesson6_Exercise1: sv: 196, cn0: 376, signal: 3
    [00:00:04.596,740] <inf> Lesson6_Exercise1: sv: 8, cn0: 437, signal: 1
    [00:00:04.596,740] <inf> Lesson6_Exercise1: Number of current satellites: 12
    [00:00:05.596,405] <inf> Lesson6_Exercise1: Searching...
    [00:00:05.596,435] <inf> Lesson6_Exercise1: sv: 27, cn0: 478, signal: 1
    [00:00:05.596,466] <inf> Lesson6_Exercise1: sv: 26, cn0: 414, signal: 1
    [00:00:05.596,466] <inf> Lesson6_Exercise1: sv: 23, cn0: 438, signal: 1
    [00:00:05.596,496] <inf> Lesson6_Exercise1: sv: 18, cn0: 452, signal: 1
    [00:00:05.596,496] <inf> Lesson6_Exercise1: sv: 16, cn0: 464, signal: 1
    [00:00:05.596,527] <inf> Lesson6_Exercise1: sv: 15, cn0: 419, signal: 1
    [00:00:05.596,527] <inf> Lesson6_Exercise1: sv: 10, cn0: 418, signal: 1
    [00:00:05.596,557] <inf> Lesson6_Exercise1: sv: 5, cn0: 385, signal: 1
    [00:00:05.596,557] <inf> Lesson6_Exercise1: sv: 7, cn0: 400, signal: 1
    [00:00:05.596,618] <inf> Lesson6_Exercise1: sv: 13, cn0: 392, signal: 1
    [00:00:05.596,618] <inf> Lesson6_Exercise1: sv: 196, cn0: 362, signal: 3
    [00:00:05.596,649] <inf> Lesson6_Exercise1: sv: 8, cn0: 414, signal: 1
    [00:00:05.596,649] <inf> Lesson6_Exercise1: Number of current satellites: 12
    [00:00:06.596,649] <inf> Lesson6_Exercise1: Searching...
    [00:00:06.596,679] <inf> Lesson6_Exercise1: sv: 27, cn0: 478, signal: 1
    [00:00:06.596,710] <inf> Lesson6_Exercise1: sv: 26, cn0: 411, signal: 1
    [00:00:06.596,710] <inf> Lesson6_Exercise1: sv: 23, cn0: 445, signal: 1
    [00:00:06.596,740] <inf> Lesson6_Exercise1: sv: 18, cn0: 447, signal: 1
    [00:00:06.596,740] <inf> Lesson6_Exercise1: sv: 16, cn0: 461, signal: 1
    [00:00:06.596,771] <inf> Lesson6_Exercise1: sv: 15, cn0: 416, signal: 1
    [00:00:06.596,771] <inf> Lesson6_Exercise1: sv: 10, cn0: 417, signal: 1
    [00:00:06.596,801] <inf> Lesson6_Exercise1: sv: 5, cn0: 378, signal: 1
    [00:00:06.596,801] <inf> Lesson6_Exercise1: sv: 7, cn0: 396, signal: 1
    [00:00:06.596,862] <inf> Lesson6_Exercise1: sv: 13, cn0: 385, signal: 1
    [00:00:06.596,862] <inf> Lesson6_Exercise1: sv: 196, cn0: 355, signal: 3
    [00:00:06.596,893] <inf> Lesson6_Exercise1: sv: 8, cn0: 402, signal: 1
    [00:00:06.596,893] <inf> Lesson6_Exercise1: Number of current satellites: 12
    [00:00:07.596,496] <inf> Lesson6_Exercise1: Searching...
    [00:00:07.596,527] <inf> Lesson6_Exercise1: sv: 27, cn0: 480, signal: 1
    [00:00:07.596,557] <inf> Lesson6_Exercise1: sv: 26, cn0: 410, signal: 1
    [00:00:07.596,557] <inf> Lesson6_Exercise1: sv: 23, cn0: 447, signal: 1
    [00:00:07.596,588] <inf> Lesson6_Exercise1: sv: 18, cn0: 445, signal: 1
    [00:00:07.596,588] <inf> Lesson6_Exercise1: sv: 16, cn0: 456, signal: 1
    [00:00:07.596,618] <inf> Lesson6_Exercise1: sv: 15, cn0: 413, signal: 1
    [00:00:07.596,618] <inf> Lesson6_Exercise1: sv: 10, cn0: 415, signal: 1
    [00:00:07.596,649] <inf> Lesson6_Exercise1: sv: 5, cn0: 376, signal: 1
    [00:00:07.596,649] <inf> Lesson6_Exercise1: sv: 7, cn0: 392, signal: 1
    [00:00:07.596,679] <inf> Lesson6_Exercise1: sv: 13, cn0: 382, signal: 1
    [00:00:07.596,710] <inf> Lesson6_Exercise1: sv: 196, cn0: 352, signal: 3
    [00:00:07.596,710] <inf> Lesson6_Exercise1: sv: 8, cn0: 394, signal: 1
    [00:00:07.596,740] <inf> Lesson6_Exercise1: Number of current satellites: 12
    [00:00:08.596,527] <inf> Lesson6_Exercise1: Searching...
    [00:00:08.596,557] <inf> Lesson6_Exercise1: sv: 27, cn0: 481, signal: 1
    [00:00:08.596,588] <inf> Lesson6_Exercise1: sv: 26, cn0: 409, signal: 1
    [00:00:08.596,588] <inf> Lesson6_Exercise1: sv: 23, cn0: 449, signal: 1
    [00:00:08.596,618] <inf> Lesson6_Exercise1: sv: 18, cn0: 443, signal: 1
    [00:00:08.596,618] <inf> Lesson6_Exercise1: sv: 16, cn0: 456, signal: 1
    [00:00:08.596,649] <inf> Lesson6_Exercise1: sv: 15, cn0: 411, signal: 1
    [00:00:08.596,649] <inf> Lesson6_Exercise1: sv: 10, cn0: 417, signal: 1
    [00:00:08.596,679] <inf> Lesson6_Exercise1: sv: 5, cn0: 376, signal: 1
    [00:00:08.596,679] <inf> Lesson6_Exercise1: sv: 7, cn0: 389, signal: 1
    [00:00:08.596,710] <inf> Lesson6_Exercise1: sv: 13, cn0: 381, signal: 1
    [00:00:08.596,740] <inf> Lesson6_Exercise1: sv: 196, cn0: 351, signal: 3
    [00:00:08.596,740] <inf> Lesson6_Exercise1: sv: 8, cn0: 388, signal: 1
    [00:00:08.596,771] <inf> Lesson6_Exercise1: Number of current satellites: 12
    [00:00:09.596,649] <inf> Lesson6_Exercise1: Searching...
    [00:00:09.596,710] <inf> Lesson6_Exercise1: sv: 27, cn0: 479, signal: 1
    [00:00:09.596,710] <inf> Lesson6_Exercise1: sv: 26, cn0: 409, signal: 1
    [00:00:09.596,740] <inf> Lesson6_Exercise1: sv: 23, cn0: 449, signal: 1
    [00:00:09.596,740] <inf> Lesson6_Exercise1: sv: 18, cn0: 441, signal: 1
    [00:00:09.596,771] <inf> Lesson6_Exercise1: sv: 16, cn0: 456, signal: 1
    [00:00:09.596,771] <inf> Lesson6_Exercise1: sv: 15, cn0: 411, signal: 1
    [00:00:09.596,801] <inf> Lesson6_Exercise1: sv: 10, cn0: 418, signal: 1
    [00:00:09.596,801] <inf> Lesson6_Exercise1: sv: 5, cn0: 377, signal: 1
    [00:00:09.596,832] <inf> Lesson6_Exercise1: sv: 7, cn0: 386, signal: 1
    [00:00:09.596,862] <inf> Lesson6_Exercise1: sv: 13, cn0: 381, signal: 1
    [00:00:09.596,862] <inf> Lesson6_Exercise1: sv: 196, cn0: 348, signal: 3
    [00:00:09.596,893] <inf> Lesson6_Exercise1: sv: 8, cn0: 387, signal: 1
    [00:00:09.596,893] <inf> Lesson6_Exercise1: Number of current satellites: 12
    [00:00:10.598,632] <inf> Lesson6_Exercise1: Searching...
    [00:00:10.598,663] <inf> Lesson6_Exercise1: sv: 27, cn0: 479, signal: 1
    [00:00:10.598,693] <inf> Lesson6_Exercise1: sv: 26, cn0: 407, signal: 1
    [00:00:10.598,693] <inf> Lesson6_Exercise1: sv: 23, cn0: 450, signal: 1
    [00:00:10.598,724] <inf> Lesson6_Exercise1: sv: 18, cn0: 440, signal: 1
    [00:00:10.598,724] <inf> Lesson6_Exercise1: sv: 16, cn0: 456, signal: 1
    [00:00:10.598,754] <inf> Lesson6_Exercise1: sv: 15, cn0: 412, signal: 1
    [00:00:10.598,754] <inf> Lesson6_Exercise1: sv: 10, cn0: 418, signal: 1
    [00:00:10.598,785] <inf> Lesson6_Exercise1: sv: 5, cn0: 377, signal: 1
    [00:00:10.598,785] <inf> Lesson6_Exercise1: sv: 7, cn0: 389, signal: 1
    [00:00:10.598,846] <inf> Lesson6_Exercise1: sv: 13, cn0: 384, signal: 1
    [00:00:10.598,846] <inf> Lesson6_Exercise1: sv: 196, cn0: 347, signal: 3
    [00:00:10.598,876] <inf> Lesson6_Exercise1: sv: 8, cn0: 388, signal: 1
    [00:00:10.598,876] <inf> Lesson6_Exercise1: Number of current satellites: 12
    [00:00:11.596,923] <inf> Lesson6_Exercise1: Searching...
    [00:00:11.596,984] <inf> Lesson6_Exercise1: sv: 27, cn0: 479, signal: 1
    [00:00:11.596,984] <inf> Lesson6_Exercise1: sv: 26, cn0: 406, signal: 1
    [00:00:11.597,015] <inf> Lesson6_Exercise1: sv: 23, cn0: 451, signal: 1
    [00:00:11.597,015] <inf> Lesson6_Exercise1: sv: 18, cn0: 442, signal: 1
    [00:00:11.597,045] <inf> Lesson6_Exercise1: sv: 16, cn0: 459, signal: 1
    [00:00:11.597,045] <inf> Lesson6_Exercise1: sv: 15, cn0: 414, signal: 1
    [00:00:11.597,076] <inf> Lesson6_Exercise1: sv: 10, cn0: 417, signal: 1
    [00:00:11.597,076] <inf> Lesson6_Exercise1: sv: 5, cn0: 377, signal: 1
    [00:00:11.597,106] <inf> Lesson6_Exercise1: sv: 7, cn0: 393, signal: 1
    [00:00:11.597,137] <inf> Lesson6_Exercise1: sv: 13, cn0: 386, signal: 1
    [00:00:11.597,137] <inf> Lesson6_Exercise1: sv: 196, cn0: 348, signal: 3
    [00:00:11.597,167] <inf> Lesson6_Exercise1: sv: 8, cn0: 389, signal: 1
    [00:00:11.597,167] <inf> Lesson6_Exercise1: Number of current satellites: 12
    [00:00:12.597,656] <inf> Lesson6_Exercise1: Searching...
    [00:00:12.597,717] <inf> Lesson6_Exercise1: sv: 27, cn0: 480, signal: 1
    [00:00:12.597,717] <inf> Lesson6_Exercise1: sv: 26, cn0: 408, signal: 1
    [00:00:12.597,747] <inf> Lesson6_Exercise1: sv: 23, cn0: 451, signal: 1
    [00:00:12.597,747] <inf> Lesson6_Exercise1: sv: 18, cn0: 444, signal: 1
    [00:00:12.597,778] <inf> Lesson6_Exercise1: sv: 16, cn0: 462, signal: 1
    [00:00:12.597,778] <inf> Lesson6_Exercise1: sv: 15, cn0: 411, signal: 1
    [00:00:12.597,778] <inf> Lesson6_Exercise1: sv: 10, cn0: 417, signal: 1
    [00:00:12.597,808] <inf> Lesson6_Exercise1: sv: 5, cn0: 378, signal: 1
    [00:00:12.597,808] <inf> Lesson6_Exercise1: sv: 7, cn0: 398, signal: 1
    [00:00:12.597,869] <inf> Lesson6_Exercise1: sv: 13, cn0: 384, signal: 1
    [00:00:12.597,869] <inf> Lesson6_Exercise1: sv: 196, cn0: 347, signal: 3
    [00:00:12.597,900] <inf> Lesson6_Exercise1: sv: 8, cn0: 390, signal: 1
    [00:00:12.597,900] <inf> Lesson6_Exercise1: Number of current satellites: 12
    [00:00:13.597,717] <inf> Lesson6_Exercise1: Searching...
    [00:00:13.597,747] <inf> Lesson6_Exercise1: sv: 27, cn0: 482, signal: 1
    [00:00:13.597,747] <inf> Lesson6_Exercise1: sv: 26, cn0: 408, signal: 1
    [00:00:13.597,778] <inf> Lesson6_Exercise1: sv: 23, cn0: 451, signal: 1
    [00:00:13.597,778] <inf> Lesson6_Exercise1: sv: 18, cn0: 445, signal: 1
    [00:00:13.597,808] <inf> Lesson6_Exercise1: sv: 16, cn0: 463, signal: 1
    [00:00:13.597,808] <inf> Lesson6_Exercise1: sv: 15, cn0: 407, signal: 1
    [00:00:13.597,839] <inf> Lesson6_Exercise1: sv: 10, cn0: 413, signal: 1
    [00:00:13.597,839] <inf> Lesson6_Exercise1: sv: 5, cn0: 378, signal: 1
    [00:00:13.597,869] <inf> Lesson6_Exercise1: sv: 7, cn0: 403, signal: 1
    [00:00:13.597,900] <inf> Lesson6_Exercise1: sv: 13, cn0: 382, signal: 1
    [00:00:13.597,930] <inf> Lesson6_Exercise1: sv: 196, cn0: 345, signal: 3
    [00:00:13.597,930] <inf> Lesson6_Exercise1: sv: 8, cn0: 389, signal: 1
    [00:00:13.597,930] <inf> Lesson6_Exercise1: Number of current satellites: 12
    [00:00:14.597,778] <inf> Lesson6_Exercise1: Searching...
    [00:00:14.597,839] <inf> Lesson6_Exercise1: sv: 27, cn0: 480, signal: 1
    [00:00:14.597,839] <inf> Lesson6_Exercise1: sv: 26, cn0: 408, signal: 1
    [00:00:14.597,869] <inf> Lesson6_Exercise1: sv: 23, cn0: 451, signal: 1
    [00:00:14.597,869] <inf> Lesson6_Exercise1: sv: 18, cn0: 446, signal: 1
    [00:00:14.597,900] <inf> Lesson6_Exercise1: sv: 16, cn0: 464, signal: 1
    [00:00:14.597,900] <inf> Lesson6_Exercise1: sv: 15, cn0: 402, signal: 1
    [00:00:14.597,930] <inf> Lesson6_Exercise1: sv: 10, cn0: 413, signal: 1
    [00:00:14.597,930] <inf> Lesson6_Exercise1: sv: 5, cn0: 378, signal: 1
    [00:00:14.597,961] <inf> Lesson6_Exercise1: sv: 7, cn0: 405, signal: 1
    [00:00:14.597,991] <inf> Lesson6_Exercise1: sv: 13, cn0: 384, signal: 1
    [00:00:14.597,991] <inf> Lesson6_Exercise1: sv: 196, cn0: 344, signal: 3
    [00:00:14.598,022] <inf> Lesson6_Exercise1: sv: 8, cn0: 388, signal: 1
    [00:00:14.598,022] <inf> Lesson6_Exercise1: Number of current satellites: 12
    [00:00:15.597,778] <inf> Lesson6_Exercise1: Searching...
    [00:00:15.597,808] <inf> Lesson6_Exercise1: sv: 27, cn0: 481, signal: 1
    [00:00:15.597,839] <inf> Lesson6_Exercise1: sv: 26, cn0: 412, signal: 1
    [00:00:15.597,839] <inf> Lesson6_Exercise1: sv: 23, cn0: 451, signal: 1
    [00:00:15.597,869] <inf> Lesson6_Exercise1: sv: 18, cn0: 445, signal: 1
    [00:00:15.597,869] <inf> Lesson6_Exercise1: sv: 16, cn0: 464, signal: 1
    [00:00:15.597,900] <inf> Lesson6_Exercise1: sv: 15, cn0: 401, signal: 1
    [00:00:15.597,900] <inf> Lesson6_Exercise1: sv: 10, cn0: 414, signal: 1
    [00:00:15.597,930] <inf> Lesson6_Exercise1: sv: 5, cn0: 375, signal: 1
    [00:00:15.597,930] <inf> Lesson6_Exercise1: sv: 7, cn0: 405, signal: 1
    [00:00:15.597,961] <inf> Lesson6_Exercise1: sv: 13, cn0: 381, signal: 1
    [00:00:15.597,991] <inf> Lesson6_Exercise1: sv: 196, cn0: 345, signal: 3
    [00:00:15.597,991] <inf> Lesson6_Exercise1: sv: 8, cn0: 386, signal: 1
    [00:00:15.598,022] <inf> Lesson6_Exercise1: Number of current satellites: 12
    [00:00:16.597,106] <inf> Lesson6_Exercise1: Searching...
    [00:00:16.597,167] <inf> Lesson6_Exercise1: sv: 27, cn0: 481, signal: 1
    [00:00:16.597,167] <inf> Lesson6_Exercise1: sv: 26, cn0: 413, signal: 1
    [00:00:16.597,198] <inf> Lesson6_Exercise1: sv: 23, cn0: 452, signal: 1
    [00:00:16.597,198] <inf> Lesson6_Exercise1: sv: 18, cn0: 444, signal: 1
    [00:00:16.597,229] <inf> Lesson6_Exercise1: sv: 16, cn0: 461, signal: 1
    [00:00:16.597,229] <inf> Lesson6_Exercise1: sv: 15, cn0: 402, signal: 1
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    [00:00:32.597,839] <inf> Lesson6_Exercise1: sv: 23, cn0: 452, signal: 1
    [00:00:32.597,839] <inf> Lesson6_Exercise1: sv: 18, cn0: 446, signal: 1
    [00:00:32.597,869] <inf> Lesson6_Exercise1: sv: 16, cn0: 457, signal: 1
    [00:00:32.597,869] <inf> Lesson6_Exercise1: sv: 15, cn0: 405, signal: 1
    [00:00:32.597,900] <inf> Lesson6_Exercise1: sv: 10, cn0: 405, signal: 1
    [00:00:32.597,900] <inf> Lesson6_Exercise1: sv: 5, cn0: 373, signal: 1
    [00:00:32.597,930] <inf> Lesson6_Exercise1: sv: 7, cn0: 396, signal: 1
    [00:00:32.597,961] <inf> Lesson6_Exercise1: sv: 13, cn0: 385, signal: 1
    [00:00:32.597,991] <inf> Lesson6_Exercise1: sv: 196, cn0: 351, signal: 3
    [00:00:32.597,991] <inf> Lesson6_Exercise1: sv: 8, cn0: 385, signal: 1
    [00:00:32.597,991] <inf> Lesson6_Exercise1: Number of current satellites: 12
    [00:00:33.228,515] <inf> Lesson6_Exercise1: Searching...
    [00:00:33.228,546] <inf> Lesson6_Exercise1: sv: 27, cn0: 478, signal: 1
    [00:00:33.228,546] <inf> Lesson6_Exercise1: sv: 26, cn0: 416, signal: 1
    [00:00:33.228,576] <inf> Lesson6_Exercise1: sv: 23, cn0: 454, signal: 1
    [00:00:33.228,576] <inf> Lesson6_Exercise1: sv: 18, cn0: 445, signal: 1
    [00:00:33.228,607] <inf> Lesson6_Exercise1: sv: 16, cn0: 461, signal: 1
    [00:00:33.228,607] <inf> Lesson6_Exercise1: sv: 15, cn0: 409, signal: 1
    [00:00:33.228,637] <inf> Lesson6_Exercise1: sv: 10, cn0: 403, signal: 1
    [00:00:33.228,637] <inf> Lesson6_Exercise1: sv: 5, cn0: 374, signal: 1
    [00:00:33.228,668] <inf> Lesson6_Exercise1: sv: 7, cn0: 397, signal: 1
    [00:00:33.228,698] <inf> Lesson6_Exercise1: sv: 13, cn0: 386, signal: 1
    [00:00:33.228,729] <inf> Lesson6_Exercise1: sv: 196, cn0: 350, signal: 3
    [00:00:33.228,729] <inf> Lesson6_Exercise1: sv: 8, cn0: 388, signal: 1
    [00:00:33.228,729] <inf> Lesson6_Exercise1: Number of current satellites: 12
    [00:00:33.228,790] <inf> Lesson6_Exercise1: Latitude:       59.920932
    [00:00:33.228,820] <inf> Lesson6_Exercise1: Longitude:      10.689111
    [00:00:33.228,820] <inf> Lesson6_Exercise1: Altitude:       82.5 m
    [00:00:33.228,851] <inf> Lesson6_Exercise1: Time (UTC):     10:36:30.087
    [00:00:33.228,851] <inf> Lesson6_Exercise1: Time to first fix: 32 s
    [00:00:33.229,827] <inf> Lesson6_Exercise1: GNSS enter sleep after fix

    l6_e1_sol_merged.hex

    Just test it again to see if it make any difference.

    Best regards,

    Charlie

  • I retested the lesson 6 code, ensuring that it was up to date and no modifications were made. It still had not produced a fix after 15 minutes, when the AT commands gave a fix in 2 minutes from the same location at a similar time.


    [00:08:28.781,036] <inf> Lesson6_Exercise1: Searching...
    [00:08:28.781,066] <inf> Lesson6_Exercise1: sv: 31, cn0: 248, signal: 1
    [00:08:28.781,097] <inf> Lesson6_Exercise1: Number of current satellites: 1
    [00:08:29.780,944] <inf> Lesson6_Exercise1: Searching...
    [00:08:29.780,975] <inf> Lesson6_Exercise1: Number of current satellites: 0
    [00:08:30.781,097] <inf> Lesson6_Exercise1: Searching...
    [00:08:30.781,127] <inf> Lesson6_Exercise1: Number of current satellites: 0
    [00:08:31.781,250] <inf> Lesson6_Exercise1: Searching...
    [00:08:31.781,250] <inf> Lesson6_Exercise1: Number of current satellites: 0
    [00:08:32.781,341] <inf> Lesson6_Exercise1: Searching...
    [00:08:32.781,372] <inf> Lesson6_Exercise1: Number of current satellites: 0
    [00:08:33.781,219] <inf> Lesson6_Exercise1: Searching...
    [00:08:33.781,219] <inf> Lesson6_Exercise1: Number of current satellites: 0
    [00:08:34.781,372] <inf> Lesson6_Exercise1: Searching...
    [00:08:34.781,402] <inf> Lesson6_Exercise1: Number of current satellites: 0
    [00:08:35.781,433] <inf> Lesson6_Exercise1: Searching...
    [00:08:35.781,433] <inf> Lesson6_Exercise1: Number of current satellites: 0
    [00:08:36.781,555] <inf> Lesson6_Exercise1: Searching...
    [00:08:36.781,585] <inf> Lesson6_Exercise1: Number of current satellites: 0
    [00:08:37.781,646] <inf> Lesson6_Exercise1: Searching...
    [00:08:37.781,646] <inf> Lesson6_Exercise1: Number of current satellites: 0
    [00:08:38.781,433] <inf> Lesson6_Exercise1: Searching...
    [00:08:38.781,463] <inf> Lesson6_Exercise1: Number of current satellites: 0
    [00:08:39.781,555] <inf> Lesson6_Exercise1: Searching...
    [00:08:39.781,585] <inf> Lesson6_Exercise1: Number of current satellites: 0
    [00:08:40.781,402] <inf> Lesson6_Exercise1: Searching...
    [00:08:40.781,433] <inf> Lesson6_Exercise1: Number of current satellites: 0
    [00:08:41.781,555] <inf> Lesson6_Exercise1: Searching...
    [00:08:41.781,555] <inf> Lesson6_Exercise1: Number of current satellites: 0
    [00:08:42.781,280] <inf> Lesson6_Exercise1: Searching...
    [00:08:42.781,311] <inf> Lesson6_Exercise1: Number of current satellites: 0
    [00:08:43.782,470] <inf> Lesson6_Exercise1: Searching...
    [00:08:43.782,470] <inf> Lesson6_Exercise1: Number of current satellites: 0
    [00:08:44.782,531] <inf> Lesson6_Exercise1: Searching...
    [00:08:44.782,562] <inf> Lesson6_Exercise1: sv: 17, cn0: 255, signal: 1
    [00:08:44.782,562] <inf> Lesson6_Exercise1: sv: 8, cn0: 272, signal: 1
    [00:08:44.782,592] <inf> Lesson6_Exercise1: Number of current satellites: 2
    [00:08:45.781,890] <inf> Lesson6_Exercise1: Searching...
    [00:08:45.781,921] <inf> Lesson6_Exercise1: sv: 17, cn0: 245, signal: 1
    [00:08:45.781,921] <inf> Lesson6_Exercise1: sv: 8, cn0: 251, signal: 1
    [00:08:45.781,921] <inf> Lesson6_Exercise1: Number of current satellites: 2
    [00:08:46.782,073] <inf> Lesson6_Exercise1: Searching...
    [00:08:46.782,104] <inf> Lesson6_Exercise1: sv: 17, cn0: 248, signal: 1
    [00:08:46.782,104] <inf> Lesson6_Exercise1: sv: 8, cn0: 251, signal: 1
    [00:08:46.782,135] <inf> Lesson6_Exercise1: Number of current satellites: 2
    [00:08:47.781,768] <inf> Lesson6_Exercise1: Searching...
    [00:08:47.781,768] <inf> Lesson6_Exercise1: sv: 17, cn0: 247, signal: 1
    [00:08:47.781,799] <inf> Lesson6_Exercise1: sv: 8, cn0: 248, signal: 1
    [00:08:47.781,799] <inf> Lesson6_Exercise1: Number of current satellites: 2
    [00:08:48.781,951] <inf> Lesson6_Exercise1: Searching...
    [00:08:48.781,982] <inf> Lesson6_Exercise1: Number of current satellites: 0
    [00:08:49.781,921] <inf> Lesson6_Exercise1: Searching...
    [00:08:49.781,921] <inf> Lesson6_Exercise1: Number of current satellites: 0
    [00:08:50.781,799] <inf> Lesson6_Exercise1: Searching...
    [00:08:50.781,829] <inf> Lesson6_Exercise1: sv: 5, cn0: 255, signal: 1
    [00:08:50.781,860] <inf> Lesson6_Exercise1: Number of current satellites: 1
    [00:08:51.782,470] <inf> Lesson6_Exercise1: Searching...
    [00:08:51.782,501] <inf> Lesson6_Exercise1: sv: 5, cn0: 249, signal: 1
    [00:08:51.782,501] <inf> Lesson6_Exercise1: Number of current satellites: 1
    [00:08:52.782,226] <inf> Lesson6_Exercise1: Searching...
    [00:08:52.782,257] <inf> Lesson6_Exercise1: sv: 5, cn0: 247, signal: 1
    [00:08:52.782,257] <inf> Lesson6_Exercise1: Number of current satellites: 1
    [00:08:53.782,043] <inf> Lesson6_Exercise1: Searching...
    [00:08:53.782,043] <inf> Lesson6_Exercise1: sv: 5, cn0: 245, signal: 1
    [00:08:53.782,073] <inf> Lesson6_Exercise1: sv: 14, cn0: 252, signal: 1
    [00:08:53.782,073] <inf> Lesson6_Exercise1: Number of current satellites: 2
    [00:08:54.782,073] <inf> Lesson6_Exercise1: Searching...
    [00:08:54.782,104] <inf> Lesson6_Exercise1: sv: 14, cn0: 241, signal: 1
    [00:08:54.782,104] <inf> Lesson6_Exercise1: Number of current satellites: 1
    [00:08:55.782,806] <inf> Lesson6_Exercise1: Searching...
    [00:08:55.782,806] <inf> Lesson6_Exercise1: sv: 14, cn0: 248, signal: 1
    [00:08:55.782,806] <inf> Lesson6_Exercise1: Number of current satellites: 1
    [00:08:56.781,921] <inf> Lesson6_Exercise1: Searching...
    [00:08:56.781,951] <inf> Lesson6_Exercise1: sv: 14, cn0: 248, signal: 1
    [00:08:56.781,951] <inf> Lesson6_Exercise1: Number of current satellites: 1
    [00:08:57.782,104] <inf> Lesson6_Exercise1: Searching...
    [00:08:57.782,104] <inf> Lesson6_Exercise1: Number of current satellites: 0
    [00:08:58.782,196] <inf> Lesson6_Exercise1: Searching...
    [00:08:58.782,226] <inf> Lesson6_Exercise1: Number of current satellites: 0
    [00:08:59.782,348] <inf> Lesson6_Exercise1: Searching...
    [00:08:59.782,348] <inf> Lesson6_Exercise1: Number of current satellites: 0
    [00:09:00.782,409] <inf> Lesson6_Exercise1: Searching...
    [00:09:00.782,440] <inf> Lesson6_Exercise1: sv: 1, cn0: 419, signal: 1
    [00:09:00.782,470] <inf> Lesson6_Exercise1: Number of current satellites: 1
    [00:09:01.782,592] <inf> Lesson6_Exercise1: Searching...
    [00:09:01.782,592] <inf> Lesson6_Exercise1: sv: 1, cn0: 264, signal: 1
    [00:09:01.782,623] <inf> Lesson6_Exercise1: Number of current satellites: 1
    [00:09:02.782,318] <inf> Lesson6_Exercise1: Searching...
    [00:09:02.782,348] <inf> Lesson6_Exercise1: sv: 1, cn0: 247, signal: 1
    [00:09:02.782,348] <inf> Lesson6_Exercise1: Number of current satellites: 1
    [00:09:03.782,318] <inf> Lesson6_Exercise1: Searching...
    [00:09:03.782,348] <inf> Lesson6_Exercise1: sv: 1, cn0: 243, signal: 1
    [00:09:03.782,348] <inf> Lesson6_Exercise1: Number of current satellites: 1
    [00:09:04.782,348] <inf> Lesson6_Exercise1: Searching...
    [00:09:04.782,379] <inf> Lesson6_Exercise1: Number of current satellites: 0
    [00:09:05.782,440] <inf> Lesson6_Exercise1: Searching...
    [00:09:05.782,440] <inf> Lesson6_Exercise1: Number of current satellites: 0
    [00:09:06.782,409] <inf> Lesson6_Exercise1: Searching...
    [00:09:06.782,440] <inf> Lesson6_Exercise1: Number of current satellites: 0
    [00:09:07.781,982] <inf> Lesson6_Exercise1: Searching...
    [00:09:07.782,012] <inf> Lesson6_Exercise1: Number of current satellites: 0
    [00:09:08.782,226] <inf> Lesson6_Exercise1: Searching...
    [00:09:08.782,257] <inf> Lesson6_Exercise1: Number of current satellites: 0
    [00:09:09.782,043] <inf> Lesson6_Exercise1: Searching...
    [00:09:09.782,073] <inf> Lesson6_Exercise1: Number of current satellites: 0
    [00:09:10.782,348] <inf> Lesson6_Exercise1: Searching...
    [00:09:10.782,379] <inf> Lesson6_Exercise1: Number of current satellites: 0
    [00:09:11.782,104] <inf> Lesson6_Exercise1: Searching...
    [00:09:11.782,104] <inf> Lesson6_Exercise1: Number of current satellites: 0
    [00:09:12.782,836] <inf> Lesson6_Exercise1: Searching...
    [00:09:12.782,867] <inf> Lesson6_Exercise1: Number of current satellites: 0
    [00:09:13.783,142] <inf> Lesson6_Exercise1: Searching...
    [00:09:13.783,172] <inf> Lesson6_Exercise1: sv: 1, cn0: 286, signal: 1
    [00:09:13.783,172] <inf> Lesson6_Exercise1: Number of current satellites: 1
    [00:09:14.782,470] <inf> Lesson6_Exercise1: Searching...
    [00:09:14.782,501] <inf> Lesson6_Exercise1: sv: 1, cn0: 250, signal: 1
    [00:09:14.782,501] <inf> Lesson6_Exercise1: Number of current satellites: 1
    [00:09:15.782,653] <inf> Lesson6_Exercise1: Searching...
    [00:09:15.782,684] <inf> Lesson6_Exercise1: sv: 1, cn0: 250, signal: 1
    [00:09:15.782,684] <inf> Lesson6_Exercise1: Number of current satellites: 1
    [00:09:16.782,409] <inf> Lesson6_Exercise1: Searching...
    [00:09:16.782,470] <inf> Lesson6_Exercise1: sv: 1, cn0: 245, signal: 1
    [00:09:16.782,470] <inf> Lesson6_Exercise1: Number of current satellites: 1
    [00:09:17.782,714] <inf> Lesson6_Exercise1: Searching...
    [00:09:17.782,714] <inf> Lesson6_Exercise1: Number of current satellites: 0
    [00:09:18.782,440] <inf> Lesson6_Exercise1: Searching...
    [00:09:18.782,470] <inf> Lesson6_Exercise1: Number of current satellites: 0
    [00:09:19.782,775] <inf> Lesson6_Exercise1: Searching...
    [00:09:19.782,775] <inf> Lesson6_Exercise1: Number of current satellites: 0
    [00:09:20.782,806] <inf> Lesson6_Exercise1: Searching...
    [00:09:20.782,836] <inf> Lesson6_Exercise1: Number of current satellites: 0
    [00:09:21.782,531] <inf> Lesson6_Exercise1: Searching...
    [00:09:21.782,531] <inf> Lesson6_Exercise1: Number of current satellites: 0
    [00:09:22.782,562] <inf> Lesson6_Exercise1: Searching...
    [00:09:22.782,592] <inf> Lesson6_Exercise1: Number of current satellites: 0
    [00:09:23.782,867] <inf> Lesson6_Exercise1: Searching...
    [00:09:23.782,867] <inf> Lesson6_Exercise1: Number of current satellites: 0
    [00:09:24.782,806] <inf> Lesson6_Exercise1: Searching...
    [00:09:24.782,836] <inf> Lesson6_Exercise1: Number of current satellites: 0
    [00:09:25.782,867] <inf> Lesson6_Exercise1: Searching...
    [00:09:25.782,867] <inf> Lesson6_Exercise1: Number of current satellites: 0
    [00:09:26.782,867] <inf> Lesson6_Exercise1: Searching...
    [00:09:26.782,897] <inf> Lesson6_Exercise1: Number of current satellites: 0
    [00:09:27.782,989] <inf> Lesson6_Exercise1: Searching...
    [00:09:27.783,020] <inf> Lesson6_Exercise1: sv: 1, cn0: 328, signal: 1
    [00:09:27.783,020] <inf> Lesson6_Exercise1: Number of current satellites: 1
    [00:09:28.782,897] <inf> Lesson6_Exercise1: Searching...
    [00:09:28.782,928] <inf> Lesson6_Exercise1: sv: 1, cn0: 254, signal: 1
    [00:09:28.782,928] <inf> Lesson6_Exercise1: Number of current satellites: 1
    [00:09:29.783,599] <inf> Lesson6_Exercise1: Searching...
    [00:09:29.783,599] <inf> Lesson6_Exercise1: sv: 1, cn0: 243, signal: 1
    [00:09:29.783,630] <inf> Lesson6_Exercise1: Number of current satellites: 1
    [00:09:30.782,989] <inf> Lesson6_Exercise1: Searching...
    [00:09:30.783,020] <inf> Lesson6_Exercise1: sv: 1, cn0: 249, signal: 1
    [00:09:30.783,050] <inf> Lesson6_Exercise1: Number of current satellites: 1
    [00:09:31.782,836] <inf> Lesson6_Exercise1: Searching...
    [00:09:31.782,836] <inf> Lesson6_Exercise1: Number of current satellites: 0
    [00:09:32.783,020] <inf> Lesson6_Exercise1: Searching...
    [00:09:32.783,050] <inf> Lesson6_Exercise1: Number of current satellites: 0
    [00:09:33.783,142] <inf> Lesson6_Exercise1: Searching...
    [00:09:33.783,172] <inf> Lesson6_Exercise1: Number of current satellites: 0
    [00:09:34.782,928] <inf> Lesson6_Exercise1: Searching...
    [00:09:34.782,958] <inf> Lesson6_Exercise1: Number of current satellites: 0
    [00:09:35.783,203] <inf> Lesson6_Exercise1: Searching...
    [00:09:35.783,233] <inf> Lesson6_Exercise1: Number of current satellites: 0
    [00:09:36.783,111] <inf> Lesson6_Exercise1: Searching...
    [00:09:36.783,142] <inf> Lesson6_Exercise1: sv: 9, cn0: 257, signal: 1
    [00:09:36.783,172] <inf> Lesson6_Exercise1: Number of current satellites: 1
    [00:09:37.783,721] <inf> Lesson6_Exercise1: Searching...
    [00:09:37.783,752] <inf> Lesson6_Exercise1: sv: 9, cn0: 247, signal: 1
    [00:09:37.783,752] <inf> Lesson6_Exercise1: Number of current satellites: 1
    [00:09:38.783,599] <inf> Lesson6_Exercise1: Searching...
    [00:09:38.783,630] <inf> Lesson6_Exercise1: sv: 9, cn0: 247, signal: 1
    [00:09:38.783,630] <inf> Lesson6_Exercise1: Number of current satellites: 1
    [00:09:39.783,050] <inf> Lesson6_Exercise1: Searching...
    [00:09:39.783,050] <inf> Lesson6_Exercise1: sv: 9, cn0: 246, signal: 1
    [00:09:39.783,081] <inf> Lesson6_Exercise1: Number of current satellites: 1
    [00:09:40.783,355] <inf> Lesson6_Exercise1: Searching...
    [00:09:40.783,386] <inf> Lesson6_Exercise1: Number of current satellites: 0
    [00:09:41.783,081] <inf> Lesson6_Exercise1: Searching...
    [00:09:41.783,111] <inf> Lesson6_Exercise1: Number of current satellites: 0
    [00:09:42.783,233] <inf> Lesson6_Exercise1: Searching...
    [00:09:42.783,264] <inf> Lesson6_Exercise1: Number of current satellites: 0
    [00:09:43.783,355] <inf> Lesson6_Exercise1: Searching...
    [00:09:43.783,355] <inf> Lesson6_Exercise1: Number of current satellites: 0
    [00:09:44.783,172] <inf> Lesson6_Exercise1: Searching...
    [00:09:44.783,203] <inf> Lesson6_Exercise1: Number of current satellites: 0
    [00:09:45.783,569] <inf> Lesson6_Exercise1: Searching...
    [00:09:45.783,599] <inf> Lesson6_Exercise1: Number of current satellites: 0
    [00:09:46.783,264] <inf> Lesson6_Exercise1: Searching...
    [00:09:46.783,294] <inf> Lesson6_Exercise1: Number of current satellites: 0
    [00:09:47.783,294] <inf> Lesson6_Exercise1: Searching...
    [00:09:47.783,294] <inf> Lesson6_Exercise1: Number of current satellites: 0
    [00:09:48.784,088] <inf> Lesson6_Exercise1: Searching...
    [00:09:48.784,118] <inf> Lesson6_Exercise1: Number of current satellites: 0
    [00:09:49.783,477] <inf> Lesson6_Exercise1: Searching...
    [00:09:49.783,477] <inf> Lesson6_Exercise1: sv: 11, cn0: 266, signal: 1
    [00:09:49.783,477] <inf> Lesson6_Exercise1: Number of current satellites: 1
    [00:09:50.783,752] <inf> Lesson6_Exercise1: Searching...
    [00:09:50.783,782] <inf> Lesson6_Exercise1: sv: 11, cn0: 245, signal: 1
    [00:09:50.783,813] <inf> Lesson6_Exercise1: Number of current satellites: 1
    [00:09:51.784,179] <inf> Lesson6_Exercise1: Searching...
    [00:09:51.784,179] <inf> Lesson6_Exercise1: sv: 11, cn0: 241, signal: 1
    [00:09:51.784,210] <inf> Lesson6_Exercise1: Number of current satellites: 1
    [00:09:52.783,508] <inf> Lesson6_Exercise1: Searching...
    [00:09:52.783,538] <inf> Lesson6_Exercise1: sv: 11, cn0: 243, signal: 1
    [00:09:52.783,538] <inf> Lesson6_Exercise1: Number of current satellites: 1
    [00:09:53.783,721] <inf> Lesson6_Exercise1: Searching...
    [00:09:53.783,721] <inf> Lesson6_Exercise1: Number of current satellites: 0
    [00:09:54.783,813] <inf> Lesson6_Exercise1: Searching...
    [00:09:54.783,843] <inf> Lesson6_Exercise1: Number of current satellites: 0
    [00:09:55.783,325] <inf> Lesson6_Exercise1: Searching...
    [00:09:55.783,325] <inf> Lesson6_Exercise1: Number of current satellites: 0
    [00:09:56.783,355] <inf> Lesson6_Exercise1: Searching...
    [00:09:56.783,386] <inf> Lesson6_Exercise1: Number of current satellites: 0
    [00:09:57.783,966] <inf> Lesson6_Exercise1: Searching...
    [00:09:57.783,966] <inf> Lesson6_Exercise1: Number of current satellites: 0
    [00:09:58.783,843] <inf> Lesson6_Exercise1: Searching...
    [00:09:58.783,905] <inf> Lesson6_Exercise1: sv: 5, cn0: 283, signal: 1
    [00:09:58.783,905] <inf> Lesson6_Exercise1: Number of current satellites: 1
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    [00:14:05.790,802] <inf> Lesson6_Exercise1: Searching...
    [00:14:05.790,802] <inf> Lesson6_Exercise1: Number of current satellites: 0
    [00:14:06.790,832] <inf> Lesson6_Exercise1: Searching...
    [00:14:06.790,863] <inf> Lesson6_Exercise1: Number of current satellites: 0
    [00:14:07.790,527] <inf> Lesson6_Exercise1: Searching...
    [00:14:07.790,557] <inf> Lesson6_Exercise1: Number of current satellites: 0
    [00:14:08.790,527] <inf> Lesson6_Exercise1: Searching...
    [00:14:08.790,557] <inf> Lesson6_Exercise1: Number of current satellites: 0
    [00:14:09.790,863] <inf> Lesson6_Exercise1: Searching...
    [00:14:09.790,893] <inf> Lesson6_Exercise1: Number of current satellites: 0
    [00:14:10.790,924] <inf> Lesson6_Exercise1: Searching...
    [00:14:10.790,954] <inf> Lesson6_Exercise1: Number of current satellites: 0
    [00:14:11.790,985] <inf> Lesson6_Exercise1: Searching...
    [00:14:11.790,985] <inf> Lesson6_Exercise1: Number of current satellites: 0
    [00:14:12.790,618] <inf> Lesson6_Exercise1: Searching...
    [00:14:12.790,649] <inf> Lesson6_Exercise1: Number of current satellites: 0
    [00:14:13.790,679] <inf> Lesson6_Exercise1: Searching...
    [00:14:13.790,679] <inf> Lesson6_Exercise1: Number of current satellites: 0
    [00:14:14.791,015] <inf> Lesson6_Exercise1: Searching...
    [00:14:14.791,046] <inf> Lesson6_Exercise1: Number of current satellites: 0
    [00:14:15.791,076] <inf> Lesson6_Exercise1: Searching...
    [00:14:15.791,076] <inf> Lesson6_Exercise1: Number of current satellites: 0
    [00:14:16.791,137] <inf> Lesson6_Exercise1: Searching...
    [00:14:16.791,168] <inf> Lesson6_Exercise1: Number of current satellites: 0
    [00:14:17.790,771] <inf> Lesson6_Exercise1: Searching...
    [00:14:17.790,802] <inf> Lesson6_Exercise1: Number of current satellites: 0
    [00:14:18.790,802] <inf> Lesson6_Exercise1: Searching...
    [00:14:18.790,832] <inf> Lesson6_Exercise1: Number of current satellites: 0
    [00:14:19.790,649] <inf> Lesson6_Exercise1: Searching...
    [00:14:19.790,649] <inf> Lesson6_Exercise1: Number of current satellites: 0
    [00:14:20.790,710] <inf> Lesson6_Exercise1: Searching...
    [00:14:20.790,740] <inf> Lesson6_Exercise1: Number of current satellites: 0
    [00:14:21.791,503] <inf> Lesson6_Exercise1: Searching...
    [00:14:21.791,534] <inf> Lesson6_Exercise1: Number of current satellites: 0
    [00:14:22.791,198] <inf> Lesson6_Exercise1: Searching...
    [00:14:22.791,229] <inf> Lesson6_Exercise1: Number of current satellites: 0
    [00:14:23.791,381] <inf> Lesson6_Exercise1: Searching...
    [00:14:23.791,381] <inf> Lesson6_Exercise1: Number of current satellites: 0
    [00:14:24.790,802] <inf> Lesson6_Exercise1: Searching...
    [00:14:24.790,832] <inf> Lesson6_Exercise1: Number of current satellites: 0
    [00:14:25.790,985] <inf> Lesson6_Exercise1: Searching...
    [00:14:25.790,985] <inf> Lesson6_Exercise1: Number of current satellites: 0
    [00:14:26.791,015] <inf> Lesson6_Exercise1: Searching...
    [00:14:26.791,046] <inf> Lesson6_Exercise1: Number of current satellites: 0
    [00:14:27.791,412] <inf> Lesson6_Exercise1: Searching...
    [00:14:27.791,442] <inf> Lesson6_Exercise1: Number of current satellites: 0
    [00:14:28.791,442] <inf> Lesson6_Exercise1: Searching...
    [00:14:28.791,473] <inf> Lesson6_Exercise1: Number of current satellites: 0
    [00:14:29.791,442] <inf> Lesson6_Exercise1: Searching...
    [00:14:29.791,442] <inf> Lesson6_Exercise1: Number of current satellites: 0
    [00:14:30.791,137] <inf> Lesson6_Exercise1: Searching...
    [00:14:30.791,168] <inf> Lesson6_Exercise1: Number of current satellites: 0
    [00:14:31.791,137] <inf> Lesson6_Exercise1: Searching...
    [00:14:31.791,168] <inf> Lesson6_Exercise1: Number of current satellites: 0
    [00:14:32.791,534] <inf> Lesson6_Exercise1: Searching...
    [00:14:32.791,564] <inf> Lesson6_Exercise1: Number of current satellites: 0
    [00:14:33.791,595] <inf> Lesson6_Exercise1: Searching...
    [00:14:33.791,595] <inf> Lesson6_Exercise1: Number of current satellites: 0
    [00:14:34.791,595] <inf> Lesson6_Exercise1: Searching...
    [00:14:34.791,625] <inf> Lesson6_Exercise1: Number of current satellites: 0
    [00:14:35.791,259] <inf> Lesson6_Exercise1: Searching...
    [00:14:35.791,259] <inf> Lesson6_Exercise1: Number of current satellites: 0
    [00:14:36.792,083] <inf> Lesson6_Exercise1: Searching...
    [00:14:36.792,114] <inf> Lesson6_Exercise1: Number of current satellites: 0
    [00:14:37.792,144] <inf> Lesson6_Exercise1: Searching...
    [00:14:37.792,144] <inf> Lesson6_Exercise1: sv: 6, cn0: 251, signal: 1
    [00:14:37.792,144] <inf> Lesson6_Exercise1: Number of current satellites: 1
    [00:14:38.792,266] <inf> Lesson6_Exercise1: Searching...
    [00:14:38.792,297] <inf> Lesson6_Exercise1: sv: 6, cn0: 245, signal: 1
    [00:14:38.792,297] <inf> Lesson6_Exercise1: Number of current satellites: 1
    [00:14:39.791,656] <inf> Lesson6_Exercise1: Searching...
    [00:14:39.791,687] <inf> Lesson6_Exercise1: sv: 6, cn0: 246, signal: 1
    [00:14:39.791,687] <inf> Lesson6_Exercise1: Number of current satellites: 1
    [00:14:40.791,992] <inf> Lesson6_Exercise1: Searching...
    [00:14:40.792,022] <inf> Lesson6_Exercise1: sv: 6, cn0: 247, signal: 1
    [00:14:40.792,022] <inf> Lesson6_Exercise1: Number of current satellites: 1
    [00:14:41.791,748] <inf> Lesson6_Exercise1: Searching...
    [00:14:41.791,748] <inf> Lesson6_Exercise1: Number of current satellites: 0
    [00:14:42.791,778] <inf> Lesson6_Exercise1: Searching...
    [00:14:42.791,809] <inf> Lesson6_Exercise1: Number of current satellites: 0
    [00:14:43.791,473] <inf> Lesson6_Exercise1: Searching...
    [00:14:43.791,503] <inf> Lesson6_Exercise1: Number of current satellites: 0
    [00:14:44.791,564] <inf> Lesson6_Exercise1: Searching...
    [00:14:44.791,595] <inf> Lesson6_Exercise1: Number of current satellites: 0
    [00:14:45.791,839] <inf> Lesson6_Exercise1: Searching...
    [00:14:45.791,870] <inf> Lesson6_Exercise1: Number of current satellites: 0
    [00:14:46.791,931] <inf> Lesson6_Exercise1: Searching...
    [00:14:46.791,992] <inf> Lesson6_Exercise1: Number of current satellites: 0
    [00:14:47.791,900] <inf> Lesson6_Exercise1: Searching...
    [00:14:47.791,931] <inf> Lesson6_Exercise1: Number of current satellites: 0
    [00:14:48.791,687] <inf> Lesson6_Exercise1: Searching...
    [00:14:48.791,717] <inf> Lesson6_Exercise1: Number of current satellites: 0
    [00:14:49.791,687] <inf> Lesson6_Exercise1: Searching...
    [00:14:49.791,687] <inf> Lesson6_Exercise1: Number of current satellites: 0
    [00:14:50.791,992] <inf> Lesson6_Exercise1: Searching...
    [00:14:50.792,022] <inf> Lesson6_Exercise1: Number of current satellites: 0
    [00:14:51.792,053] <inf> Lesson6_Exercise1: Searching...
    [00:14:51.792,053] <inf> Lesson6_Exercise1: Number of current satellites: 0
    [00:14:52.792,053] <inf> Lesson6_Exercise1: Searching...
    [00:14:52.792,083] <inf> Lesson6_Exercise1: Number of current satellites: 0
    [00:14:53.791,778] <inf> Lesson6_Exercise1: Searching...
    [00:14:53.791,778] <inf> Lesson6_Exercise1: Number of current satellites: 0
    [00:14:54.791,809] <inf> Lesson6_Exercise1: Searching...
    [00:14:54.791,839] <inf> Lesson6_Exercise1: Number of current satellites: 0
    [00:14:55.792,144] <inf> Lesson6_Exercise1: Searching...
    [00:14:55.792,144] <inf> Lesson6_Exercise1: Number of current satellites: 0
    [00:14:56.791,717] <inf> Lesson6_Exercise1: Searching...
    [00:14:56.791,748] <inf> Lesson6_Exercise1: Number of current satellites: 0
    [00:14:57.791,717] <inf> Lesson6_Exercise1: Searching...
    [00:14:57.791,717] <inf> Lesson6_Exercise1: Number of current satellites: 0
    [00:14:58.792,449] <inf> Lesson6_Exercise1: Searching...
    [00:14:58.792,480] <inf> Lesson6_Exercise1: Number of current satellites: 0
    [00:14:59.792,510] <inf> Lesson6_Exercise1: Searching...
    [00:14:59.792,510] <inf> Lesson6_Exercise1: Number of current satellites: 0
    [00:15:00.792,358] <inf> Lesson6_Exercise1: Searching...
    [00:15:00.792,388] <inf> Lesson6_Exercise1: Number of current satellites: 0
    [00:15:01.792,266] <inf> Lesson6_Exercise1: Searching...
    [00:15:01.792,297] <inf> Lesson6_Exercise1: Number of current satellites: 0
    [00:15:02.792,022] <inf> Lesson6_Exercise1: Searching...
    [00:15:02.792,053] <inf> Lesson6_Exercise1: Number of current satellites: 0
    [00:15:03.792,358] <inf> Lesson6_Exercise1: Searching...
    [00:15:03.792,388] <inf> Lesson6_Exercise1: Number of current satellites: 0
    [00:15:04.792,449] <inf> Lesson6_Exercise1: Searching...
    [00:15:04.792,480] <inf> Lesson6_Exercise1: Number of current satellites: 0
    [00:15:05.792,419] <inf> Lesson6_Exercise1: Searching...
    [00:15:05.792,419] <inf> Lesson6_Exercise1: Number of current satellites: 0
    [00:15:06.792,144] <inf> Lesson6_Exercise1: Searching...
    [00:15:06.792,175] <inf> Lesson6_Exercise1: Number of current satellites: 0
    [00:15:07.792,144] <inf> Lesson6_Exercise1: Searching...
    [00:15:07.792,175] <inf> Lesson6_Exercise1: Number of current satellites: 0
    [00:15:08.792,480] <inf> Lesson6_Exercise1: Searching...
    [00:15:08.792,541] <inf> Lesson6_Exercise1: Number of current satellites: 0
    [00:15:09.792,572] <inf> Lesson6_Exercise1: Searching...
    [00:15:09.792,572] <inf> Lesson6_Exercise1: Number of current satellites: 0
    [00:15:10.792,572] <inf> Lesson6_Exercise1: Searching...
    [00:15:10.792,602] <inf> Lesson6_Exercise1: Number of current satellites: 0
    [00:15:11.792,266] <inf> Lesson6_Exercise1: Searching...
    [00:15:11.792,266] <inf> Lesson6_Exercise1: Number of current satellites: 0
    [00:15:12.792,297] <inf> Lesson6_Exercise1: Searching...
    [00:15:12.792,327] <inf> Lesson6_Exercise1: Number of current satellites: 0
    [00:15:13.792,633] <inf> Lesson6_Exercise1: Searching...
    [00:15:13.792,663] <inf> Lesson6_Exercise1: Number of current satellites: 0
    [00:15:14.792,694] <inf> Lesson6_Exercise1: Searching...
    [00:15:14.792,724] <inf> Lesson6_Exercise1: Number of current satellites: 0
    [00:15:15.792,694] <inf> Lesson6_Exercise1: Searching...
    [00:15:15.792,694] <inf> Lesson6_Exercise1: Number of current satellites: 0
    [00:15:16.792,999] <inf> Lesson6_Exercise1: Searching...
    [00:15:16.793,029] <inf> Lesson6_Exercise1: Number of current satellites: 0
    [00:15:17.792,266] <inf> Lesson6_Exercise1: Searching...
    [00:15:17.792,266] <inf> Lesson6_Exercise1: Number of current satellites: 0
    [00:15:18.792,449] <inf> Lesson6_Exercise1: Searching...
    [00:15:18.792,480] <inf> Lesson6_Exercise1: Number of current satellites: 0
    [00:15:19.792,358] <inf> Lesson6_Exercise1: Searching...
    [00:15:19.792,358] <inf> Lesson6_Exercise1: Number of current satellites: 0
    [00:15:20.792,816] <inf> Lesson6_Exercise1: Searching...
    [00:15:20.792,846] <inf> Lesson6_Exercise1: Number of current satellites: 0
    [00:15:21.792,846] <inf> Lesson6_Exercise1: Searching...
    [00:15:21.792,846] <inf> Lesson6_Exercise1: Number of current satellites: 0
    [00:15:22.792,877] <inf> Lesson6_Exercise1: Searching...
    [00:15:22.792,907] <inf> Lesson6_Exercise1: Number of current satellites: 0
    [00:15:23.792,968] <inf> Lesson6_Exercise1: Searching...
    [00:15:23.792,968] <inf> Lesson6_Exercise1: Number of current satellites: 0
    [00:15:24.792,663] <inf> Lesson6_Exercise1: Searching...
    [00:15:24.792,694] <inf> Lesson6_Exercise1: Number of current satellites: 0
    [00:15:25.792,663] <inf> Lesson6_Exercise1: Searching...
    [00:15:25.792,663] <inf> Lesson6_Exercise1: Number of current satellites: 0
    [00:15:26.793,060] <inf> Lesson6_Exercise1: Searching...
    [00:15:26.793,090] <inf> Lesson6_Exercise1: Number of current satellites: 0
    [00:15:27.792,999] <inf> Lesson6_Exercise1: Searching...
    [00:15:27.793,029] <inf> Lesson6_Exercise1: Number of current satellites: 0
    [00:15:28.793,060] <inf> Lesson6_Exercise1: Searching...
    [00:15:28.793,090] <inf> Lesson6_Exercise1: Number of current satellites: 0
    [00:15:29.792,755] <inf> Lesson6_Exercise1: Searching...
    [00:15:29.792,785] <inf> Lesson6_Exercise1: Number of current satellites: 0
    [00:15:30.792,785] <inf> Lesson6_Exercise1: Searching...
    [00:15:30.792,816] <inf> Lesson6_Exercise1: Number of current satellites: 0
    [00:15:31.793,182] <inf> Lesson6_Exercise1: Searching...
    [00:15:31.793,182] <inf> Lesson6_Exercise1: Number of current satellites: 0
    [00:15:32.792,724] <inf> Lesson6_Exercise1: Searching...
    [00:15:32.792,755] <inf> Lesson6_Exercise1: Number of current satellites: 0
    [00:15:33.792,694] <inf> Lesson6_Exercise1: Searching...
    [00:15:33.792,724] <inf> Lesson6_Exercise1: Number of current satellites: 0
    [00:15:34.792,907] <inf> Lesson6_Exercise1: Searching...
    [00:15:34.792,938] <inf> Lesson6_Exercise1: Number of current satellites: 0
    [00:15:35.793,212] <inf> Lesson6_Exercise1: Searching...
    [00:15:35.793,212] <inf> Lesson6_Exercise1: Number of current satellites: 0
    [00:15:36.793,243] <inf> Lesson6_Exercise1: Searching...
    [00:15:36.793,273] <inf> Lesson6_Exercise1: Number of current satellites: 0
    [00:15:37.793,273] <inf> Lesson6_Exercise1: Searching...
    [00:15:37.793,273] <inf> Lesson6_Exercise1: Number of current satellites: 0
    [00:15:38.793,029] <inf> Lesson6_Exercise1: Searching...
    [00:15:38.793,060] <inf> Lesson6_Exercise1: Number of current satellites: 0
    [00:15:39.793,334] <inf> Lesson6_Exercise1: Searching...
    [00:15:39.793,365] <inf> Lesson6_Exercise1: Number of current satellites: 0
    [00:15:40.793,365] <inf> Lesson6_Exercise1: Searching...
    [00:15:40.793,395] <inf> Lesson6_Exercise1: Number of current satellites: 0
    [00:15:41.793,395] <inf> Lesson6_Exercise1: Searching...
    [00:15:41.793,426] <inf> Lesson6_Exercise1: Number of current satellites: 0
    [00:15:42.793,182] <inf> Lesson6_Exercise1: Searching...
    [00:15:42.793,212] <inf> Lesson6_Exercise1: Number of current satellites: 0
    [00:15:43.793,151] <inf> Lesson6_Exercise1: Searching...
    [00:15:43.793,151] <inf> Lesson6_Exercise1: Number of current satellites: 0
    [00:15:44.793,518] <inf> Lesson6_Exercise1: Searching...
    [00:15:44.793,548] <inf> Lesson6_Exercise1: Number of current satellites: 0
    [00:15:45.793,518] <inf> Lesson6_Exercise1: Searching...
    [00:15:45.793,518] <inf> Lesson6_Exercise1: Number of current satellites: 0
    [00:15:46.793,548] <inf> Lesson6_Exercise1: Searching...
    [00:15:46.793,579] <inf> Lesson6_Exercise1: Number of current satellites: 0
    [00:15:47.793,273] <inf> Lesson6_Exercise1: Searching...
    [00:15:47.793,273] <inf> Lesson6_Exercise1: Number of current satellites: 0
    [00:15:48.793,304] <inf> Lesson6_Exercise1: Searching...
    [00:15:48.793,334] <inf> Lesson6_Exercise1: Number of current satellites: 0
    [00:15:49.793,640] <inf> Lesson6_Exercise1: Searching...
    [00:15:49.793,640] <inf> Lesson6_Exercise1: Number of current satellites: 0
    [00:15:50.793,670] <inf> Lesson6_Exercise1: Searching...
    [00:15:50.793,701] <inf> Lesson6_Exercise1: Number of current satellites: 0
    [00:15:51.793,701] <inf> Lesson6_Exercise1: Searching...
    [00:15:51.793,701] <inf> Lesson6_Exercise1: Number of current satellites: 0
    [00:15:52.793,457] <inf> Lesson6_Exercise1: Searching...
    [00:15:52.793,487] <inf> Lesson6_Exercise1: Number of current satellites: 0
    [00:15:53.793,975] <inf> Lesson6_Exercise1: Searching...
    [00:15:53.794,006] <inf> Lesson6_Exercise1: Number of current satellites: 0
    [00:15:54.793,792] <inf> Lesson6_Exercise1: Searching...
    [00:15:54.793,823] <inf> Lesson6_Exercise1: Number of current satellites: 0
    [00:15:55.793,853] <inf> Lesson6_Exercise1: Searching...
    [00:15:55.793,853] <inf> Lesson6_Exercise1: Number of current satellites: 0
    [00:15:56.793,823] <inf> Lesson6_Exercise1: Searching...
    [00:15:56.793,853] <inf> Lesson6_Exercise1: Number of current satellites: 0
    [00:15:57.793,823] <inf> Lesson6_Exercise1: Searching...
    [00:15:57.793,823] <inf> Lesson6_Exercise1: Number of current satellites: 0
    [00:15:58.794,128] <inf> Lesson6_Exercise1: Searching...
    [00:15:58.794,158] <inf> Lesson6_Exercise1: Number of current satellites: 0
    [00:15:59.793,914] <inf> Lesson6_Exercise1: Searching...
    [00:15:59.793,914] <inf> Lesson6_Exercise1: Number of current satellites: 0
    [00:16:00.793,945] <inf> Lesson6_Exercise1: Searching...
    [00:16:00.793,975] <inf> Lesson6_Exercise1: Number of current satellites: 0
    [00:16:01.794,006] <inf> Lesson6_Exercise1: Searching...
    [00:16:01.794,006] <inf> Lesson6_Exercise1: Number of current satellites: 0
    [00:16:02.793,701] <inf> Lesson6_Exercise1: Searching...
    [00:16:02.793,731] <inf> Lesson6_Exercise1: Number of current satellites: 0
    [00:16:03.793,701] <inf> Lesson6_Exercise1: Searching...
    [00:16:03.793,701] <inf> Lesson6_Exercise1: Number of current satellites: 0
    [00:16:04.793,731] <inf> Lesson6_Exercise1: Searching...
    [00:16:04.793,762] <inf> Lesson6_Exercise1: Number of current satellites: 0
    [00:16:05.794,097] <inf> Lesson6_Exercise1: Searching...
    [00:16:05.794,128] <inf> Lesson6_Exercise1: Number of current satellites: 0
    [00:16:06.793,884] <inf> Lesson6_Exercise1: Searching...
    [00:16:06.793,914] <inf> Lesson6_Exercise1: Number of current satellites: 0
    [00:16:07.794,097] <inf> Lesson6_Exercise1: Searching...
    [00:16:07.794,128] <inf> Lesson6_Exercise1: Number of current satellites: 0
    [00:16:08.794,128] <inf> Lesson6_Exercise1: Searching...
    [00:16:08.794,158] <inf> Lesson6_Exercise1: Number of current satellites: 0
    [00:16:09.794,189] <inf> Lesson6_Exercise1: Searching...
    [00:16:09.794,189] <inf> Lesson6_Exercise1: Number of current satellites: 0
    [00:16:10.794,464] <inf> Lesson6_Exercise1: Searching...
    [00:16:10.794,494] <inf> Lesson6_Exercise1: Number of current satellites: 0
    [00:16:11.793,975] <inf> Lesson6_Exercise1: Searching...
    [00:16:11.794,006] <inf> Lesson6_Exercise1: Number of current satellites: 0
    [00:16:12.794,342] <inf> Lesson6_Exercise1: Searching...
    [00:16:12.794,372] <inf> Lesson6_Exercise1: Number of current satellites: 0
    [00:16:13.794,281] <inf> Lesson6_Exercise1: Searching...
    [00:16:13.794,281] <inf> Lesson6_Exercise1: Number of current satellites: 0
    [00:16:14.794,311] <inf> Lesson6_Exercise1: Searching...
    [00:16:14.794,342] <inf> Lesson6_Exercise1: Number of current satellites: 0
    [00:16:15.794,616] <inf> Lesson6_Exercise1: Searching...
    [00:16:15.794,616] <inf> Lesson6_Exercise1: Number of current satellites: 0
    [00:16:16.794,647] <inf> Lesson6_Exercise1: Searching...
    [00:16:16.794,677] <inf> Lesson6_Exercise1: Number of current satellites: 0
    [00:16:17.794,128] <inf> Lesson6_Exercise1: Searching...
    [00:16:17.794,128] <inf> Lesson6_Exercise1: Number of current satellites: 0
    [00:16:18.794,433] <inf> Lesson6_Exercise1: Searching...
    [00:16:18.794,464] <inf> Lesson6_Exercise1: Number of current satellites: 0
    [00:16:19.794,494] <inf> Lesson6_Exercise1: Searching...
    [00:16:19.794,494] <inf> Lesson6_Exercise1: Number of current satellites: 0
    

    Given this output, is there a reason the AT commands successfully acquire a fix while the Lesson 6 code does not?

  • Hi Hunter,

    Can you confirm which version of NCS you are using (e.g. version 3.0.1) and which modem firmware version (e.g. 2.0.2)?

    For completeness (Exercise 2), can you confirm what SIM card you are using -- Verizon, AT&T, T-mobile, iBasis, Soracom, Hologram.io, Onomondo, or something else? 

    • With the MNOs (Verizon, AT&T, and T-mobile), you will definitely get PSM support but that is not always guaranteed with the MVNOs.

    I am in your time zone so hopefully I can help you resolve why you are not getting fixes using the application code.  By the way, you can also try the GNSS sample which also removes the LTE multiplexing or sharing.  See ...nrf\samples\cellular\gnss

    Thanks

    Mike

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