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.

Parents
  • 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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    [00:00:32.597,808] <inf> Lesson6_Exercise1: sv: 27, cn0: 478, signal: 1
    [00:00:32.597,839] <inf> Lesson6_Exercise1: sv: 26, cn0: 416, signal: 1
    [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

Reply
  • 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
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    [00:00:30.598,510] <inf> Lesson6_Exercise1: sv: 16, cn0: 455, signal: 1
    [00:00:30.598,510] <inf> Lesson6_Exercise1: sv: 15, cn0: 401, signal: 1
    [00:00:30.598,541] <inf> Lesson6_Exercise1: sv: 10, cn0: 409, signal: 1
    [00:00:30.598,541] <inf> Lesson6_Exercise1: sv: 5, cn0: 373, signal: 1
    [00:00:30.598,571] <inf> Lesson6_Exercise1: sv: 7, cn0: 394, signal: 1
    [00:00:30.598,602] <inf> Lesson6_Exercise1: sv: 13, cn0: 384, signal: 1
    [00:00:30.598,602] <inf> Lesson6_Exercise1: sv: 196, cn0: 351, signal: 3
    [00:00:30.598,632] <inf> Lesson6_Exercise1: sv: 8, cn0: 388, signal: 1
    [00:00:30.598,632] <inf> Lesson6_Exercise1: Number of current satellites: 12
    [00:00:31.597,717] <inf> Lesson6_Exercise1: Searching...
    [00:00:31.597,747] <inf> Lesson6_Exercise1: sv: 27, cn0: 478, signal: 1
    [00:00:31.597,778] <inf> Lesson6_Exercise1: sv: 26, cn0: 415, signal: 1
    [00:00:31.597,778] <inf> Lesson6_Exercise1: sv: 23, cn0: 452, signal: 1
    [00:00:31.597,808] <inf> Lesson6_Exercise1: sv: 18, cn0: 444, signal: 1
    [00:00:31.597,808] <inf> Lesson6_Exercise1: sv: 16, cn0: 456, signal: 1
    [00:00:31.597,839] <inf> Lesson6_Exercise1: sv: 15, cn0: 402, signal: 1
    [00:00:31.597,839] <inf> Lesson6_Exercise1: sv: 10, cn0: 406, signal: 1
    [00:00:31.597,869] <inf> Lesson6_Exercise1: sv: 5, cn0: 374, signal: 1
    [00:00:31.597,869] <inf> Lesson6_Exercise1: sv: 7, cn0: 395, signal: 1
    [00:00:31.597,930] <inf> Lesson6_Exercise1: sv: 13, cn0: 385, signal: 1
    [00:00:31.597,930] <inf> Lesson6_Exercise1: sv: 196, cn0: 351, signal: 3
    [00:00:31.597,961] <inf> Lesson6_Exercise1: sv: 8, cn0: 386, signal: 1
    [00:00:31.597,961] <inf> Lesson6_Exercise1: Number of current satellites: 12
    [00:00:32.597,778] <inf> Lesson6_Exercise1: Searching...
    [00:00:32.597,808] <inf> Lesson6_Exercise1: sv: 27, cn0: 478, signal: 1
    [00:00:32.597,839] <inf> Lesson6_Exercise1: sv: 26, cn0: 416, signal: 1
    [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

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