nRF52382 SparkFun Breakout Bluetooth Transmission wrong

RE: nRF52382 SparkFun Breakout Bluetooth Transmission wrong

run_ar — Fri, 01 Feb 2019 12:34:51 GMT

What is the complete laser marking on top of the chip that is failing?

I assume you are going to sleep (calling power_manage in the main loop) in between sending the advertisements? Could you try to comment that part of the code so you do not go to sleep, and see if that helps?

RE: nRF52382 SparkFun Breakout Bluetooth Transmission wrong

danilbso — Mon, 28 Jan 2019 17:41:30 GMT

1. How often are you updating the manufacturer specific data?

I'm updating the manufacturer specific data every 110ms, through this define statement:

#define APP_ADV_INTERVAL    MSEC_TO_UNITS(110, UNIT_0_625_MS)

2. Does this happen 5-10% of the time even if you do not update the data?

Yes, I just tested with a string of static data, like "1234567890" and the same effect happened.

3. Are you checking the crc on the sniffer?

Yes, I'm using the ubertooth library with CRC verify as 'true'. The adv packets of the Nordic DK doesn't show any disturbances.

4. How many failing boards do you have and what is the failure rate?

Actually I have only one board here to test. My application will envolve several boards, but if this error continues I'll need to look for another board.

5. What sparkfun board are you using?

https://www.sparkfun.com/products/13990

6. and how are you powering this?

I offen power with the DK board itself, using the 5V pin (DK) to the Vin pin (SparkFun). I thought this might be the problem, but I tested with alkaline batteries on the 3V3 pin as well, but the problem persists.

RE: nRF52382 SparkFun Breakout Bluetooth Transmission wrong

run_ar — Mon, 28 Jan 2019 14:21:59 GMT

How often are you updating the manufacturer specific data? Does this happen 5-10% of the time even if you do not update the data? Are you checking the crc on the sniffer? How many failing boards do you have and what is the failure rate? What sparkfun board are you using? and how are you powering this?