NRF CONNECT APP AND NRF805

[lm]

Hello, 

I'm working with a NRF52840 DK and a module BLE nrf805.

I'm programming thanks to the software SEGGER.

I have sent the blinky simple in my dev kit to test a simple thing. For about 2 months now, i have been working with the Module BLE 805 because i have to use it for a project. After several times, i followed the tutorial (https://devzone.nordicsemi.com/guides/short-range-guides/b/getting-started/posts/developing-for-the-nrf52805-with-nrf5-sdk) and i used the example that was given because i wanted to send The peripheral UART example (Peripheral UART/Serial Port Emulation over BLE (ble_app_uart)) 

. It worked because with my dk and my module fixed to it. But i remark something that i don't understand : theAPP. (nrf connect app)

The first time that i send my program i saw in my app my module and his correct mac adress. But now i dont know why i cant see the device anymore (even when im trying to resend it)

Did someone has already had this issue?

Is that a problem of stability? 

thanks in advance

[lm]

Yes, i tried actually with the 2 " Debug in" and" debug out" and i don't why i can send the program (blinky or peripheral uart) but i cant see any type of program in nrf connect application on my phone.

I'm kind of worried because last week it was working i saw the program ( on my nrf52840 and in my 805 ) i was happy because i was finally able to flash the code and see it in the app.

But after a few seconds, i couldnt see the program anymore it desapears on the phone, I told myself its okay im going to change the app duration in my code (main part) but since then impossible to see the flash of the code of the nrf805 (nrf52840 working more or less)

i have the feeling that the fact to send this program is unstable on my nrf805

Do you understand or do you have an explanation?

Thank you in advance

Best regards. 

[Simonr]

Hi

I'm not familiar with what board you're using the nRF52805 module on, but do you know if it includes a LF crystal? If not, that could be why you only saw the device advertising for a brief moment before the application drifted without the correct clock configuration. 

Can you try setting the following defines in your project's sdk_config.h header file to these values and flash it onto your nRF52805 (using the Debug Out pin header).

//==========================================================
// <o> NRF_SDH_CLOCK_LF_SRC  - SoftDevice clock source.

// <0=> NRF_CLOCK_LF_SRC_RC
// <1=> NRF_CLOCK_LF_SRC_XTAL
// <2=> NRF_CLOCK_LF_SRC_SYNTH

#ifndef NRF_SDH_CLOCK_LF_SRC
#define NRF_SDH_CLOCK_LF_SRC 0
#endif

// <o> NRF_SDH_CLOCK_LF_RC_CTIV - SoftDevice calibration timer interval.
#ifndef NRF_SDH_CLOCK_LF_RC_CTIV
#define NRF_SDH_CLOCK_LF_RC_CTIV 16
#endif

// <o> NRF_SDH_CLOCK_LF_RC_TEMP_CTIV - SoftDevice calibration timer interval under constant temperature.
// <i> How often (in number of calibration intervals) the RC oscillator shall be calibrated
// <i>  if the temperature has not changed.

#ifndef NRF_SDH_CLOCK_LF_RC_TEMP_CTIV
#define NRF_SDH_CLOCK_LF_RC_TEMP_CTIV 2
#endif

// <o> NRF_SDH_CLOCK_LF_ACCURACY  - External clock accuracy used in the LL to compute timing.

// <0=> NRF_CLOCK_LF_ACCURACY_250_PPM
// <1=> NRF_CLOCK_LF_ACCURACY_500_PPM
// <2=> NRF_CLOCK_LF_ACCURACY_150_PPM
// <3=> NRF_CLOCK_LF_ACCURACY_100_PPM
// <4=> NRF_CLOCK_LF_ACCURACY_75_PPM
// <5=> NRF_CLOCK_LF_ACCURACY_50_PPM
// <6=> NRF_CLOCK_LF_ACCURACY_30_PPM
// <7=> NRF_CLOCK_LF_ACCURACY_20_PPM
// <8=> NRF_CLOCK_LF_ACCURACY_10_PPM
// <9=> NRF_CLOCK_LF_ACCURACY_5_PPM
// <10=> NRF_CLOCK_LF_ACCURACY_2_PPM
// <11=> NRF_CLOCK_LF_ACCURACY_1_PPM

#ifndef NRF_SDH_CLOCK_LF_ACCURACY
#define NRF_SDH_CLOCK_LF_ACCURACY 1
#endif

Best regards,

Simon

[lm]

okay thank you some much. I'm going to try this

[lm]

hello, i changed the info but it doesnt change nothing... the app is not seen after a few minutes by the phone and idont have a com with putty like i told you in the old post