Fanstel BT840F not connecting.

RE: Fanstel BT840F not connecting.

Tesseract — Fri, 28 Aug 2020 21:21:59 GMT

Simon. It was the RC. So changing the clock source in prj.conf to:
CONFIG_CLOCK_CONTROL_NRF_K32SRC_RC=y
CONFIG_CLOCK_CONTROL_NRF_K32SRC_250PPM=y

I can now connect with Fanstel BT840F.
Thank you for the help.
Rgrds Jakes

RE: Fanstel BT840F not connecting.

Tesseract — Fri, 28 Aug 2020 20:22:35 GMT

Simon I am using zephyr and cannot figure out how to set clock configurations.
I am using platformio IDE, so I do not have menu options, but need to change on file level.
If I have to do it using kconfig.nrf, what is the configuration above? How do I specify RC 32 kHz and 250PPM?
I read docs here, https://docs.zephyrproject.org/1.10.0/reference/kconfig/index.html
I tried in proj.conf file:
CONFIG_CLOCK_CONTROL_NRF5_K32SRC_RC=y
CONFIG_CLOCK_CONTROL_NRF5_K32SRC_250PPM=y
Giving me errors.
Your help will be apreciated.
Warm Regards Jakes

RE: Fanstel BT840F not connecting.

Tesseract — Fri, 28 Aug 2020 13:31:14 GMT

Thank you Simon. I wll try and report back. Rgrds

RE: Fanstel BT840F not connecting.

Simonr — Fri, 28 Aug 2020 10:58:47 GMT

Indeed, I suspect this is the crystal as well. In order to use the internal RC oscillator instead of the external crystal, you have to (if using SES) go to Options->Configure nRF Connect SDK Project, search for clock. Set 32kHz clock source to RC oscillator instead of crystal oscillator, and set 32kHz clock accuracy to 151 ppm to 250 ppm. Alternatively, you can make these changes in the /drivers/clock_control/Kconfig file directly.

Best regards,

Simon

RE: Fanstel BT840F not connecting.

Tesseract — Fri, 28 Aug 2020 08:25:21 GMT

Sorry here is hex file working on NRF52840 but not on Fanstel BT840Fdevzone.nordicsemi.com/.../firmware.hex