nRF52840 Bluetooth not work

[uldara]

Hi i just bough module nRF52840 from EBYTE.

i test with peripheral work as normal but example Bluetooth Uart not working .  i uploaded success but no device found from my phone.

does module need crystal 32.768khz or not ? because this module don't have crystal 32.768khz

[AndreasF]

Hi.

The ble_app_uart example is configured to use a LF crystal, you have to change this in the sdk_config so that it uses the RC inside the nRF52840 chip.

Set "NRFX_CLOCK_CONFIG_LF_SRC 0" in SDK config so that it uses RC.

// <0=> RC 
// <1=> XTAL 
// <2=> Synth 
// <131073=> External Low Swing 
// <196609=> External Full Swing 

#ifndef NRFX_CLOCK_CONFIG_LF_SRC
#define NRFX_CLOCK_CONFIG_LF_SRC 0
#endif

Best regards,

Andreas

[uldara]

ok thank 

i will try 

:)