Unable to Establish Connection to BC832 on NRF Connect After Programming via NRF52 DK

Question

I am trying to program the BC832 ( https ://www .fanstel .com /bt832 -1 ) using the NRF52DK (NRF52832). BC832 is a Bluetooth Low Energy (BLE) 5.3 with NFC module using Nordic nRF52832 SoC. A chip antenna is integrated. 
 I followed the wiring instructions provided in this link: https ://devzone .nordicsemi .com /f /nordic -q -a /55203 /programming -external -board -bc832 -with -nrf52840 -dk . 
 
 The result is that I can see the device name in NRF Connect, but it does not display signal strength (dBm) or connection latency (ms), and I am unable to connect to the device. 
 
 However, when I use the same code to program the NRF52DK, I can successfully connect to it in NRF Connect, see the signal strength and connection latency, and execute my intended commands. 
 
 I want to control the BC832 via my phone to achieve motor forward and reverse rotation by changing the GPIO pin's high and low levels. And here is my project file on SEGGER Embedded Studio, the path is "\ble_app_uart_bc832\pca10040\s132\ses" 
 ble_app_uart_bc832.zip 
 
 Could anyone kindly help me understand what might be causing the issue and suggest how I might resolve it? 
 Thank you very much for your kind help!

hmolesworth · Accepted Answer

Sloppy low-frequency clocks are fine for advertising but useless for a BLE connection. There is no 32kHz crystal fitted to this module (unless you added one) so these definitions (which assume LF crystal) are incorrect: //========================================================== // Clock - SoftDevice clock configuration //========================================================== // 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 1 #endif // NRF_SDH_CLOCK_LF_RC_CTIV - SoftDevice calibration timer interval. #ifndef NRF_SDH_CLOCK_LF_RC_CTIV #define NRF_SDH_CLOCK_LF_RC_CTIV 0 #endif // NRF_SDH_CLOCK_LF_RC_TEMP_CTIV - SoftDevice calibration timer interval under constant temperature. // How often (in number of calibration intervals) the RC oscillator shall be calibrated // if the temperature has not changed. #ifndef NRF_SDH_CLOCK_LF_RC_TEMP_CTIV #define NRF_SDH_CLOCK_LF_RC_TEMP_CTIV 0 #endif // 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 7 #endif Rather than messing around trying to fix this I usually add the following at the top of sdk_config.h : #define NRFX_CLOCK_CONFIG_LF_SRC 0 #define CLOCK_CONFIG_LF_SRC 0 #define NRF_SDH_CLOCK_LF_SRC 0 #define NRF_SDH_CLOCK_LF_RC_CTIV 16 #define NRF_SDH_CLOCK_LF_RC_TEMP_CTIV 2 #define NRF_SDH_CLOCK_LF_ACCURACY 1 // <1=> NRF_CLOCK_LF_ACCURACY_500_PPM

Unable to Establish Connection to BC832 on NRF Connect After Programming via NRF52 DK

Top Replies