nrf52840 can not scan any BLE device or being scanned by nRF Connect on my customer board with example "ble_app_att_mtu_throughput"

[zxd]

With my custom board I can program it, debug it and it output log ok, but just can not be scanned or scanning any other ble devices. 

besides: the code works well in other demo board.

the output log as fallows:

[00:00:00.000,000] <debug> ble_scan: Adding filter on CPS_xxx name
[00:00:00.000,183] <info> app: ATT MTU example started.
[00:00:00.000,183] <info> app: Press button 3 on the board connected to the PC.
[00:00:00.000,183] <info> app: Press button 4 on other board.
[00:00:00.000,213] <info> app: This board will act as responder.
[00:00:00.000,213] <info> app: Starting advertising.
[00:00:00.008,056] <info> app: Starting scanning.
[00:00:00.008,209] <debug> ble_scan: Scanning

 

Thanks.

[paul]

Hi Zxd,

            one thing that always got me moving from the dk to my custom board was the clock source. Check sdk_config.h for NRF_SDH_CLOCK_LF_SRC. The DK board has a crystal so the default for config is to use the crystal. The Synth option combines the hf clock with the lf clock to fudge it. However it has high power drain. The RC one is the one to use if you don't have a crystal installed.

hope this helps

Paul

[zxd]

Hi paul,

          Thanks for your fast answer.

           I'm sorry for forgetting to tell that my customer board has 32KHz crystal; and finally, after I change the 32MHz crystal from demo board to my board, it work ok , but I don't why that happen, the 32MHz crystal use load capacitor with value of 12pF as the same with demo board.

[paul]

Glad to hear it is now working....