NRF52832 questions

[Ibery]

Hi I am new to NRF52832. I am using SDK 16, Multlink Central (ble_app_multilink_central).

Here are my questions:

1) The software keep resetting when I flashed the code to the device. But if I use J-Link emulator, it doesn't reset, everything is fine. I then disabled the idle_state_handle(); statement and try again, it won't reset but the  NRF_LOG_INFO thru serial port can not be displayed on the PC anymore. Why?

2) I added:

if (sd_ble_gap_tx_power_set(BLE_GAP_TX_POWER_ROLE_SCAN_INIT,0,-40)==NRF_SUCCESS) 
{ NRF_LOG_INFO("Transmit power adjusted successfully..."); }
else
{ NRF_LOG_INFO("Transmit power adjust failed..."); }

before the 

advertising_start();

I don't think it has any effect. Why ?

3) I use the nRF Connect App and add the same bluetooth ID for the Adveriser on the mobile App, the Multilink Central cannot recognize the mobile App. Why?

4) When I copy the timer codes from timer example to the Multi-Link Central, it stop and generate Fatal error when running. Compile is ok.

Anyone please help?

 

[Einar Thorsrud]

Hi,

1). How have you verified that the device resets when not having a debugger connected? The ble_app_multilink_central examples process logs in idle_state_handle(). Therefore it is expected that you do not see any logs if you do not call it. If you do not want to process logs in the idle_state_handle(), but want to process them immediately instead, you should set NRF_LOG_DEFERRED to 0 in the projects sdk_config.h.

2) BLE_GAP_TX_POWER_ROLE_SCAN_INIT will not affect the Tx power when advertising. For that, you must use BLE_GAP_TX_POWER_ROLE_ADV.

3) The example scans for devices with the name "Nordic_Blinky", and will only connect if such a device is found. If you want to filter on something else, you should modify the filter configuration in scan_init().

4) Please build a debug build (by selecting "Debug" from the build configuration dropdown if using SES, or defining DEBUG as a preprocessor symbol if usign another toolchain). Then you will get a log output specifying details about the error (filename, line number and error code).

[Ibery]

Thanks for your reply. When I connected to the debugger, the program runs correctly. If I pull the USB cable of the debugger out, the board just keep resetting. I am check the reset and watchdog now. May be it is hardware problem.

Thanks for your help.