Removing uart_init() from ble_app_uart example stops BLE Announcements.

Question

Hi, 
 I've been using the ble_app_uart example as a template for our use case. It is a good starting point. We don't actually need UART functionality, and we've assigned pins 5, 6, 7, 8 to GPIO usage. 
 I commented out uart_init() from main(), so it looks like: 
 /**@brief Application main function.
 */
int main(void)
{
 uint32_t err_code;
 bool erase_bonds;
 uint8_t start_string[] = START_STRING;
 
 // Initialize.
 APP_TIMER_INIT(APP_TIMER_PRESCALER, APP_TIMER_MAX_TIMERS, APP_TIMER_OP_QUEUE_SIZE, false);
 
 // uart_init();
 buttons_leds_init(&erase_bonds);
 ble_stack_init();
 gap_params_init();
 services_init();
 advertising_init();
 conn_params_init();
 
 printf("%s",start_string);

 err_code = ble_advertising_start(BLE_ADV_MODE_FAST);
 APP_ERROR_CHECK(err_code);
 
 // Enter main loop.
 for (;;)
 {
 power_manage();
 }
}
 
 However, now when I use the Android nRF UART v2.0 app and Scan for devices, the Nordic_UART device does not show up anymore, so I can't talk to the software I've written for the Nordic at all. 
 I'm not sure I understand why not initting the UART has the side effect of disabling the Bluetooth announcements? 
 Any help would be greatly appreciated. 
 Thanks,
Max

Susheel Nuguru · Accepted Answer

Most probably because your program is stuck at 
 printf("%s",start_string);
 
 If not there, then it is getting stuck somewhere else. Please compile your code with zero optimizations and run it in debugger mode to see find where the code got stuck.

Removing uart_init() from ble_app_uart example stops BLE Announcements.

Top Replies