APP_UART_COMMUNICATION_ERROR on handle

Question

I'm having troubles parsing the received data stream form an UART device. If i just print whatever i received from the datastream, everything works just fine. 
 if (p_event->evt_type == APP_UART_DATA_READY){
 app_uart_get(&rx);
 NRF_LOG_RAW_INFO("%c", rx);
 NRF_LOG_FLUSH();
 } 
 Howeve, if i try to store it in an external string and then print it , it returns APP_UART_COMMUNICATION_ERROR during reception. 
 if (p_event->evt_type == APP_UART_DATA_READY){
 app_uart_get(&rx);
 if(rx == 0xD){
 buff[i] = (uint8_t)'\0';
 i = 0;
 NRF_LOG_RAW_INFO("%s", NRF_LOG_PUSH((char *)buff));
 NRF_LOG_FLUSH();
 }else{
 buff[i++] = rx;
 }
 }

Karl Ylvisaker · Accepted Answer

Hi, Could you tell me what the value of the event's error_communication is? It contains the value of the ERRORSRC register, which will give us a clearer picture of what is going on. As Awneil suggests it might very well be that your RX buffer overflows, such as if app_uart_get() is not called often enough. Best regards, Karl

diocorreia · Answer

Found a solution based on https://devzone.nordicsemi.com/f/nordic-q-a/38816/uart-event-handler-problems/150013#150013 . Using a scheduler to handle the received characters solved my problem.

APP_UART_COMMUNICATION_ERROR on handle

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