Function sendHEXPacket

RFM69_OTA.cpp:496–531

=================================================================================================================== sendHEXPacket() - return the SEQ of the ACK received, or -1 if invalid ===================================================================================================================

// sendHEXPacket() - return the SEQ of the ACK received, or -1 if invalid
//===================================================================================================================
uint8_t sendHEXPacket(RFM69& radio, uint16_t targetID, uint8_t* sendBuf, uint8_t hexDataLen, uint16_t seq, uint16_t TIMEOUT, uint16_t ACKTIMEOUT, uint8_t DEBUG)
{
  long now = millis();
  
  while(1) {
    if (DEBUG) { Serial.print(F("RFTX > ")); PrintHex83(sendBuf, hexDataLen); Serial.println(); }
    if (radio.sendWithRetry(targetID, sendBuf, hexDataLen, 2, ACKTIMEOUT))
    {
      uint8_t ackLen = radio.DATALEN;
      
      if (DEBUG) { Serial.print(F("RFACK > ")); Serial.print(ackLen); Serial.print(F(" > ")); PrintHex83((uint8_t*)radio.DATA, ackLen); Serial.println(); }
      
      if (ackLen >= 8 && radio.DATA[0]=='F' && radio.DATA[1]=='L' && radio.DATA[2]=='X' && 
          radio.DATA[3]==':' && radio.DATA[ackLen-3]==':' &&
          radio.DATA[ackLen-2]=='O' && radio.DATA[ackLen-1]=='K')
      {
        uint16_t tmp=0;
#if defined(__arm__)
        // On the ARM platform, uint16_t = short unsigned int, so %hu formatting is needed:
        sscanf((const char*)radio.DATA, "FLX:%hu:OK", &tmp);
#else
        // On the AVR platform, uint16_t = unsigned int, so %u formatting is needed:
        sscanf((const char*)radio.DATA, "FLX:%u:OK", &tmp);
#endif
        return tmp == seq;
      }
    }

    if (millis()-now > TIMEOUT)
    {
      Serial.println(F("Timeout waiting for packet ACK, aborting FLASH operation ..."));
      break; //abort FLASH sequence if no valid ACK was received for a long time
    }
  }
  return false;
}


//===================================================================================================================