Method send

RFM69.cpp:329–339

}

void RFM69::send(uint16_t toAddress, const void* buffer, uint8_t bufferSize, bool requestACK) {
  writeReg(REG_PACKETCONFIG2, (readReg(REG_PACKETCONFIG2) & 0xFB) | RF_PACKET2_RXRESTART); // avoid RX deadlocks
  uint32_t now = millis();
  while (!canSend() && millis() - now < RF69_CSMA_LIMIT_MS){
      receiveDone();
#ifdef ESP8266
      delay(1); // Give esp8266-based boards to handle background tasks. Seems to work better than yield();
#endif
  }
  sendFrame(toAddress, buffer, bufferSize, requestACK, false);
}

// to increase the chance of getting a packet across, call this function instead of send
// and it handles all the ACK requesting/retrying for you :)