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urmel79 avatar urmel79 commented on August 15, 2024

transmit message id as uint16_t (transfer it in high and low byte)
problem: function LoRaClass::write(uint8_t byte) can only write 8bit uint
solution: divide message id (uint16_t) in high and low byte and transmit it; receiver has to put the to bytes together again

void LoRa_sendMessage( String message ) {
  ...
  LoRa.write((uint8_t)(g_i_msgCount >> 8 ));  // add message ID (high byte)
  LoRa.write((uint8_t)g_i_msgCount );         // add message ID (low byte)
  ...
}
void onReceive(int packetSize) {
  ...
  g_i_incomingMsgId = LoRa.read();
  g_i_incomingMsgId = ( g_i_incomingMsgId << 8 ) + LoRa.read();
  ...
}

from io_esp8266_oled_gps_lora_gh.

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