LoRa

RAK811 LoRa Tracker

Power on for LoRa chip:

pinMode(RADIO_XTAL_EN, OUTPUT);//Power LoRa moduledigitalWrite(RADIO_XTAL_EN, HIGH);

External antenna receiving and transmitting state switching pin configuration:

Receive state:

pinMode(RADIO_RF_CRX_RX, OUTPUT);digitalWrite(RADIO_RF_CRX_RX, HIGH);//control LoRa work to receivepinMode(RADIO_RF_CTX_PA, OUTPUT);digitalWrite(RADIO_RF_CTX_PA, LOW);

Transmit state:

  pinMode(RADIO_RF_CRX_RX, OUTPUT);    digitalWrite(RADIO_RF_CRX_RX, LOW);    pinMode(RADIO_RF_CTX_PA,OUTPUT);    digitalWrite(RADIO_RF_CTX_PA, HIGH);  //control LoRa send by PA_BOOST