LilyGo-LoRa-Series/examples/ArduinoLoRa/LoRaSender/LoRaSender.ino

// Only supports SX1276/SX1278
#include <LoRa.h>
#include "LoRaBoards.h"

int counter = 0;

void setup()
{
    setupBoards();
    // When the power is turned on, a delay is required.
    delay(1500);

#ifdef  RADIO_TCXO_ENABLE
    pinMode(RADIO_TCXO_ENABLE, OUTPUT);
    digitalWrite(RADIO_TCXO_ENABLE, HIGH);
#endif

    Serial.println("LoRa Sender");
    LoRa.setPins(RADIO_CS_PIN, RADIO_RST_PIN, RADIO_DIO0_PIN);
    if (!LoRa.begin(LORA_FREQ_CONFIG)) {
        Serial.println("Starting LoRa failed!");
        while (1);
    }
}

void loop()
{
    Serial.print("Sending packet: ");
    Serial.println(counter);

    // send packet
    LoRa.beginPacket();
    LoRa.print("hello ");
    LoRa.print(counter);
    LoRa.endPacket();

    if (u8g2) {
        char buf[256];
        u8g2->clearBuffer();
        u8g2->drawStr(0, 12, "Transmitting: OK!");
        snprintf(buf, sizeof(buf), "Sending: %d", counter);
        u8g2->drawStr(0, 30, buf);
        u8g2->sendBuffer();
    }
    counter++;
    delay(5000);
}