#include <SPI.h>
#include <LoRa.h>

int counter = 0;

void setup() {
  Serial.begin(9600);
  while (!Serial);

  Serial.println("LoRa Sender non-blocking");

  if (!LoRa.begin(915E6)) {
    Serial.println("Starting LoRa failed!");
    while (1);
  }
}

void loop() {
  // wait until the radio is ready to send a packet
  while (LoRa.beginPacket() == 0) {
    Serial.print("waiting for radio ... ");
    delay(100);
  }

  Serial.print("Sending packet non-blocking: ");
  Serial.println(counter);

  // send in async / non-blocking mode
  LoRa.beginPacket();
  LoRa.print("hello ");
  LoRa.print(counter);
  LoRa.endPacket(true); // true = async / non-blocking mode

  counter++;
}