Create LoRaSenderNonBlockingCallback.ino

Simple Example non-blocking callback

examples/LoRaSenderNonBlockingCallback/LoRaSenderNonBlockingCallback.ino

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+#include <SPI.h>
+#include <LoRa.h>
+
+int counter = 0;
+
+void setup() {
+  Serial.begin(9600);
+  while (!Serial);
+
+  Serial.println("LoRa Sender non-blocking Callback");
+
+  if (!LoRa.begin(915E6)) {
+    Serial.println("Starting LoRa failed!");
+    while (1);
+  }
+
+  LoRa.onTxDone(onTxDone);
+}
+
+void loop() {
+  if (runEvery(1000)) { // repeat every 1000 millis
+
+    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++;
+  }
+}
+
+void onTxDone() {
+  Serial.println("TxDone");
+}
+
+boolean runEvery(unsigned long interval)
+{
+  static unsigned long previousMillis = 0;
+  unsigned long currentMillis = millis();
+  if (currentMillis - previousMillis >= interval)
+  {
+    previousMillis = currentMillis;
+    return true;
+  }
+  return false;
+}