Add Blink Example for NANO ESP32

Author: pennam

examples/NANO_ESP32_Blink/NANO_ESP32_Blink.ino

@@ -0,0 +1,56 @@
+/*
+ * Blink for Arduino NANO ESP32 board
+ *
+ * This sketch can be used to generate an example binary that can be uploaded to ESP32 via OTA.
+ * It needs to be used together with OTA.ino
+ *
+ * Steps to test OTA:
+ *   1) Upload this sketch or any other sketch (this one this one lights up the RGB LED with different colours).
+ *   2) In the IDE select: Sketch -> Export compiled Binary
+ *   3) Upload the exported binary to a server
+ *   4) Open the related OTA.ino sketch and eventually update the OTA_FILE_LOCATION
+ *   5) Upload the sketch OTA.ino to perform OTA
+ */
+
+void setLed(int blue, int gree, int red) {
+  if (blue == 1) {
+    digitalWrite(LED_BLUE, LOW);
+  }
+  else {
+    digitalWrite(LED_BLUE, HIGH);
+  }
+
+  if (gree == 1) {
+    digitalWrite(LED_GREEN, LOW);
+  }
+  else {
+    digitalWrite(LED_GREEN, HIGH);
+  }
+
+  if (red == 1) {
+    digitalWrite(LED_RED, LOW);
+  }
+  else {
+    digitalWrite(LED_RED, HIGH);
+  }
+}
+
+
+void setup()
+{
+  pinMode(LED_BLUE, OUTPUT);
+  pinMode(LED_GREEN, OUTPUT);
+  pinMode(LED_RED, OUTPUT);
+}
+
+void loop()
+{ // Blue LED on
+  setLed(1, 0, 0);
+  delay(1000);
+  // Green LED on
+  setLed(0, 1, 0);
+  delay(1000);
+  // Red LED on
+  setLed(0, 0, 1);
+  delay(1000);
+}