Merge pull request #12 from arduino-libraries/nano_esp32

Arduino NANO ESP32 support

Author: pennam

.github/workflows/compile-examples.yml

@@ -37,6 +37,8 @@ jobs:
         board:
           - fqbn: "esp32:esp32:esp32"
             type: esp32
+          - fqbn: "arduino:esp32:nano_nora"
+            type: arduino_esp32
 
         include:
           - board:
@@ -46,6 +48,18 @@ jobs:
                 source-url: https://raw.githubusercontent.com/espressif/arduino-esp32/gh-pages/package_esp32_index.json
             libraries: |
               - name: Arduino_DebugUtils
+            sketch-paths: |
+              - examples/OTA
+              - examples/LOLIN_32_Blink
+          - board:
+              type: arduino_esp32
+            platforms: |
+              - name: arduino:esp32
+            libraries: |
+              - name: Arduino_DebugUtils
+            sketch-paths: |
+              - examples/OTA
+              - examples/NANO_ESP32_Blink
 
     steps:
       - name: Checkout
@@ -66,7 +80,7 @@ jobs:
             - source-path: ./
             ${{ matrix.libraries }}
           sketch-paths: |
-            - examples
+            ${{ matrix.sketch-paths }}
           enable-deltas-report: true
           sketches-report-path: ${{ env.SKETCHES_REPORTS_PATH }}
 

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);
+}

examples/OTA/OTA.ino

@@ -36,7 +36,12 @@
 static char const SSID[] = SECRET_SSID;  /* your network SSID (name) */
 static char const PASS[] = SECRET_PASS;  /* your network password (use for WPA, or use as key for WEP) */
 
+
+#if defined(ARDUINO_NANO_ESP32)
+static char const OTA_FILE_LOCATION[] = "https://downloads.arduino.cc/ota/NANO_ESP32_Blink.ino.ota";
+#else
 static char const OTA_FILE_LOCATION[] = "https://downloads.arduino.cc/ota/LOLIN_32_Blink.ino.ota";
+#endif
 
 /******************************************************************************
  * SETUP/LOOP
@@ -95,7 +100,11 @@ void setup()
   }
 
   Serial.println("Performing a reset after which the bootloader will start the new firmware.");
+#if defined(ARDUINO_NANO_ESP32)
+  Serial.println("Hint: Arduino NANO ESP32 will blink Red Green and Blue.");
+#else
   Serial.println("Hint: LOLIN32 will blink Blue.");
+#endif
   delay(1000); /* Make sure the serial message gets out before the reset. */
   ota.reset();
 }

src/Arduino_ESP32_OTA.cpp

@@ -189,7 +189,7 @@ int Arduino_ESP32_OTA::download(const char * ota_url)
     return static_cast<int>(Error::OtaHeaderLength);
   }
 
-  if (_ota_header.header.magic_number != 0x45535033)
+  if (_ota_header.header.magic_number != ARDUINO_ESP32_OTA_MAGIC)
   {
     return static_cast<int>(Error::OtaHeaterMagicNumber);
   }

src/Arduino_ESP32_OTA.h

@@ -26,6 +26,14 @@
 #include <WiFiClientSecure.h>
 #include "decompress/utility.h"
 
+/******************************************************************************
+   DEFINES
+ ******************************************************************************/
+#if defined (ARDUINO_NANO_ESP32)
+  #define ARDUINO_ESP32_OTA_MAGIC 0x23410070
+#else
+  #define ARDUINO_ESP32_OTA_MAGIC 0x45535033
+#endif
 /******************************************************************************
    CONSTANTS
  ******************************************************************************/