Add ESP32 HTTP OTA

blynkkk · May 7, 2018 · 2306617 · 2306617
1 parent 15e827f
commit 2306617
Showing 1 changed file with 76 additions and 3 deletions.
diff --git a/examples/Export_Demo/Template_ESP32/OTA.h b/examples/Export_Demo/Template_ESP32/OTA.h
@@ -1,7 +1,32 @@
-/*
- * OTA is not ready for this board yet.
+/**************************************************************
+ * This is a DEMO. You can use it only for development and testing.
+ *
+ * If you would like to add these features to your product,
+ * please contact Blynk for Business:
+ *
+ *                  http://www.blynk.io/
+ *
+ **************************************************************
+ *
+ * How to trigger an OTA update?
+ *   1. In Arduino IDE menu: Sketch -> Export compiled Binary
+ *   2. Open console, navigate to the sketch directory
+ *   3.a Trigger update using HTTPS API on local server for specific hardware:
+ *       curl -v -F file=@Template_ESP8266.ino.nodemcu.bin --insecure -u admin@blynk.cc:admin https://localhost:9443/admin/ota/start?token=123
+ *   3.b Trigger update using HTTPS API on local server for all hardware:
+ *       curl -v -F file=@Template_ESP8266.ino.nodemcu.bin --insecure -u admin@blynk.cc:admin https://localhost:9443/admin/ota/start
+ *   3.c Trigger update using HTTPS API on local server for single user:
+ *       curl -v -F file=@Template_ESP8266.ino.nodemcu.bin --insecure -u admin@blynk.cc:admin https://localhost:9443/admin/ota/start?user=pupkin@gmail.com
+ *   3.d Trigger update using HTTPS API on local server for single user and specific project:
+ *       curl -v -F file=@Template_ESP8266.ino.nodemcu.bin --insecure -u admin@blynk.cc:admin https://localhost:9443/admin/ota/start?user=pupkin@gmail.com&project=123
+ * More about ESP8266 OTA updates:
+ *  https://github.com/esp8266/Arduino/blob/master/doc/ota_updates/readme.md
  */
 
+#include <WiFi.h>
+#include <Update.h>
+#include <HTTPClient.h>
+
 String overTheAirURL;
 
 BLYNK_WRITE(InternalPinOTA) {
@@ -16,6 +41,54 @@ BLYNK_WRITE(InternalPinOTA) {
 }
 
 void enterOTA() {
-  BlynkState::set(MODE_ERROR);
+  BlynkState::set(MODE_OTA_UPGRADE);
+
+  DEBUG_PRINT(String("Firmware update URL: ") + overTheAirURL);
+
+  HTTPClient http;
+  http.begin(overTheAirURL);
+
+  int httpCode = http.GET();
+  if (httpCode != HTTP_CODE_OK) {
+    DEBUG_PRINT("HTTP response should be 200");
+    BlynkState::set(MODE_ERROR);
+    return;
+  }
+  int contentLength = http.getSize();
+  if (contentLength <= 0) {
+    DEBUG_PRINT("Content-Length not defined");
+    BlynkState::set(MODE_ERROR);
+    return;
+  }
+
+  bool canBegin = Update.begin(contentLength);
+  if (!canBegin) {
+    DEBUG_PRINT("Not enough space to begin OTA");
+    BlynkState::set(MODE_ERROR);
+    return;
+  }
+
+  Client& client = http.getStream();
+  int written = Update.writeStream(client);
+  if (written != contentLength) {
+    DEBUG_PRINT(String("OTA written ") + written + " / " + contentLength + " bytes");
+    BlynkState::set(MODE_ERROR);
+    return;
+  }
+
+  if (!Update.end()) {
+    DEBUG_PRINT("Error #" + String(Update.getError()));
+    BlynkState::set(MODE_ERROR);
+    return;
+  }
+
+  if (!Update.isFinished()) {
+    DEBUG_PRINT("Update failed.");
+    BlynkState::set(MODE_ERROR);
+    return;
+  }
+
+  DEBUG_PRINT("Update successfully completed. Rebooting.");
+  ESP.restart();
 }