message: adds otacallback and progress example callback for Update lib
diff: @@ -34,6 +34,21 @@ bool WMISBLOCKING = true; // use blocking or non blocking mode, non global pa
  // char ssid[] = "*************"; // your network SSID (name)
  // char pass[] = "********"; // your network password
  + // called after AP mode and config portal has started
  + // setAPCallback( std::function<void(WiFiManager*)> func );
  + // called after webserver has started
  + // setWebServerCallback( std::function<void()> func );
  + // called when settings reset have been triggered
  + // setConfigResetCallback( std::function<void()> func );
  + // called when wifi settings have been changed and connection was successful ( or setBreakAfterConfig(true) )
  + // setSaveConfigCallback( std::function<void()> func );
  + // called when saving either params-in-wifi or params page
  + // setSaveParamsCallback( std::function<void()> func );
  + // called when saving params-in-wifi or params before anything else happens (eg wifi)
  + // setPreSaveConfigCallback( std::function<void()> func );
  + // called just before doing OTA update
  + // setPreOtaUpdateCallback( std::function<void()> func );
  +
  void saveWifiCallback(){
  Serial.println("[CALLBACK] saveCallback fired");
  }
  @@ -64,6 +79,12 @@ void handleRoute(){
  wm.server->send(200, "text/plain", "hello from user code");
  }
  +void handlePreOtaUpdateCallback(){
  + Update.onProgress([](unsigned int progress, unsigned int total) {
  + Serial.printf("CUSTOM Progress: %u%%\r", (progress / (total / 100)));
  + });
  +}
  +
  void setup() {
  // WiFi.mode(WIFI_STA); // explicitly set mode, esp defaults to STA+AP
  @@ -128,6 +149,7 @@ void setup() {
  wm.setWebServerCallback(bindServerCallback);
  wm.setSaveConfigCallback(saveWifiCallback);
  wm.setSaveParamsCallback(saveParamCallback);
  + wm.setPreOtaUpdateCallback(handlePreOtaUpdateCallback);
  // add all your parameters here
  wm.addParameter(&custom_html);
  