/** * IotWebConf05Callbacks.ino -- IotWebConf is an ESP8266/ESP32 * non blocking WiFi/AP web configuration library for Arduino. * https://github.com/prampec/IotWebConf * * Copyright (C) 2018 Balazs Kelemen * * This software may be modified and distributed under the terms * of the MIT license. See the LICENSE file for details. */ /** * Example: Callbacks * Description: * This example shows, what callbacks IotWebConf provides. * (See previous examples for more details!) * * Hardware setup for this example: * - An LED is attached to LED_BUILTIN pin with setup On=LOW. * - [Optional] A push button is attached to pin D2, the other leg of the * button should be attached to GND. */ #include // -- Initial name of the Thing. Used e.g. as SSID of the own Access Point. const char thingName[] = "testThing"; // -- Initial password to connect to the Thing, when it creates an own Access Point. const char wifiInitialApPassword[] = "smrtTHNG8266"; #define STRING_LEN 128 // -- Configuration specific key. The value should be modified if config structure was changed. #define CONFIG_VERSION "dem3" // -- When CONFIG_PIN is pulled to ground on startup, the Thing will use the initial // password to buld an AP. (E.g. in case of lost password) #define CONFIG_PIN D2 // -- Status indicator pin. // First it will light up (kept LOW), on Wifi connection it will blink, // when connected to the Wifi it will turn off (kept HIGH). #define STATUS_PIN LED_BUILTIN // -- Callback method declarations. void wifiConnected(); void configSaved(); boolean formValidator(); void messageReceived(String &topic, String &payload); DNSServer dnsServer; WebServer server(80); HTTPUpdateServer httpUpdater; char stringParamValue[STRING_LEN]; IotWebConf iotWebConf(thingName, &dnsServer, &server, wifiInitialApPassword, CONFIG_VERSION); IotWebConfParameter stringParam = IotWebConfParameter("String param", "stringParam", stringParamValue, STRING_LEN); void setup() { Serial.begin(115200); Serial.println(); Serial.println("Starting up..."); iotWebConf.setStatusPin(STATUS_PIN); iotWebConf.setConfigPin(CONFIG_PIN); iotWebConf.addParameter(&stringParam); iotWebConf.setConfigSavedCallback(&configSaved); iotWebConf.setFormValidator(&formValidator); iotWebConf.setWifiConnectionCallback(&wifiConnected); // -- Initializing the configuration. boolean validConfig = iotWebConf.init(); if (!validConfig) { stringParamValue[0] = '\0'; } // -- Set up required URL handlers on the web server. server.on("/", handleRoot); server.on("/config", []{ iotWebConf.handleConfig(); }); server.onNotFound([](){ iotWebConf.handleNotFound(); }); Serial.println("Ready."); } void loop() { // -- doLoop should be called as frequently as possible. iotWebConf.doLoop(); } /** * Handle web requests to "/" path. */ void handleRoot() { // -- Let IotWebConf test and handle captive portal requests. if (iotWebConf.handleCaptivePortal()) { // -- Captive portal request were already served. return; } String s = ""; s += "IotWebConf 05 CallbacksHello world!"; s += ""; s += "Go to configure page to change values."; s += "\n"; server.send(200, "text/html", s); } void wifiConnected() { Serial.println("WiFi was connected."); } void configSaved() { Serial.println("Configuration was updated."); } boolean formValidator() { Serial.println("Validating form."); boolean valid = true; int l = server.arg(stringParam.getId()).length(); if (l < 3) { stringParam.errorMessage = "Please provide at least 3 characters for this test!"; valid = false; } return valid; }