#include //this needs to be first, or it all crashes and burns... #include //https://github.com/tzapu/WiFiManager #ifdef ESP32 #include #endif #include //https://github.com/bblanchon/ArduinoJson //define your default values here, if there are different values in config.json, they are overwritten. //length should be max size + 1 char mqtt_server[40]; char mqtt_port[6] = "8080"; char api_token[34] = "YOUR_APITOKEN"; //default custom static IP char static_ip[16] = "10.0.1.56"; char static_gw[16] = "10.0.1.1"; char static_sn[16] = "255.255.255.0"; //flag for saving data bool shouldSaveConfig = false; //callback notifying us of the need to save config void saveConfigCallback () { Serial.println("Should save config"); shouldSaveConfig = true; } void setup() { // put your setup code here, to run once: Serial.begin(115200); Serial.println(); //clean FS, for testing //SPIFFS.format(); //read configuration from FS json Serial.println("mounting FS..."); if (SPIFFS.begin()) { Serial.println("mounted file system"); if (SPIFFS.exists("/config.json")) { //file exists, reading and loading Serial.println("reading config file"); File configFile = SPIFFS.open("/config.json", "r"); if (configFile) { Serial.println("opened config file"); size_t size = configFile.size(); // Allocate a buffer to store contents of the file. std::unique_ptr buf(new char[size]); configFile.readBytes(buf.get(), size); #if defined(ARDUINOJSON_VERSION_MAJOR) && ARDUINOJSON_VERSION_MAJOR >= 6 DynamicJsonDocument json(1024); auto deserializeError = deserializeJson(json, buf.get()); serializeJson(json, Serial); if ( ! deserializeError ) { #else DynamicJsonBuffer jsonBuffer; JsonObject& json = jsonBuffer.parseObject(buf.get()); json.printTo(Serial); if (json.success()) { #endif Serial.println("\nparsed json"); strcpy(mqtt_server, json["mqtt_server"]); strcpy(mqtt_port, json["mqtt_port"]); strcpy(api_token, json["api_token"]); if (json["ip"]) { Serial.println("setting custom ip from config"); strcpy(static_ip, json["ip"]); strcpy(static_gw, json["gateway"]); strcpy(static_sn, json["subnet"]); Serial.println(static_ip); } else { Serial.println("no custom ip in config"); } } else { Serial.println("failed to load json config"); } } } } else { Serial.println("failed to mount FS"); } //end read Serial.println(static_ip); Serial.println(api_token); Serial.println(mqtt_server); // The extra parameters to be configured (can be either global or just in the setup) // After connecting, parameter.getValue() will get you the configured value // id/name placeholder/prompt default length WiFiManagerParameter custom_mqtt_server("server", "mqtt server", mqtt_server, 40); WiFiManagerParameter custom_mqtt_port("port", "mqtt port", mqtt_port, 5); WiFiManagerParameter custom_api_token("apikey", "API token", api_token, 34); //WiFiManager //Local intialization. Once its business is done, there is no need to keep it around WiFiManager wifiManager; //set config save notify callback wifiManager.setSaveConfigCallback(saveConfigCallback); //set static ip IPAddress _ip, _gw, _sn; _ip.fromString(static_ip); _gw.fromString(static_gw); _sn.fromString(static_sn); wifiManager.setSTAStaticIPConfig(_ip, _gw, _sn); //add all your parameters here wifiManager.addParameter(&custom_mqtt_server); wifiManager.addParameter(&custom_mqtt_port); wifiManager.addParameter(&custom_api_token); //reset settings - for testing //wifiManager.resetSettings(); //set minimu quality of signal so it ignores AP's under that quality //defaults to 8% wifiManager.setMinimumSignalQuality(); //sets timeout until configuration portal gets turned off //useful to make it all retry or go to sleep //in seconds //wifiManager.setTimeout(120); //fetches ssid and pass and tries to connect //if it does not connect it starts an access point with the specified name //here "AutoConnectAP" //and goes into a blocking loop awaiting configuration if (!wifiManager.autoConnect("AutoConnectAP", "password")) { Serial.println("failed to connect and hit timeout"); delay(3000); //reset and try again, or maybe put it to deep sleep ESP.restart(); delay(5000); } //if you get here you have connected to the WiFi Serial.println("connected...yeey :)"); //read updated parameters strcpy(mqtt_server, custom_mqtt_server.getValue()); strcpy(mqtt_port, custom_mqtt_port.getValue()); strcpy(api_token, custom_api_token.getValue()); //save the custom parameters to FS if (shouldSaveConfig) { Serial.println("saving config"); #if defined(ARDUINOJSON_VERSION_MAJOR) && ARDUINOJSON_VERSION_MAJOR >= 6 DynamicJsonDocument json(1024); #else DynamicJsonBuffer jsonBuffer; JsonObject& json = jsonBuffer.createObject(); #endif json["mqtt_server"] = mqtt_server; json["mqtt_port"] = mqtt_port; json["api_token"] = api_token; json["ip"] = WiFi.localIP().toString(); json["gateway"] = WiFi.gatewayIP().toString(); json["subnet"] = WiFi.subnetMask().toString(); File configFile = SPIFFS.open("/config.json", "w"); if (!configFile) { Serial.println("failed to open config file for writing"); } #if defined(ARDUINOJSON_VERSION_MAJOR) && ARDUINOJSON_VERSION_MAJOR >= 6 serializeJson(json, Serial); serializeJson(json, configFile); #else json.printTo(Serial); json.printTo(configFile); #endif configFile.close(); //end save } Serial.println("local ip"); Serial.println(WiFi.localIP()); Serial.println(WiFi.gatewayIP()); Serial.println(WiFi.subnetMask()); } void loop() { // put your main code here, to run repeatedly: }