ESP32_ChinaDieselHeater_Con.../lib/WiFiManager-dev/examples/AutoConnect/AutoConnectWithFSParameters/AutoConnectWithFSParameters.ino

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#include <FS.h> // this needs to be first, or it all crashes and burns...
#include <WiFiManager.h> // https://github.com/tzapu/WiFiManager
#include <ArduinoJson.h> // https://github.com/bblanchon/ArduinoJson
#ifdef ESP32
#include <SPIFFS.h>
#endif
//define your default values here, if there are different values in config.json, they are overwritten.
char mqtt_server[40];
char mqtt_port[6] = "8080";
char api_token[32] = "YOUR_API_TOKEN";
//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 setupSpiffs(){
//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<char[]> buf(new char[size]);
configFile.readBytes(buf.get(), size);
DynamicJsonBuffer jsonBuffer;
JsonObject& json = jsonBuffer.parseObject(buf.get());
json.printTo(Serial);
if (json.success()) {
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
}
void setup() {
// put your setup code here, to run once:
Serial.begin(115200);
Serial.println();
setupSpiffs();
// WiFiManager, Local intialization. Once its business is done, there is no need to keep it around
WiFiManager wm;
//set config save notify callback
wm.setSaveConfigCallback(saveConfigCallback);
// setup custom parameters
//
// 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, 6);
WiFiManagerParameter custom_api_token("api", "api token", "", 32);
//add all your parameters here
wm.addParameter(&custom_mqtt_server);
wm.addParameter(&custom_mqtt_port);
wm.addParameter(&custom_api_token);
// set static ip
// IPAddress _ip,_gw,_sn;
// _ip.fromString(static_ip);
// _gw.fromString(static_gw);
// _sn.fromString(static_sn);
// wm.setSTAStaticIPConfig(_ip, _gw, _sn);
//reset settings - wipe credentials for testing
//wm.resetSettings();
//automatically connect using saved credentials if they exist
//If connection fails it starts an access point with the specified name
//here "AutoConnectAP" if empty will auto generate basedcon chipid, if password is blank it will be anonymous
//and goes into a blocking loop awaiting configuration
if (!wm.autoConnect("AutoConnectAP", "password")) {
Serial.println("failed to connect and hit timeout");
delay(3000);
// if we still have not connected restart and try all over again
ESP.restart();
delay(5000);
}
// always start configportal for a little while
// wm.setConfigPortalTimeout(60);
// wm.startConfigPortal("AutoConnectAP","password");
//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");
DynamicJsonBuffer jsonBuffer;
JsonObject& json = jsonBuffer.createObject();
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");
}
json.prettyPrintTo(Serial);
json.printTo(configFile);
configFile.close();
//end save
shouldSaveConfig = false;
}
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:
}