add wifi manager esp32 (#414)

* add wifi manager esp32
2019-06-22 13:43:54 +02:00
1 parent 1a0dacaf3f
commit feb489633b
@@ -0,0 +1,171 @@
+#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);
+  }
+
+  //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:
+
+
+}