Save MQTT config into EEPROM

WifiControlSensor/EEPROM.ino

@@ -1,14 +1,14 @@
 /*  EEPROM LAYOUT
-                  "BOOTMODE;SSID;PASSWORD;HOSTNAME;"
+                  "BOOTMODE;SSID;PASSWORD;HOSTNAME;MQTT_SERVER;MQTT_USERNAME;MQTT_PASSWD"
     BOOTMODE could be 0 for Setup, 1 for normal use, 2 for OTA
     Setup mode is trigger by setting GPIO3 to ground or at first boot
 */
 
 
-int saveConfig(int bootMode, String ssid, String password, String host ) {
+int saveConfig(int bootMode, String ssid, String password, String host, String mqttServer, String mqttUser, String mqttpasswd) {
   String eeprom;
 
-  eeprom = String(bootMode) + ";" + ssid + ";" + password + ";" + host + ";";
+  eeprom = String(bootMode) + ";" + ssid + ";" + password + ";" + host + ";" + mqttServer +  ";" + mqttUser + ";" + mqttpasswd +";";
 
   if (eeprom.length() > EEPROM_SIZE )
     return -EMSGSIZE;
@@ -32,7 +32,20 @@ int saveBootMode(int bootMode){
   return 0;
 }
 
-void readEEPROM(int &bootMode, char **ssid, char **password, char **host) {
+void readConfElement(char** element, int &i) {
+  *element = &eeprom[i];
+  do {
+    eeprom[i] = EEPROM.read(i);
+    i++;
+  } while (i < EEPROM_SIZE && eeprom[i - 1] != ';');
+  eeprom[i - 1] = '\0';
+
+  if(i == EEPROM_SIZE)
+    **element = '\0';
+
+}
+
+void readEEPROM(int &bootMode, char **ssid, char **password, char **host, char **mqttServer, char **mqttUser, char **mqttPasswd) {
 
   int i = 2;
 
@@ -48,28 +61,10 @@ void readEEPROM(int &bootMode, char **ssid, char **password, char **host) {
     return;
   }
 
-  //Read SSID
+  readConfElement(ssid, i);
-  *ssid = &eeprom[2];
+  readConfElement(password, i);
-  do {
+  readConfElement(host, i);
-    eeprom[i] = EEPROM.read(i);
+  readConfElement(mqttServer, i);
-    i++;
+  readConfElement(mqttUser, i);
-  } while (i < EEPROM_SIZE && eeprom[i - 1] != ';');
+  readConfElement(mqttPasswd, i);
-  eeprom[i - 1] = '\0';
-
-  //Read password
-  *password = &eeprom[i];
-  do {
-    eeprom[i] = EEPROM.read(i);
-    i++;
-  } while (i < EEPROM_SIZE && eeprom[i - 1] != ';');
-  eeprom[i - 1] = '\0';
-
-  //Read HostName
-  *host = &eeprom[i];
-  do {
-    eeprom[i] = EEPROM.read(i);
-    i++;
-  } while (i < EEPROM_SIZE && eeprom[i - 1] != ';');
-  eeprom[i - 1] = '\0';
-
 }

WifiControlSensor/MQTT.ino

@@ -1,18 +1,46 @@
+// Create an ESP8266 WiFiClient class to connect to the MQTT server.
+WiFiClient client;
+Adafruit_MQTT_Client *mqtt;
+Adafruit_MQTT_Publish *mqtt_temp;
+
+const char TEMPERATURE_FEED[] = "/feeds/temperature";
+
+boolean mqttIsConfigured;
+
+int publishMQTT(int temp) {
+  if (MQTT_connect() == 0) {
+    Serial.println("publishing !");
+    mqtt_temp->publish(temp);
+  }
+}
+
+int setupMQTT(char *server, char *user, char *passwd) {
+
+  if(server == ""){
+    Serial.println("Mqtt Server not configured");
+  }
+  // Setup the MQTT client class by passing in the WiFi client and MQTT server and login details.
+  mqtt = new Adafruit_MQTT_Client(&client, server, 1883, user, passwd);
+  mqtt_temp =  new Adafruit_MQTT_Publish(mqtt, TEMPERATURE_FEED);
+
+  return 0;
+}
+
 // Function to connect and reconnect as necessary to the MQTT server.
 // Should be called in the loop function and it will take care if connecting.
 int MQTT_connect() {
   int8_t ret;
 
   // Stop if already connected.
-  if (mqtt.connected()) {
+  if (mqtt->connected()) {
     return 0;
   }
 
   uint8_t retries = 3;
-  while ((ret = mqtt.connect()) != 0) { // connect will return 0 for connected
+  while ((ret = mqtt->connect()) != 0) { // connect will return 0 for connected
-    Serial.println(mqtt.connectErrorString(ret));
+    Serial.println(mqtt->connectErrorString(ret));
     Serial.println("Retrying MQTT connection ...");
-    mqtt.disconnect();
+    mqtt->disconnect();
     delay(100);  // wait
     retries--;
     if (retries == 0) {

WifiControlSensor/WebServer.ino

@@ -13,6 +13,9 @@ void handleSetup() {
               "<div><label for=\"ssid\">Wifi SSID :</label> <input type=\"text\" name=\"ssid\" /></div>"
               "<div><label for=\"password\">Wifi Password :</label><input type=\"password\" name=\"password\" /> </div>"
               "<div><label for=\"host\">Hostname :</label><input type=\"text\" name=\"host\" /> </div>"
+              "<div><label for=\"host\">MQTTServer :</label><input type=\"text\" name=\"mqttServer\" /> </div>"
+              "<div><label for=\"host\">MQTTUsername :</label><input type=\"text\" name=\"mqttUser\" /> </div>"
+              "<div><label for=\"host\">MQTTPassword :</label><input type=\"text\" name=\"mqttPasswd\" /> </div>"
               "<div class=\"button\"> <button type=\"submit\">Save</button></div>"
               "</form>");
 }
@@ -32,13 +35,16 @@ void handleSave() {
   String password;
   String ssid;
   String hostName;
+  String mqttServer;
+  String mqttUser;
+  String mqttPasswd;
 
-  if (!server.hasArg("ssid") || !server.hasArg("password") || !server.hasArg("host")) {
+  if (!server.hasArg("ssid") || !server.hasArg("password") || !server.hasArg("host") || !server.hasArg("mqttServer") || !server.hasArg("mqttUser") || !server.hasArg("mqttPasswd")  ) {
     server.send(500, "text/plain", "Bad arguments\r\n");
     return;
   }
 
-  if (saveConfig(BOOTMODE_NORMAL, server.arg("ssid"), server.arg("password"), server.arg("host")) < 0) {
+  if (saveConfig(BOOTMODE_NORMAL, server.arg("ssid"), server.arg("password"), server.arg("host"), server.arg("mqttServer"), server.arg("mqttUser"), server.arg("mqttPasswd")) < 0) {
     server.send(500, "text/plain", "Cannot Save Credentials (Too long ?Contains \";\"?)\r\n");
     return;
   }

WifiControlSensor/WifiControlSensor.ino

@@ -26,18 +26,13 @@
 #include "Adafruit_MQTT.h"
 #include "Adafruit_MQTT_Client.h"
 
-#define AIO_SERVER      "192.168.0.250"
-#define AIO_SERVERPORT  1883                   // use 8883 for SSL
-#define AIO_USERNAME    ""
-#define AIO_PASSWORD    ""
-
 //#define ENABLE_EXTRA_GPIO
 
-#define EEPROM_SIZE 512
+#define EEPROM_SIZE 1024
 char eeprom[EEPROM_SIZE];
 
 #define WEB_DELAY_MS 100
-#define SAMPLING_PERIODE_MS 60000
+#define SAMPLING_PERIODE_MS 6000
 
 /* I2C pin used*/
 #define SDA 2
@@ -50,21 +45,6 @@ char eeprom[EEPROM_SIZE];
 double temp;
 int mode;
 
-// Store the MQTT server, username, and password in flash memory.
-// This is required for using the Adafruit MQTT library.
-const char MQTT_SERVER[] PROGMEM    = AIO_SERVER;
-const char MQTT_USERNAME[] PROGMEM  = AIO_USERNAME;
-const char MQTT_PASSWORD[] PROGMEM  = AIO_PASSWORD;
-
-// Create an ESP8266 WiFiClient class to connect to the MQTT server.
-WiFiClient client;
-
-// Setup the MQTT client class by passing in the WiFi client and MQTT server and login details.
-Adafruit_MQTT_Client mqtt(&client, MQTT_SERVER, AIO_SERVERPORT, MQTT_USERNAME, MQTT_PASSWORD);
-
-const char TEMPERATURE_FEED[] PROGMEM = "/feeds/temperature";
-Adafruit_MQTT_Publish mqtt_temp = Adafruit_MQTT_Publish(&mqtt, TEMPERATURE_FEED);
-
 /* Set these to your desired credentials. */
 const char *ssid = "ESPConfigurator";
 
@@ -81,15 +61,16 @@ void handleNotFound();
 void setupWebServer(int bootmode);
 
 /* EEPROM decl */
-int saveConfig(int bootMode, String ssid, String password, String host );
+int saveConfig(int bootMode, String ssid, String password, String host, String mqttServer, String mqttUser, String mqttpasswd);
 int saveBootMode(int bootMode);
-void readEEPROM(int &bootMode, char **ssid, char **password, char **host);
+void readEEPROM(int &bootMode, char **ssid, char **password, char **host, char **mqttServer, char **mqttUser, char **mqttPasswd);
-
 /* BMP180 decl */
 int getTemperature(double &t);
 
 /* MQTT decl */
 int MQTT_connect();
+int setupMQTT(char *server, char *user, char *passwd);
+int publishMQTT(int temp);
 
 void setupWifi(int bootmode, int forceSetup, char *confSsid, char *confPassword, char *confHost) {
   IPAddress myIP;
@@ -134,7 +115,7 @@ void setupOTA() {
 
   //Disable OTA mode to avoid forever loop
   //Force BOOTMODE_SETUP in case eeprom layout have changed
-  saveConfig(BOOTMODE_SETUP, "", "", "" );
+  saveConfig(BOOTMODE_SETUP, "", "", "", "", "", "" );
 
   ArduinoOTA.onStart([]() {
     Serial.println("Start");
@@ -167,6 +148,9 @@ void setup() {
   char *confSsid;
   char *confPassword;
   char *confHost;
+  char *mqttServer;
+  char *mqttUser;
+  char *mqttPasswd;
 
   delay(1000);
   Serial.begin(115200);
@@ -181,13 +165,16 @@ void setup() {
 #endif
 
   EEPROM.begin(EEPROM_SIZE);
-  readEEPROM(mode, &confSsid, &confPassword, &confHost);
+  readEEPROM(mode, &confSsid, &confPassword, &confHost, &mqttServer, &mqttUser, &mqttPasswd);
   if (mode == BOOTMODE_NORMAL || mode == BOOTMODE_OTA) {
     Serial.println("Configuration Found !:");
     Serial.println(mode);
     Serial.println(confSsid);
     Serial.println(confPassword);
     Serial.println(confHost);
+    Serial.println(mqttServer);
+    Serial.println(mqttUser);
+    Serial.println(mqttPasswd);
     Serial.println();
   } else {
     Serial.println("No configuration saved");
@@ -198,6 +185,7 @@ void setup() {
   Serial.println();
 
   setupWifi(mode, txStatus == 0, confSsid, confPassword, confHost);
+  setupMQTT(mqttServer, mqttUser, mqttPasswd);
 
   if (mode == BOOTMODE_OTA) {
     setupOTA();
@@ -218,12 +206,9 @@ void loop() {
     nbCycle++;
     if (nbCycle > SAMPLING_PERIODE_MS / WEB_DELAY_MS) {
       if (getTemperature(temp) == 0) {
-        Serial.print("Sampling :");
+        Serial.print("Current T°C ");
         Serial.println(temp);
-        if (MQTT_connect() == 0){
+        publishMQTT(temp);
-          Serial.println("publishing !");
-          mqtt_temp.publish(temp);
-        }
       } else {
         Serial.println("Cannot get T°C");
       }