Load config to EEPROM

boil_kettle/boil_kettle.ino

@@ -2,6 +2,7 @@
 #include <Arduino.h>
 #include <SPI.h>
 #include <Ethernet.h>
+#include <EEPROM.h>
 
 // Additoinal Libraries
 #include <ArduinoJson.h>
@@ -13,6 +14,7 @@
 
 // My Includes
 #include "config.h"
+#include "eeprom_init.h"
 #include "button.h"
 #include "slowPWM.h"
 
@@ -70,6 +72,7 @@ LiquidScreen home_screen(KettleState_line, kettle_power_line);
 LiquidMenu menu(lcd);
 
 void setup() {
+  StoreEEPROM();
 
   unsigned long lastRun = millis() - UpdateInterval;
   Serial.begin(9600);

boil_kettle/eeprom_init.h

@@ -0,0 +1,66 @@
+#include <EEPROM.h>
+
+const uint8_t CompileTimeP[] PROGMEM = __DATE__ " " __TIME__;
+const size_t ConfAddress = sizeof(CompileTimeP);
+
+unsigned char b, e = -1, *p = (uint8_t*)CompileTimeP - 1;
+
+struct Vessel {
+  String name;
+  String setpoint;
+  String sensor;
+  double Rref;
+  double RNominal;
+};
+
+struct Topic {
+  String root;
+  Vessel mash;
+  Vessel boil;
+};
+
+struct Mqtt {
+  char broker[14];
+  char user[10];
+  char password[21];
+  Topic topic;
+};
+
+struct ConfigData {
+  Mqtt mqtt;
+  int interval;
+  int period;
+  uint8_t threshold;
+  uint8_t hysteresis;
+};
+
+void StoreEEPROM() {
+  while( b = pgm_read_byte( ++p ) ){
+    if( b !=  EEPROM[++e] ){
+
+      Vessel BoilKettle {"boil_kettle", BOIL_SETPOINT_TOPIC, BOIL_ACTUAL_TOPIC, RREF_KETTLE, RNOMINAL_KETTLE};
+      Vessel MashTun {"mash_tun", MASH_SETPOINT_TOPIC, MASH_ACTUAL_TOPIC, RREF_MASH, RNOMINAL_MASH};
+      Topic mqtt_topics {TOPIC_ROOT, MashTun, BoilKettle};
+      Mqtt mqtt_data;
+      strcpy(mqtt_data.broker, MQTT_BROKER);
+      strcpy(mqtt_data.user, MQTT_USER);
+      strcpy(mqtt_data.password, MQTT_PASSWORD);
+      mqtt_data.topic = mqtt_topics;
+
+
+      ConfigData conf {
+        mqtt_data,
+        UpdateInterval,
+        PeriodPWM,
+        ThreshPWR,
+        Hysteresis
+      };
+
+      EEPROM.put(ConfAddress, conf);
+      Serial.println(conf.mqtt.broker);
+
+      while( b = pgm_read_byte( p++ ) ) EEPROM[e++] = b;
+      break;
+    }
+  }
+}

boil_kettle/mqtt.ino

@@ -1,6 +1,12 @@
 void ConnectMQTT() {
-  static const char *password = MQTT_PASSWORD;
-  static const char *user = MQTT_USER;
+  ConfigData config;
+  EEPROM.get(ConfAddress, config);
+  
+  static const char *user = config.mqtt.user;
+  static const char *password = config.mqtt.password;
+  //config.mqtt.topic.root
+  //config.mqtt.broker
+
   Serial.println("connecting MQTT...");
   while (!mqtt_client.connect("brewhouse", user, password)) {
     Serial.print(".");
@@ -8,11 +14,14 @@ void ConnectMQTT() {
   }
 
   Serial.println("\nconnected!");
-  mqtt_client.subscribe("brewery/setpoint/bk");
+  
+  mqtt_client.subscribe(config.mqtt.topic.root + config.mqtt.topic.boil.setpoint);
+  mqtt_client.subscribe(config.mqtt.topic.root + config.mqtt.topic.mash.setpoint);
 }
 
 void MessageReceived(String &topic, String &payload) {
-  Serial.println("incoming: " + topic + " - " + payload);
+  ConfigData config;
+  EEPROM.get(ConfAddress, config);
 
   /** JSON Parser Setup */
   StaticJsonDocument<200> doc;
@@ -22,29 +31,20 @@ void MessageReceived(String &topic, String &payload) {
 
   // Test if parsing succeeds.
   if (error) {
-    Serial.print(F("deserializeJson() failed: "));
     Serial.println(error.f_str());
     return;
   }
-  char buf[30];
-  strcpy(buf,TOPIC_PREFIX);
-  strcat(buf,BOIL_SETPOINT_TOPIC);
-  if (topic == buf) {
+  
+  if (topic == config.mqtt.topic.root + config.mqtt.topic.boil.setpoint) {
     // Update PWM setpoint.
-    String name = doc["entity"];
     String setting = doc["setpoint"];
-
     KettleDuty = setting.toInt();
-    String unit = doc["units"];
-
-    Serial.println("Updating setpoint for " + name + " to " + setting + " " + unit);
   }
 }
 
 void SetupMQTT(const char *broker) {
   // Note: Local domain names (e.g. "Computer.local" on OSX) are not supported
   // by Arduino. You need to set the IP address directly.
-  Serial.println("Setup MQTT client.");
   mqtt_client.begin(broker, net);
   mqtt_client.onMessage(MessageReceived);
 
@@ -52,20 +52,20 @@ void SetupMQTT(const char *broker) {
 }
 
 static void SendSensorData() {
-  Serial.println("Sending data...");
-
+  ConfigData config;
+  EEPROM.get(ConfAddress, config);
   // NOTE: max message length is 250 bytes.
   StaticJsonDocument<200> doc;
 
-  doc["entity"] = "boil_kettle";
+  doc["entity"] = config.mqtt.topic.boil.name;
   doc["setpoint"] = KettleDuty;
   doc["units"] = "%";
 
   String jstr;
   serializeJson(doc, jstr);
 
-  String topic = TOPIC_PREFIX;
-  topic += "sensor/boil_kettle";
+  String topic = config.mqtt.topic.root;
+  topic += config.mqtt.topic.boil.sensor;
 
   mqtt_client.publish(topic, jstr);