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- // pre compiletime config
- //#define DEBUG_VERBOSE
- #define SPIFFS_DBG
- #define SPIFFS_USE_MAGIC
- #define FIRMWARE_NAME "WiFiThermostat"
- #define VERSION "0.1.2"
- #define COPYRIGHT " by Flo Kra"
- // default values, can later be overridden via configuration
- #define DEVICE_NAME "WiFi-Thermostat-1"
- #define MQTT_SERVER "10.1.1.11"
- #define MQTT_PORT 1883
- #define MQTT_TOPIC_IN "Test/Thermostat/cmd"
- #define MQTT_TOPIC_OUT "Test/Thermostat/status"
- #define BUTTON_DEBOUNCE_TIME 120
- #define BUTTON_HOLD_TIME 750
- #define DOMOTICZ_IN_TOPIC "domoticz/in"
- #define DOMOTICZ_OUT_TOPIC "domoticz/out"
- #define OUTTEMP_TOPIC_IN "wetter/atemp"
- #define OUTHUM_TOPIC_IN "wetter/ahum"
- #define CLEARCONF_TOKEN "TUES"
- // pin assignments and I2C addresses
- #define PIN_DHTSENSOR 13
- #define PIN_RELAIS 16
- #define PIN_BUTTON_PLUS 2
- #define PIN_BUTTON_MINUS 0
- #define PIN_BUTTON_MODE 14
- #define PIN_PIRSENSOR 12
- #define DHTTYPE DHT22 // DHT sensor type
- #define LCDADDR 0x27 // I2C address LCD
- #define LCDCOLS 16
- #define LCDLINES 2
- // default logic levels
- #define RELAISONSTATE LOW
- #define BUTTONONSTATE LOW
- #include "PersWiFiManager.h"
- #include <ArduinoJson.h>
- #include <ESP8266WiFi.h>
- #include <WiFiClient.h>
- #include <ESP8266WebServer.h>
- #include <ESP8266mDNS.h>
- #include <ESP8266HTTPUpdateServer.h>
- #include "PubSubClient.h"
- #include <DNSServer.h>
- #include <FS.h>
- #include <Wire.h>
- #include "LiquidCrystal_I2C.h"
- #include "DHT.h"
- #ifndef MESSZ
- #define MESSZ 405 // Max number of characters in JSON message string (4 x DS18x20 sensors)
- #endif
- // Max message size calculated by PubSubClient is (MQTT_MAX_PACKET_SIZE < 5 + 2 + strlen(topic) + plength)
- #if (MQTT_MAX_PACKET_SIZE -TOPSZ -7) < MESSZ // If the max message size is too small, throw an error at compile time
- // See pubsubclient.c line 359
- #error "MQTT_MAX_PACKET_SIZE is too small in libraries/PubSubClient/src/PubSubClient.h, increase it to at least 512"
- #endif
- // config variables - do not change here!
- //conf
- char deviceName[31]; // device name - just for web interface
- char http_user[31];
- char http_pass[31];
- char mqtt_server[41];
- int mqtt_port = MQTT_PORT;
- char mqtt_user[31];
- char mqtt_pass[31];
- char mqtt_topic_in[51]; // MQTT in topic for commands
- char mqtt_topic_out[51]; // MQTT out base topic, will be extended by various value names
- boolean mqtt_outRetain = false; // send MQTT out with retain flag
- char mqtt_willTopic[51]; // MQTT Last Will topic
- int mqtt_willQos = 2; // MQTT Last Will topic QOS
- boolean mqtt_willRetain = false; // MQTT Last Will retain
- char mqtt_willMsg[31]; // MQTT Last Will payload
- char domoticz_out_topic[55]; // domoticz out topic to subscribe to (only applicable if domoticzIdx_Thermostat and/or domoticzIdx_ThermostatMode is set to >0)
- //conf2
- int domoticzIdx_Thermostat = 0;
- int domoticzIdx_ThermostatMode = 0;
- int domoticzIdx_TempHumSensor = 0;
- int domoticzIdx_PIR = 0;
- char outTemp_topic_in[51];
- char outHum_topic_in[51];
- boolean autoSaveSetTemp = true;
- boolean autoSaveHeatingMode = true;
- int heatingMinOffTime = 10; // minimal time the heating keeps turned off in s
- float setTempMin = 14.0; // minimal temperature that can be set
- float setTempMax = 29.0; // maximal temperature that can be set
- float setTempLow = 18.0; // set temperature in night/low mode
- float hysteresis = 0.5;
- float tempCorrVal = 0.0; // correction value for temperature sensor reading
- int humCorrVal = 0; // correction value for humidity sensor reading
- int measureInterval = 15; // interval for temp/hum measurement
- int displayInterval = 5; //
- int displayTimeout = 120;
- //set values
- float setTemp = 21.5;
- byte heatingMode = 1; // 0 = off, 1 = normal/day, 2 = night/reduction
- float setTempSaved;
- byte heatingModeSaved; // 0 = off, 1 = normal/day, 2 = night/reduction
- // not changeable via configuration
- float setTempLowMin = 14.0;
- float setTempLowMax = 19.0;
- boolean debug = true;
- int debounceTime = BUTTON_DEBOUNCE_TIME;
- int buttonHoldTime = BUTTON_HOLD_TIME;
- // global variables
- float currTemp; // last reading from DHT sensor
- float currTemp_raw; // last reading from DHT sensor
- int currHum; // last reading from DHT sensor
- int currHum_raw; // last reading from DHT sensor
- bool turnHeatingOn = false; // true if heating is active (relais switched on)
- unsigned long heatingLastOnMillis; // last time heating was switched on
- unsigned long heatingLastOffMillis; // last time heating was switched off
- float outTemp; // outside temp (via MQTT if enabled and in-topic configured)
- int outHum; // outside temp (via MQTT if enabled and in-topic configured)
- long outTempHumLastUpdate; // last reading from out temp/hum source
- byte whichTempToDisplay; // 1=temp inside (from DHT sensor), 2= temp outside (via MQTT) - if out temp/hum available this value and the displayed value pair toggles with every displayInterval
- unsigned long lastMeasure = 0; // millis of last temp/hum measurement
- unsigned long lastDisplayUpdate = 0; // millis of last display update
- unsigned long lastDisplayToggle = 0; // millis of last display toggle
- unsigned long lastTempUpdate = 0; // last update time of DHT reading
- char msg[50]; // buffer MQTT in payload
- char topic[50]; // buffer MQTT in topic
- bool displayActive = false; // gets true when button is pressed. display light gets switched on until timeout. button actions are only performed while display is active
- unsigned long heatingOnTime, heatingOffTime;
- boolean useDomoticz = false; // will be set to true in setup() if idx-values other than 0 are configured
- boolean domoticzOutParseData = false; // indicates that domoticz/out json data is buffered, will then be parsed in next loop() run
- boolean domoticzOutParserBusy = false; // indicates that domoticz/out json data is currently processed - no futher data will be accepted until finished
- char domoticzOutPayload[450]; // buffer for domoticz/out data
- int dismissUpdateFromDomoticzTimeout = 2500; // after a value was changed by data from domoticz/out, domoticz/out parsing for this device will be turned off for this time to prevent infinite loops
- unsigned long lastUpdate_setTemp = 0; // set to millis() every time setTemp value is changed. next update from domoticz/out will be rejected for dismissUpdateFromDomoticzTimeout in this case
- unsigned long lastUpdate_heatingMode = 0; // set to millis() every time heatingMode value is changed. next update from domoticz/out will be rejected for dismissUpdateFromDomoticzTimeout in this case
- bool lastUpdateFromDomoticz_setTemp = false;
- bool lastUpdateFromDomoticz_heatingMode = false;
- int domoticzUpdateInterval = 30; // interval in min to force update of domoticz devices
- char cmdPayload[101]; // buffer for commands
- boolean cmdInQueue = false; // command is queued and will be processed next loop() run
- bool saveConfigToFlash = false; // conf is saved in next loop() run
- bool saveConfig2ToFlash = false; // conf2 is saved in next loop() run
- unsigned int saveValuesTimeout = 5000;
- unsigned long lastValueChange; // is set to millis() whenever setTemp value and/or heatingMode value is changed. used for autoSave function with hardcoded 5s timeout
- bool setTempAlreadySaved = true; // only save if not yet done
- bool heatingModeAlreadySaved = true; // only save if not yet done
- byte mqttMode = 0;
- unsigned long mqttLastReconnectAttempt = 0;
- int mqttReconnects = 0;
- DHT dht(PIN_DHTSENSOR, DHTTYPE);
- LiquidCrystal_I2C lcd(LCDADDR, LCDCOLS, LCDLINES); // set the LCD address to 0x27 for a 16 chars and 2 line display
- WiFiClient espClient;
- void mqttCallback(char* topic, byte* payload, unsigned int length);
- PubSubClient mqttclient(espClient);
- ESP8266WebServer httpServer(80);
- DNSServer dnsServer;
- PersWiFiManager persWM(httpServer, dnsServer);
- ESP8266HTTPUpdateServer httpUpdater;
- void setup() {
- Serial.begin(115200);
- delay(500);
- Serial.println();
- Serial.print(FIRMWARE_NAME);
- Serial.print(" v");
- Serial.print(VERSION);
- Serial.println(COPYRIGHT);
- Serial.println("starting...");
- pinMode(PIN_RELAIS, OUTPUT);
- digitalWrite(PIN_RELAIS, HIGH);
- pinMode(PIN_BUTTON_PLUS, INPUT_PULLUP);
- pinMode(PIN_BUTTON_MINUS, INPUT_PULLUP);
- pinMode(PIN_BUTTON_MODE, INPUT_PULLUP);
- strlcpy(deviceName, DEVICE_NAME, 31);
- strlcpy(mqtt_server, MQTT_SERVER, 41);
- strlcpy(mqtt_topic_in, MQTT_TOPIC_IN, 51);
- strlcpy(mqtt_topic_out, MQTT_TOPIC_OUT, 51);
- strlcpy(domoticz_out_topic, DOMOTICZ_OUT_TOPIC, 51); // changeable subscription topic, as domoticz supports different flat/hierarchical out-topics
- strlcpy(outTemp_topic_in, OUTTEMP_TOPIC_IN, 51);
- strlcpy(outHum_topic_in, OUTHUM_TOPIC_IN, 51);
- Serial.println("default config values loaded..");
- Serial.println("Mounting FS...");
- if (!SPIFFS.begin()) {
- Serial.println("Failed to mount file system");
- return;
- }
- //SPIFFS.format();
- //Serial.print("Format SPIFFS complete.");
- if (!SPIFFS.exists("/formatComplete.txt")) {
- Serial.println("Please wait 30 secs for SPIFFS to be formatted");
- SPIFFS.format();
- Serial.println("Spiffs formatted");
- File f = SPIFFS.open("/formatComplete.txt", "w");
- if (!f) {
- Serial.println("file open failed");
- } else {
- f.println("Format Complete");
- }
- f.close();
- } else {
- Serial.println("SPIFFS is formatted. Moving along...");
- }
- // // load config from SPIFFS if files exist
- if (!loadConfig()) {
- Serial.println("Failed to load conf.json");
- } else {
- Serial.println("conf.json loaded");
- }
- if (!loadConfig2()) {
- Serial.println("Failed to load conf2.json");
- } else {
- Serial.println("conf2.json loaded");
- }
- if (!loadSetTemp()) {
- Serial.println("Failed to load file 'setTemp'");
- } else {
- Serial.println("file 'setTemp' loaded");
- }
- if (!loadHeatingMode()) {
- Serial.println("Failed to load file 'heatingMode'");
- } else {
- Serial.println("file 'heatingMode' loaded");
- }
- setTempSaved = setTemp;
- heatingModeSaved = heatingMode;
- // initialize DHT11/22 temp/hum sensor
- dht.begin();
- checkUseDomoticz();
- delay(500);
- //optional code handlers to run everytime wifi is connected...
- persWM.onConnect([]() {
- Serial.println("wifi connected");
- Serial.println(WiFi.SSID());
- Serial.println(WiFi.localIP());
- });
- //...or AP mode is started
- persWM.onAp([]() {
- Serial.println("AP MODE");
- Serial.println(persWM.getApSsid());
- });
- //sets network name for AP mode
- persWM.setApCredentials(DEVICE_NAME);
- //persWM.setApCredentials(DEVICE_NAME, "password"); optional password
- //make connecting/disconnecting non-blocking
- persWM.setConnectNonBlock(true);
- //in non-blocking mode, program will continue past this point without waiting
- persWM.begin();
- delay(500);
- httpServerInit();
- mqttPrepareConnection();
- mqttClientInit();
- initDisplay();
- Serial.println("setup complete.");
- delay(1000);
- } //void setup
- void loop() {
- checkMillis();
- persWM.handleWiFi(); //in non-blocking mode, handleWiFi must be called in the main loop
- yield();
- dnsServer.processNextRequest();
- httpServer.handleClient();
- mqttHandleConnection();
- checkButtonStates();
- yield();
- evalCmd();
- if ( domoticzOutParseData ) {
- parseDomoticzOut();
- yield();
- }
- if (Serial.available()) {
- serialEvent();
- yield();
- }
-
- } //void loop
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