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#include <ESP8266WiFi.h>
#include <ArduinoJson.h>
#include <PubSubClient.h>
#include <HeatPump.h>
#include "mitsubishi_heatpump_mqtt_esp8266.h"
#ifdef OTA
#include <ESP8266mDNS.h>
#include <ArduinoOTA.h>
#endif
// wifi, mqtt and heatpump client instances
WiFiClient espClient;
PubSubClient mqtt_client(espClient);
HeatPump hp;
unsigned long lastTempSend;
// debug mode, when true, will send all packets received from the heatpump to topic heatpump_debug_topic
// this can also be set by sending "on" to heatpump_debug_set_topic
bool _debugMode = true;
void setup() {
pinMode(redLedPin, OUTPUT);
digitalWrite(redLedPin, HIGH);
pinMode(blueLedPin, OUTPUT);
digitalWrite(blueLedPin, HIGH);
WiFi.begin(ssid, password);
while (WiFi.status() != WL_CONNECTED) {
// wait 500ms, flashing the blue LED to indicate WiFi connecting...
digitalWrite(blueLedPin, LOW);
delay(250);
digitalWrite(blueLedPin, HIGH);
delay(250);
}
// startup mqtt connection
mqtt_client.setServer(mqtt_server, mqtt_port);
mqtt_client.setCallback(mqttCallback);
mqttConnect();
// connect to the heatpump. Callbacks first so that the hpPacketDebug callback is available for connect()
hp.setSettingsChangedCallback(hpSettingsChanged);
hp.setStatusChangedCallback(hpStatusChanged);
hp.setPacketCallback(hpPacketDebug);
#ifdef OTA
ArduinoOTA.begin();
#endif
while(!hp.connect(&Serial)) { }
lastTempSend = millis();
}
void hpSettingsChanged() {
const size_t bufferSize = JSON_OBJECT_SIZE(6);
DynamicJsonBuffer jsonBuffer(bufferSize);
JsonObject& root = jsonBuffer.createObject();
heatpumpSettings currentSettings = hp.getSettings();
root["power"] = currentSettings.power;
root["mode"] = currentSettings.mode;
root["temperature"] = currentSettings.temperature;
root["fan"] = currentSettings.fan;
root["vane"] = currentSettings.vane;
root["wideVane"] = currentSettings.wideVane;
char buffer[512];
root.printTo(buffer, sizeof(buffer));
bool retain = true;
if(!mqtt_client.publish(heatpump_topic, buffer, retain)) {
mqtt_client.publish(heatpump_debug_topic, "failed to publish to heatpump topic");
}
}
void hpStatusChanged(heatpumpStatus currentStatus) {
// send room temp and operating info
const size_t bufferSizeInfo = JSON_OBJECT_SIZE(2);
DynamicJsonBuffer jsonBufferInfo(bufferSizeInfo);
JsonObject& rootInfo = jsonBufferInfo.createObject();
rootInfo["roomTemperature"] = currentStatus.roomTemperature;
rootInfo["operating"] = currentStatus.operating;
char bufferInfo[512];
rootInfo.printTo(bufferInfo, sizeof(bufferInfo));
if(!mqtt_client.publish(heatpump_status_topic, bufferInfo, true)) {
mqtt_client.publish(heatpump_debug_topic, "failed to publish to room temp and operation status to heatpump/status topic");
}
// send the timer info
const size_t bufferSizeTimers = JSON_OBJECT_SIZE(5);
DynamicJsonBuffer jsonBufferTimers(bufferSizeTimers);
JsonObject& rootTimers = jsonBufferTimers.createObject();
rootTimers["mode"] = currentStatus.timers.mode;
rootTimers["onMins"] = currentStatus.timers.onMinutesSet;
rootTimers["onRemainMins"] = currentStatus.timers.onMinutesRemaining;
rootTimers["offMins"] = currentStatus.timers.offMinutesSet;
rootTimers["offRemainMins"] = currentStatus.timers.offMinutesRemaining;
char bufferTimers[512];
rootTimers.printTo(bufferTimers, sizeof(bufferTimers));
if(!mqtt_client.publish(heatpump_timers_topic, bufferTimers, true)) {
mqtt_client.publish(heatpump_debug_topic, "failed to publish timer info to heatpump/status topic");
}
}
void hpPacketDebug(byte* packet, unsigned int length, char* packetDirection) {
if (_debugMode) {
String message;
for (int idx = 0; idx < length; idx++) {
if (packet[idx] < 16) {
message += "0"; // pad single hex digits with a 0
}
message += String(packet[idx], HEX) + " ";
}
const size_t bufferSize = JSON_OBJECT_SIZE(1);
DynamicJsonBuffer jsonBuffer(bufferSize);
JsonObject& root = jsonBuffer.createObject();
root[packetDirection] = message;
char buffer[512];
root.printTo(buffer, sizeof(buffer));
if(!mqtt_client.publish(heatpump_debug_topic, buffer)) {
mqtt_client.publish(heatpump_debug_topic, "failed to publish to heatpump/debug topic");
}
}
}
void mqttCallback(char* topic, byte* payload, unsigned int length) {
// Copy payload into message buffer
char message[length + 1];
for (int i = 0; i < length; i++) {
message[i] = (char)payload[i];
}
message[length] = '\0';
if (strcmp(topic, heatpump_set_topic) == 0) { //if the incoming message is on the heatpump_set_topic topic...
// Parse message into JSON
const size_t bufferSize = JSON_OBJECT_SIZE(6);
DynamicJsonBuffer jsonBuffer(bufferSize);
JsonObject& root = jsonBuffer.parseObject(message);
if (!root.success()) {
mqtt_client.publish(heatpump_debug_topic, "!root.success(): invalid JSON on heatpump_set_topic...");
return;
}
// Step 3: Retrieve the values
if (root.containsKey("power")) {
String power = root["power"];
hp.setPowerSetting(power);
}
if (root.containsKey("mode")) {
String mode = root["mode"];
hp.setModeSetting(mode);
}
if (root.containsKey("temperature")) {
int temperature = root["temperature"];
hp.setTemperature(temperature);
}
if (root.containsKey("fan")) {
String fan = root["fan"];
hp.setFanSpeed(fan);
}
if (root.containsKey("vane")) {
String vane = root["vane"];
hp.setVaneSetting(vane);
}
if (root.containsKey("wideVane")) {
String wideVane = root["wideVane"];
hp.setWideVaneSetting(wideVane);
}
if (root.containsKey("custom")) {
String custom = root["custom"];
// copy custom packet to char array
char buffer[(custom.length() + 1)]; // +1 for the NULL at the end
custom.toCharArray(buffer, (custom.length() + 1));
byte bytes[20]; // max custom packet bytes is 20
int byteCount = 0;
char *nextByte;
// loop over the byte string, breaking it up by spaces (or at the end of the line - \n)
nextByte = strtok(buffer, " ");
while (nextByte != NULL && byteCount < 20) {
bytes[byteCount] = strtol(nextByte, NULL, 16); // convert from hex string
nextByte = strtok(NULL, " ");
byteCount++;
}
// dump the packet so we can see what it is. handy because you can run the code without connecting the ESP to the heatpump, and test sending custom packets
hpPacketDebug(bytes, byteCount, "customPacket");
hp.sendCustomPacket(bytes, byteCount);
}
else {
bool result = hp.update();
if (!result) {
mqtt_client.publish(heatpump_debug_topic, "heatpump: update() failed");
}
}
} else if (strcmp(topic, heatpump_debug_set_topic) == 0) { //if the incoming message is on the heatpump_debug_set_topic topic...
if (strcmp(message, "on") == 0) {
_debugMode = true;
mqtt_client.publish(heatpump_debug_topic, "debug mode enabled");
} else if (strcmp(message, "off") == 0) {
_debugMode = false;
mqtt_client.publish(heatpump_debug_topic, "debug mode disabled");
}
} else {
mqtt_client.publish(heatpump_debug_topic, strcat("heatpump: wrong mqtt topic: ", topic));
}
}
void mqttConnect() {
// Loop until we're reconnected
while (!mqtt_client.connected()) {
// Attempt to connect
if (mqtt_client.connect(client_id, mqtt_username, mqtt_password)) {
mqtt_client.subscribe(heatpump_set_topic);
mqtt_client.subscribe(heatpump_debug_set_topic);
} else {
// Wait 5 seconds before retrying
delay(5000);
}
}
}
void loop() {
if (!mqtt_client.connected()) {
mqttConnect();
}
hp.sync();
if (millis() > (lastTempSend + SEND_ROOM_TEMP_INTERVAL_MS)) { // only send the temperature every 60s
hpStatusChanged(hp.getStatus());
lastTempSend = millis();
}
mqtt_client.loop();
#ifdef OTA
ArduinoOTA.handle();
#endif
}