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Added support for controlling a second relay for cooling. #441

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Added support for controlling a second relay for cooling. #441

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83 changes: 67 additions & 16 deletions include/mqtt.h
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Original file line number Diff line number Diff line change
Expand Up @@ -6,11 +6,17 @@
#define MQTT_lwt "espaltherma/LWT"

#define EEPROM_CHK 1
#define EEPROM_STATE 0
#define EEPROM_HEAT_STATE 0

#ifdef PIN_COOL
#define EEPROM_COOL_STATE 2
#endif

#define MQTT_attr "espaltherma/ATTR"
#define MQTT_lwt "espaltherma/LWT"

enum Mode { heating, cooling };

#ifdef JSONTABLE
char jsonbuff[MAX_MSG_SIZE] = "[{\0";
#else
Expand Down Expand Up @@ -53,22 +59,32 @@ void sendValues()
#endif
}

void saveEEPROM(uint8_t state){
EEPROM.write(EEPROM_STATE,state);
void saveEEPROM(uint8_t address, uint8_t state){
EEPROM.write(address,state);
EEPROM.commit();
}

void readEEPROM(){
if ('R' == EEPROM.read(EEPROM_CHK)){
digitalWrite(PIN_THERM,EEPROM.read(EEPROM_STATE));
mqttSerial.printf("Restoring previous state: %s",(EEPROM.read(EEPROM_STATE) == PIN_THERM_ACTIVE_STATE)? "On":"Off" );
digitalWrite(PIN_THERM,EEPROM.read(EEPROM_HEAT_STATE));
mqttSerial.printf("Restoring previous heating state: %s",(EEPROM.read(EEPROM_HEAT_STATE) == PIN_THERM_ACTIVE_STATE)? "On":"Off" );
#ifdef PIN_COOL
digitalWrite(PIN_COOL,EEPROM.read(EEPROM_COOL_STATE));
mqttSerial.printf("Restoring previous cooling state: %s",(EEPROM.read(EEPROM_COOL_STATE) == PIN_THERM_ACTIVE_STATE)? "On":"Off" );
#endif
}
else{
mqttSerial.printf("EEPROM not initialized (%d). Initializing...",EEPROM.read(EEPROM_CHK));
EEPROM.write(EEPROM_CHK,'R');
EEPROM.write(EEPROM_STATE,!PIN_THERM_ACTIVE_STATE);
EEPROM.write(EEPROM_HEAT_STATE,!PIN_THERM_ACTIVE_STATE);
#ifdef PIN_COOL
EEPROM.write(EEPROM_COOL_STATE,!PIN_THERM_ACTIVE_STATE);
#endif
EEPROM.commit();
digitalWrite(PIN_THERM,!PIN_THERM_ACTIVE_STATE);
#ifdef PIN_COOL
digitalWrite(PIN_COOL,!PIN_THERM_ACTIVE_STATE);
#endif
}
}

Expand All @@ -89,6 +105,12 @@ void reconnectMqtt()

// Subscribe
client.subscribe("espaltherma/POWER");

#ifdef PIN_COOL
client.publish("homeassistant/switch/espAltherma_cool/config", "{\"name\":\"Altherma_cooling\",\"cmd_t\":\"~/COOLING\",\"stat_t\":\"~/COOL_STATE\",\"pl_off\":\"OFF\",\"pl_on\":\"ON\",\"~\":\"espaltherma\"}", true);
client.subscribe("espaltherma/COOLING");
#endif

#ifdef PIN_SG1
// Smart Grid
client.publish("homeassistant/select/espAltherma/sg/config", "{\"availability\":[{\"topic\":\"espaltherma/LWT\",\"payload_available\":\"Online\",\"payload_not_available\":\"Offline\"}],\"availability_mode\":\"all\",\"unique_id\":\"espaltherma_sg\",\"device\":{\"identifiers\":[\"ESPAltherma\"],\"manufacturer\":\"ESPAltherma\",\"model\":\"M5StickC PLUS ESP32-PICO\",\"name\":\"ESPAltherma\"},\"icon\":\"mdi:solar-power\",\"name\":\"EspAltherma Smart Grid\",\"command_topic\":\"espaltherma/sg/set\",\"command_template\":\"{% if value == 'Free Running' %} 0 {% elif value == 'Forced Off' %} 1 {% elif value == 'Recommended On' %} 2 {% elif value == 'Forced On' %} 3 {% else %} 0 {% endif %}\",\"options\":[\"Free Running\",\"Forced Off\",\"Recommended On\",\"Forced On\"],\"state_topic\":\"espaltherma/sg/state\",\"value_template\":\"{% set mapper = { '0':'Free Running', '1':'Forced Off', '2':'Recommended On', '3':'Forced On' } %} {% set word = mapper[value] %} {{ word }}\"}", true);
Expand Down Expand Up @@ -124,25 +146,48 @@ void reconnectMqtt()
}
}

void callbackTherm(byte *payload, unsigned int length)
void setHeatPumpState(Mode mode, bool turn_on) {
// It is possible that the state is inversed in comparison to the original code for heating only, not sure why
uint8_t state = (turn_on) ? PIN_THERM_ACTIVE_STATE : !PIN_THERM_ACTIVE_STATE;
std::string value = (turn_on) ? "ON" : "OFF";

std::string topic = (mode == heating) ? "STATE" : "COOL_STATE";
unsigned int pin = (mode == heating) ? PIN_THERM : PIN_COOL;
uint8_t eeprom_address = (mode == heating) ? EEPROM_HEAT_STATE : EEPROM_COOL_STATE;

digitalWrite(pin, state);
saveEEPROM(eeprom_address, state);

client.publish(("espaltherma/" + topic).c_str(), value.c_str(), true);

std::string logmessage = "Turned " + topic + " " + value;
mqttSerial.println(logmessage.c_str());
}

void callbackHeatPumpState(byte *payload, unsigned int length, Mode mode)
{
payload[length] = '\0';

// Is it ON or OFF?
// Ok I'm not super proud of this, but it works :p
if (payload[1] == 'F')
{ //turn off
digitalWrite(PIN_THERM, !PIN_THERM_ACTIVE_STATE);
saveEEPROM(!PIN_THERM_ACTIVE_STATE);
client.publish("espaltherma/STATE", "OFF", true);
mqttSerial.println("Turned OFF");
setHeatPumpState(mode, false);
}
else if (payload[1] == 'N')
{ //turn on
digitalWrite(PIN_THERM, PIN_THERM_ACTIVE_STATE);
saveEEPROM(PIN_THERM_ACTIVE_STATE);
client.publish("espaltherma/STATE", "ON", true);
mqttSerial.println("Turned ON");
if (mode == heating) {
#ifdef PIN_COOL
setHeatPumpState(cooling, false);
#endif
setHeatPumpState(heating, true);
}
#ifdef PIN_COOL
else {
setHeatPumpState(heating, false);
setHeatPumpState(cooling, true);
}
#endif
}
else if (payload[0] == 'R')//R(eset/eboot)
{
Expand Down Expand Up @@ -232,8 +277,14 @@ void callback(char *topic, byte *payload, unsigned int length)

if (strcmp(topic, "espaltherma/POWER") == 0)
{
callbackTherm(payload, length);
callbackHeatPumpState(payload, length, heating);
}
#ifdef PIN_COOL
else if (strcmp(topic, "espaltherma/COOLING") == 0)
{
callbackHeatPumpState(payload, length, cooling);
}
#endif
#ifdef PIN_SG1
else if (strcmp(topic, "espaltherma/sg/set") == 0)
{
Expand Down
5 changes: 5 additions & 0 deletions src/main.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -309,6 +309,11 @@ void setup()
pinMode(PIN_THERM, OUTPUT);
// digitalWrite(PIN_THERM, PIN_THERM_ACTIVE_STATE);

#ifdef PIN_COOL
pinMode(PIN_COOL, OUTPUT);
// digitalWrite(PIN_COOL, PIN_THERM_ACTIVE_STATE);
#endif

#ifdef SAFETY_RELAY_PIN
pinMode(SAFETY_RELAY_PIN, OUTPUT);
digitalWrite(SAFETY_RELAY_PIN, !SAFETY_RELAY_ACTIVE_STATE);
Expand Down
3 changes: 2 additions & 1 deletion src/setup.h
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Original file line number Diff line number Diff line change
Expand Up @@ -29,7 +29,8 @@
#endif

#define PIN_THERM 0// Pin connected to the thermostat relay (normally open)
#define PIN_THERM_ACTIVE_STATE HIGH// State to trigger the thermostat relay
#define PIN_THERM_ACTIVE_STATE HIGH// State to trigger the thermostat/ cooling relay
#define PIN_COOL 4// Pin connected to the cooling relay (normally open)

//Smart grid control - Optional:
//Uncomment and set to enable SG mqtt functions
Expand Down