Domoticz

Integration with Domoticz

Pre-requisite

• The CVE/non-CVE unit must be in "standard" or "medium" mode before your Domoticz server can control the add-on
• An MQTT broker (e.g. Mosquitto) the running and available for the add-on to connect to
• Domoticz connected to the MQTT broker
• Domoticz MQTT must be enabled in the add-on web interface under "MQTT".

Domoticz and MQTT

If Domoticz MQTT support is on, the state topic is domoticz/in and the command topic is domoticz/out. No other topics are available. If Domoticz MQTT support is on the command topic is domoticz/out; in this case commands that originate from other than configured IDX, need to contain the key/value pair "dtype":"ithofan" in order to get processed.

Integration steps

• Add a virtual (MQTT) sensor via the hardware setup in Domoticz you need to note the IDX for both

• fan speed --> switch --> dimmer (in mqtt: itho/state)
• temperature / humidity (in MQTT: itho/sensor) only applicable if the sensor is enabled

• Go to the add-on webpage
• Select on the left menu "mqtt"
• Enable Domoticz option
• Fill in the idx

Using Node-Red

---

FYI You can use Node-red to transform data from the Itho-add on to Domoticz Listen to "itho/sensor" (MQTT in) outputs

{"temp":24.9,"hum":43.0}

Then transform to

{"idx":<idx-number>,"svalue":"24,9"}

What you can send to MQTT (MQTT out) node what connects to Domoticz in

output = '{"idx":79,"svalue":"'+ msg.payload.temp +'"}'
msg.payload = output
return msg;

Automation

Example to change speed when there is an increase in humidity, triggered by showering in the bathroom

---

dzvents code

return
{
    on =
    {
        timer = {'every 1 minutes'}
    },
    data =
    {
        previousHumidity = { initial = 100 },
        douchen = { initial = false },
        oldLevel = { initial = 30 },
        target_hum = { initial = 50 }
    },
    execute = function(domoticz)
        local sensor = domoticz.devices(XX)
        local setting = domoticz.devices(YY) 
        if ((sensor.humidity - domoticz.data.previousHumidity) >= 2) or (sensor.humidity >= 75) then
            if not domoticz.data.douchen then
                -- there was a significant rise
                domoticz.data.douchen = true
                domoticz.data.target_hum = domoticz.data.previousHumidity + 1
                domoticz.data.oldLevel = setting.level
                setting.dimTo(100)
                domoticz.log("Douche mode detected, target_hum=" .. domoticz.data.target_hum .. "%, old level: " .. domoticz.data.oldLevel .. "%", domoticz.LOG_INFO);
            end
        elseif domoticz.data.douchen and sensor.humidity <= domoticz.data.target_hum then
            domoticz.log("Douche mode ended, current level " .. setting.level .. " restoring to " .. domoticz.data.oldLevel .. " if less than current", domoticz.LOG_INFO);
            if ( setting.level > domoticz.data.oldLevel ) then
                setting.dimTo(domoticz.data.oldLevel)
            end
            domoticz.data.douchen = false
        end
        -- store current value for next cycle
        domoticz.data.previousHumidity = sensor.humidity
    end
}