What it exposes
| Feature | Property | Values | Control |
|---|---|---|---|
| Tds | tds | ppm | read only |
| Temperature | temperature | °C | read only |
| Battery | battery | % · 0…100 | read only |
| Ph | ph | pH | read only |
| Ec | ec | µS/cm | read only |
| Orp | orp | mV | read only |
| Free chlorine | free_chlorine | mg/L | read only |
| Ph max | ph_max | pH · 0…140 | settable |
| Ph min | ph_min | pH · 0…140 | settable |
| Ec max | ec_max | µS/cm · 0…20000 | settable |
| Ec min | ec_min | µS/cm · 0…20000 | settable |
| Orp max | orp_max | mV · 0…1200 | settable |
| Orp min | orp_min | mV · 0…1200 | settable |
| Free chlorine max | free_chlorine_max | mg/L · 0…40 | settable |
| Free chlorine min | free_chlorine_min | mg/L · 0…40 | settable |
| Salinity | salinity | ppm | read only |
| Backlightvalue | backlightvalue | gg · 0…1 | settable |
MQTT: state and commands
Zigbee2MQTT publishes the device state to zigbee2mqtt/my_device (my_device is the name you give the device). An example message:
{
"tds": 0,
"temperature": 21.6,
"battery": 87,
"ph": 0,
"ec": 0,
"orp": 0,
"free_chlorine": 0,
"ph_max": 70,
"ph_min": 70,
"ec_max": 10000,
"ec_min": 10000,
"orp_max": 600,
"orp_min": 600,
"free_chlorine_max": 20,
"linkquality": 120
}
The device only reports data and takes no commands.
Watch the topics live from the browser: MQTT client.
Home Assistant automation example
Zigbee2MQTT creates Home Assistant entities from the device name. If it is called my_device, an automation in automations.yaml can look like this:
- alias: "Room too warm"
mode: single
triggers:
- trigger: numeric_state
entity_id: sensor.my_device_temperature
above: 26
for: "00:10:00"
actions:
- action: notify.notify
data:
message: "Temperature above 26 °C"
Check the YAML: YAML checker.
How to pair it
- In Zigbee2MQTT click Permit join.
- Put the device in pairing mode: usually a long press of the reset button (5–10 s) until the LED blinks; bulbs: switch the power off and on 5–6 times.
- Keep the device close to the coordinator or a router while pairing.
- Give it a clear name: MQTT topics and Home Assistant entities are built from it.
Exact procedure and model notes: the device page in the Zigbee2MQTT docs. No coordinator yet: coordinator picker.