eMotion Ultra Temperature and Humidity Sensor Cable Guide for Home Assistant

eMotion Ultra Temperature and Humidity Sensor Cable Guide for Home Assistant

eMotion Ultra combines 60GHz mmWave presence sensing with temperature and humidity data through its sensor cable. It also includes IR control, so one room device can provide occupancy context, climate readings, and commands for compatible appliances.

eMotion Ultra 60GHz mmWave presence sensor with temperature and humidity sensor cable setup for Home Assistant

The eMotion Ultra package includes the Temperature and Humidity Sensor Cable. eMotion Pro hardware also supports this cable, but the cable is not included with eMotion Pro and must be purchased separately. This guide explains the compatibility differences before setup.

What the Sensor Cable Adds to eMotion Ultra

Temperature context

Use the room reading as one condition for heating, cooling, notifications, or dashboard cards.

Humidity context

Track changing room conditions and combine them with ventilation or dehumidifier routines.

Presence context

Use 60GHz mmWave occupancy to avoid running a comfort scene for an empty room.

The cable does not replace the mmWave sensor. It adds climate data to a device that already provides presence information. Treat each reading as a separate entity when you review it in Home Assistant.

eMotion Ultra temperature and humidity sensor cable compatibility for Home Assistant

Temperature, Humidity and Bluetooth Sensor Compatibility

Device Temperature and Humidity Sensor Cable eTHS2 / Contact Sensor over Bluetooth Home Assistant automation
eMotion Ultra Supported and included in the eMotion Ultra package Supported Use cable, Bluetooth sensor, presence, and IR entities in supported workflows
eMotion Pro Hardware supported; cable is sold separately Not supported as a direct Bluetooth sensor connection Use its supported entities and automations in Home Assistant
eRemote Not supported Supported Use supported app or integration workflows
eRemote HA Not supported Not supported directly Can use separate Home Assistant climate or contact entities as automation conditions
eHome HA Not supported Not supported directly Can use separate Home Assistant climate or contact entities as automation conditions
Compatibility summary: The Temperature and Humidity Sensor Cable works only with eMotion Ultra and eMotion Pro. Direct Bluetooth access to eTHS2 and Contact Sensor is available only through eMotion Ultra and eRemote. eRemote HA and eHome HA do not directly support the cable or eTHS2. They can use those readings only when another compatible device exposes them as entities in Home Assistant.

Before You Connect the Cable

  • Keep eMotion Ultra powered off while you inspect and connect accessories.
  • Place the sensor where airflow, direct sunlight, and heat from electronics are less likely to distort the room reading.
  • Confirm the Home Assistant integration is healthy before changing the physical setup.
  • Record the current entity names so you can identify any new temperature or humidity entity.
  • Keep manual controls available for the connected air conditioner, fan, heater, or dehumidifier.
Equipment note: Home Assistant automations should not bypass appliance safety controls. Test IR commands and climate thresholds while someone is present.

Connect the Temperature and Humidity Sensor Cable

1. Power down and inspect

Disconnect power from eMotion Ultra. Check that the connector and cable are clean, dry, and undamaged.

2. Seat the connector carefully

Align the connector with the supported port and insert it without forcing or twisting. Stop if the connector does not align normally.

3. Position the sensing end

Keep it away from a window, direct AC discharge, heaters, and the warm exhaust of nearby electronics. The position should represent the occupied area rather than a local heat source.

4. Restore power

Allow the device and integration to reconnect. Do not change the automation until the device state is stable.

5. Identify the new readings

Open the device in Home Assistant and look for temperature and humidity entities. Entity labels can differ by integration or firmware, so verify units and current values.

Verify the Home Assistant Entities

Entity type What to check Normal setup evidence If unavailable
Presence Occupied and clear transitions State changes after controlled room entry and vacancy tests Review placement, zones, sensitivity, and integration status
Temperature Unit, plausible room value, update time Reading is close to another room reference after settling Check cable seating, power, entity registry, and firmware
Humidity Percentage, plausible value, update time Reading responds gradually to room conditions Check the same cable and integration path
IR action One command at a time Compatible appliance responds during a manual test Review profile, line of sight, range, and stored command

Compare the climate reading with a separate room reference after both have had time to settle. A small difference can come from placement, airflow, enclosure temperature, or sensor tolerance. Avoid adding a correction until you understand the direction and consistency of the difference.

Use Stable Thresholds Instead of Single Reading Changes

A climate automation should resist rapid on-and-off cycling. Use a threshold, a short duration, and a different stop point. This difference between start and stop thresholds is often called hysteresis.

Example logic: IF room is occupied AND temperature stays above the chosen start threshold THEN send the tested IR cooling command STOP only after temperature remains below a separate stop threshold OR when the room has been vacant for the selected delay

Choose values that fit the room and appliance. The example describes structure rather than prescribing a universal temperature.

eMotion Pro mmWave presence sensor with built-in IR control for Home Assistant climate automation

Combine Presence, Temperature, and Built-in IR Control

Presence prevents unnecessary comfort actions in an empty room. Temperature provides the climate condition, while built-in IR can operate a compatible appliance after the command is verified manually.

  1. Confirm the 60GHz presence state changes reliably in the target area.
  2. Confirm the temperature entity has a plausible value and recent update.
  3. Test the intended IR command from the device control interface.
  4. Create an automation with presence, threshold duration, and manual override conditions.
  5. Run a supervised test and review the entity history before enabling the schedule.

Humidity-Aware Room Automation

Humidity can support bathroom ventilation, basement alerts, laundry-room monitoring, or dehumidifier reminders. Use it as contextual data, not as a safety-certified measurement.

Scenario Trigger structure Action idea Guardrail
Bathroom ventilation Occupied and humidity rising for a selected duration Notify or operate a compatible local control Use a maximum run time and manual override
Basement monitoring Humidity stays above a chosen threshold Send a notification or run a tested dehumidifier scene Check condensate handling and appliance instructions
Bedroom comfort Occupied during sleep hours with climate conditions met Adjust a compatible AC or fan with IR Use conservative limits and retain the original remote

Troubleshoot Missing or Static Climate Readings

Entity does not appear

Check cable seating, restore device power, review the integration, and inspect disabled entities in Home Assistant. Avoid repeatedly deleting the integration before recording the current entity IDs.

Entity is unavailable

Confirm eMotion Ultra itself is online. If presence is available but climate entities are not, focus on the cable, entity registry, and firmware path.

Reading looks too high or too low

Move the sensing point away from direct sunlight, appliance airflow, warm electronics, or an exterior wall. Compare it with another reference in the same area after a settling period.

IR command works manually but not in the automation

Review the automation conditions, delays, selected device action, and execution trace. Test one command before restoring a multi-step scene.

Dashboard Cards to Add After Verification

  • Current presence state and last state change.
  • Temperature and humidity values with recent history.
  • Manual IR controls for the room appliance.
  • Automation enable switch and manual override.
  • Last triggered time for the comfort or ventilation scene.

Keep cards grouped by room so the operator can compare presence, climate, and appliance state without moving between dashboards.

Which LinknLink Products Fit This Workflow?

Climate and presence

  • eMotion Ultra includes the Temperature and Humidity Sensor Cable and supports direct Bluetooth access to eTHS2 and Contact Sensor.
  • eMotion Pro supports the Temperature and Humidity Sensor Cable at the hardware level, but the cable must be purchased separately.
  • Temperature and Humidity Sensor Cable is the separate cable option for a compatible eMotion Pro setup.

Bluetooth sensors and HA linkage

  • eRemote supports direct Bluetooth access to eTHS2 and Contact Sensor.
  • eTHS2 and Contact Sensor can connect through eMotion Ultra or eRemote.
  • eRemote HA and eHome HA do not directly support the cable or eTHS2; use separate Home Assistant entities to build the linkage.

Related Home Assistant Guides

Frequently Asked Questions

Is the Temperature and Humidity Sensor Cable included with eMotion Ultra?

Yes. The eMotion Ultra package includes the cable.

Can eMotion Pro use the Temperature and Humidity Sensor Cable?

Yes. eMotion Pro hardware supports it, but the cable is not included and must be purchased separately.

Which devices can connect to eTHS2 and Contact Sensor over Bluetooth?

Direct Bluetooth access is supported by eMotion Ultra and eRemote. It is not a direct feature of eMotion Pro, eRemote HA, or eHome HA.

Can eRemote HA or eHome HA use the sensor cable or eTHS2 directly?

No. They can use climate or contact readings only as separate Home Assistant entities supplied by another compatible device, then use those entities as automation conditions.

How do I prevent frequent switching?

Use a duration and separate start and stop thresholds, while keeping manual override and appliance safety controls active.

Build the Workflow in Stages

Begin with reliable presence and climate readings. Add one tested IR action next, then enable a schedule only after reviewing the Home Assistant history. This keeps the setup understandable and reversible.