Homekit automation doesn't support negative temperatures

I'm trying to set up an automation that turns on a heater when outside temperature falls below freezing. I have a HomePod mini as a central controller and Eve Temperature sensor.

In the Home app, I find that I cannot select temperatures below zero (Celsius) for automation.

The problem is not with the Eve sensor or app - negative values are supported within the Eve ecosystem, but not handled by Apple.

Any suggestions?

HomePod mini, 18

Posted on Feb 23, 2025 3:39 PM

Reply
3 replies
Sort By: 

Feb 23, 2025 10:09 PM in response to chrisb_22

I have an Eve Weather outside to record our temperature. This is the Eve device made for placing outdoors. I don't recognise the name Eve Temperature.


As you can see from my screenshot I can use the Home app on my iPhone to create a negative temperature trigger to start another device.



I achieved this in the Home app by adding another automation, touching on the button for my Eve Weather (Patio Temperature as in the screen shot) and then follow the prompts to set a temperature to trigger the actions which follow.


However, would it not make more sense to have an automation to turn on a heater when that room falls below a set temperature? It is the comfort of the room you are regulating, not the outside temperature.


You can set the HomePod Mini to monitor the temperature (it has a thermometer and humidity sensor too), and it does not need to be in the room with the heater either. Of course, this would not work if you have the HomePod mini in a room which is already heated and not falling in temperature. Sounds like an opportunity to get some more smart devices?

Reply

Feb 24, 2025 6:10 AM in response to David McKinlay

Thank you for the reply David. Yes, I mean Eve Weather for the outdoor sensor. My application is to turn on a heater in the outdoor pond to keep the fish from freezing solid! (They don't need food, but do need some oxygen though a hole in the ice).

The screen shot you show is exactly what I want, but I don't get any negative temperatures on the scroll down list (see screen shot below). I am using Celsius temperature scale, HomePod Mini with tvOS 18.3, iPhone SE 2022 OS 18.3.1. Same problem with iPod mini 6th gen OS 18.3.1

So question is why do we have different capabilities with the Home app?

Chris

Reply

Homekit automation doesn't support negative temperatures

Welcome to Apple Support Community
A forum where Apple customers help each other with their products. Get started with your Apple Account.