Local App/ Classic monitor temperature

[Corndog]

I noticed in one of Ryan's tutorial videos his AUX on the local app was reading the temperature of his freezer, I believe thats what he said. If this is what I thought I witnessed how is this done. I really need to monitor the power house temperature to make certain the furnace is keeping up, -30C lately and reversely the summer temp as well.
Thank you

[ClassicCrazy]

I have internet to my unattached non heated power room. I have built an insulated box around my batteries and have a small space heater in it . It is controlled by an Inkbird temperature sensor that is the wifi model. I can see the temps and also change the setpoints remotely either using their app , or there are ways to do it without using their app . I also use esp32 flashed with Tasmota firmware and one wire sensors on them to see temps in various places. The esp32 have built in webpage and they can be accessed from your home network via wifi.
I also have mini split in the power room I can remotely control. In fact the sun is out and batteries full so I am going to turn it on . I use Home Assistant to monitor and control everything around here - batteries, inverters, controllers, switches on stuff, etc. There is a bit of a learning curve with Home Assistant but it is a powerful open source software tool for control and monitoring worth the time investment in geek work involved to figure it out.
Larry

[laszlo]

Clever. Larry - which one-wire temp sensor you are using  with the esp32? Or maybe diy?

[ClassicCrazy]

I use ones like these that I got in pack of ten on aliexpress or ebay.
https://www.adafruit.com/product/381
Basically they are the DS18B20 in a metal end, and they each have their own address so you can put them in a string and know which ones are which.
The Tasmota firmware makes it super easy to do this on one pin if you want.
I think you can do the same with ESP Home but havent tried that yet.
If you flash the Tasmota to an Esp32 ( or esp8266 ) you will see on the pins configuration drop down list option for these one wire sensors.
https://tasmota.github.io/docs/DS18x20/#multiple-sensors
You can also use them with arduino too.
Larry