Wifi Signal strength decreases liniair with current temperature

1

So this was weird today.
Its for the first time in my home assistant adventure that the temperature has a average of 38°C.

I updated the core and esp home to the newest version but some devices are not pingable anymore.
I tought initially because of the update so i went for a search and ran some tests.
Narrowed the problem down to: The Wifi on devices further away is not stable anymore.

I found this article, that was totaly new to me:

Long story short. If its hot! the RSSI level decreases linearly.
I hope this post will prevent someone going in to panic mode.

Have a nice day!

//edit: found better article

2 Likes
2

What makes you think that experiments done with Panstamp 2.0 NRG wireless modules with built-in 868 MHz CC1101 radio are applicable to ESP 2.4 GHz modules?

3

This was about the ESP32 in my garden shed and after some testing and reading some articles that was my conclusion. I was happy, solved it so i tought share it.
So i understand i missunderstood?

It worked in 15-30 deg c for more than a month without any interuption.
Problem was solved after connecting to a AP nearby.

Thanks for your information :slight_smile:
I was really convinced that this was a possible explanation.

Glass sphere question.
What do you think this can be?

4

I have a couple of ESP modules in my roof space where the temperature can vary from 0 to 40 C.

Signal strengths are pretty constant.

Next time you lose contact with an ESPHome device after updating, try reloading the device integration on the Devices & Services → Integrations page.