Gen 1 shelly devices including but not limited to HT sensor not displaying Fahrenheit only Celsius

[sungla55guy]

The problem

Since upgrading to 2024.1.0 all my shelly HT sensors only display Celsius and won't update when I change the change the unit of measurement. All of my shelly devices have the latest firmware installed

What version of Home Assistant Core has the issue?

2024.1.0

What was the last working version of Home Assistant Core?

2023.12.4

What type of installation are you running?

Home Assistant Supervised

Integration causing the issue

shelly

Link to integration documentation on our website

https://www.home-assistant.io/integrations/shelly/

Diagnostics information

No response

Example YAML snippet

No response

Anything in the logs that might be useful for us?

No response

Additional information

No response

[home-assistant]

Hey there @balloob, @bieniu, @thecode, @chemelli74, @bdraco, mind taking a look at this issue as it has been labeled with an integration (shelly) you are listed as a code owner for? Thanks!

Code owner commands

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[glyndon]

Same problem here (using core), and I found a temporary workaround: While attempting to change the scale from C to F, also change the display precision - to anything other than its current state. Then press 'Update' and the scale will be at F.
Until the next restart of HA, at which point one must repeat this action.

[smatthew]

Problem still exists in 2024.1.2, and it's pretending ALL readings were always Celsius, completely ruining historical data.

[thecode]

Please download the diagnostics from the device card in Home Assistant and attach it in a comment.

[glyndon]

I have 3 Shelly HT sensors. All do the same thing at every HA restart.
Here is the diag from one of them:

config_entry-shelly-3ed0f9c561fa10dd754b73fc771038ca.json.txt

[thecode]

According to the diagnostics everything is correct in your setup, lets wait for someone to try to investigate or information from other affected devices so maybe we can figure out the problem.

[glyndon]

Note that one can work around it in the UI by changing more than just 'range', then the setting sticks until restart.
It's ignored otherwise - click 'Update' and nothing is changed. This is new behavior since 2024.1.0, and a new incorrect UI behavior (to immediately ignore a setting change unless another setting is also changed).

I'm mentioning this in hope that it provides a hint pointing to the locus of the bug.

[exactmike]

same issue here with multiple HTs

[JasonJanelle]

I'm also having the issue with all 6 of my HTs.

[toolman196]

I also have this same problem I think I notice it when 2023.12 release to 2024.1 beta release like to one has said that we can manual change from C to F and will be fine until restart of HA. I have also removed all Shelly H&T re-added them back in everything is fine until I restart HA. It is larger than just Shelly's H&T just noticed that one of the flood sensor from Shelly is also reporting temp in C and not F in HA. All Shelly are configured to report in F and not C. I am not really monitoring that temp sensor have not noticed it.

[doabbs]

Seeing this with all Shelly H&T as well as H&T Plus. 2024.1.2

[glyndon]

FWIW, I just tested with just-released aioshelly==7.1.0 (and confirmed that it stayed at that version, having edited .../shelly/manifest.json to accept it).

No change WRT this problem.

[bieniu]

I spent some time on this problem yesterday and I can actually reproduce it, but so far I haven't found the cause. There were no changes related to unit conversion in the Shelly integration and the problem only applies to sleeping devices, so I suspect that the issue occurs when restoring the state from registry when starting Home Assistant.

Please do not comment "same issue here", 👍 in the open post is enough.

[bdraco]

I ordered one of these devices to try to find the root cause, should be here next week

[tomeralgai]

Came here to say that this same thing is happening with shelly flood as well.

One way around is to change the temp to kelvin and then back to fahrenheit. But this is annoying and needs to be done after every update.

[bdraco]

We found the root cause of this issue. A short term fix is forthcoming until a longer term redesign to solve some underlying issues can be made.