Trouble with Shelly H&T USB power

I have trouble when running the Shelly H&T when using the USB power base.Under USB power the connection is intermittent at best:
On the left under USB power, after the second spike I gave up and reinstalled a battery again. Same location, so it is not closer to the hub. I set the Shelly to external power in the web interface and am also specifying ac_power in the Shelly discovery script.

Anyone have the same or different experience? Any idea what the issue could be?


Did you get anywhere with this?

I’m seeing my H&T’s die when the battery gets to ~68%, so was considering getting the USB power base… but for the money and (perhaps) less reliability, I’m not sure whether to keep with these or go a different route…

I haven’t tried the USB base since, but there have been numerous changes made in the Shelly discovery script I have been using that mention ac_power for the H&T. I’ll try again and will let you know.

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Nope, the problem is still there (the spikes are where I switched to the USB base at first, the second I unplugged and replugged the USB cable because I wasn’t getting any new data from the device, but then the temperature didn’t change enough for the Shelly to do that):

Screenshot at May 21 09-35-04

Other things I don’t like using the USB base:

  • It does generate some heat that raises the reported temperature by ~ 1 degree

  • Without the battery the Shelly is so light that it won’t stand straight on it’s base.

So I am going back to battery.

Hmm… interesting, thanks!

I have a support case open with Shelly at the moment… my batteries are dying “too soon” (in my vague opinion)

A recent battery died at 71% - that ran for ~2 weeks :rage:, so I am NOT impressed with that…

They are reporting that it is a firmware issue (I updated it ~1 or 2 weeks ago when I changed batteries), but that isn’t clear whether “70%” should actually be “0%”, (and a 2 week battery life is to be expected)
Whether the device is using too much power

This particular sensor is at the far end of the wifi signal, and in a room whether temp (& humidity) change fairly often, so I think this one is particular “busy”, but even so… 2 weeks! Other sensors are definitely lasting longer, but I really don’t like the idea of using 1/3rd of a battery’s capacity :face_with_raised_eyebrow:

Battery Levels

I’m even thinking of getting an external rechargeable AAA battery pack and wiring that in… looks terrible, but for the money I’ve spent on sensors, I’m not wanting to spend that much on batteries!

So… apologies, I’ve hijacked your original question and I don’t have an answer for you :slight_smile:

From the shop :

Shelly H&T has built-in modules for Humidity and Temperature and is the world’s first Wi-Fi Humidity & Temperature sensor working over 1 year on battery.

Big difference with 2 weeks.

That’s alright. I confirmed that the problem still exists, and that my decision to give up on the USB base is still the right one to make. I am not keeping track how often I change batteries, but it is definitely more then 6 months, so your 2 weeks are definitely not good™