one of my plugs get turned off somehow.
I see this line in the event log:
switch off Car Charger was turned off [physical]
what does "physical" mean ?
Nobody can reach this plug, it is in a locked box.
So how does it get turned off physically ?
Does this happen when power coming to the plug is down ?
‘physical’ means that the plug was turned on or off without sending a command from the HE hub before.
Usually this means the pug was operated from the device local on/off physical switch.
However, there are many reports that some of the Tuya-based plugs will automatically switch off on short over-voltage peaks. Some manufacturers published a patch for OTA update (via Tuya GW), but most of the unknown OEMs did not.
Did you have Voltage readings enabled? Any peaks around 250V or higher?
I've just checked. There is no voltage peak but I see voltage drop on my Grafana graph. But this might be due to power down ?
I haven't noticed so far Tuya plugs to send a 'last breath' type of message when powered down.
could it be that when power down and up it does not switch on and stays off ?
Yes, could be.
If it was a momentary voltage drop, the plug should turn back on automatically.
If it was overvoltage automatic shut off, you will need to turn it back on manually (either via command or locally).
there is a "set power on state" setting on your device handler.
I am not sure what it was before (doesn't show), but now I set it to "last state"
maybe that could save me ?
Only if it was a power supply drop.
Overvoltage emergency shut off is not received automatically.
tuned off again.
I'm going crazy.
I didn't have this issue, until I added the device to Maker API.
But since you say "physical" is really not related to Hub, then it is not Maker API triggered.
See the ‘Events’ page (from the button on the top of the device page) - there is a column showing which app called the on/off command.
There is only "triggered apps" column and AFAIK it shows which apps were triggered by this event, not the triggering app.
@kkossev
Normally I use a 20A plug and normally my usage was not exceeding 17A
Today I saw it goes up to 19.5A
would this be causing the issue ?
Does the plug stop when it goes over 20A ?
That's a very likely reason!
I wouldn't trust this plug handling safely 20A... Have you looked at the DIN rail circuit breakers available on AliExpress? Search AE for 'Tuya Zigbee DIN' ...
There are models rated 50A++ , they have configurable under/over voltage and current protection configuration.
Yes! I think that all metering plugs have overcurrent protection (hardcoded in their firmware).
does your driver support these ? or any other Hubitat driver ?
I use a 40A version of this for my EV charger, it works great.
There are DIN rail high-power switches listed on the first post in this thread .
so the suggestion is I remove the zigbee plug and instead of it I use a zigbee DIN which would support up to 40 or 50A
I will be able to turn on/off using the same driver ?
trying to see if I get it correct.
Yes that is correct. I had an unused second phase (under floor heating never used), the 40A breaker was installed on this second phase with a dedicated 32A feed to my EV charger. The inbuilt timer on the charger (and car) left a lot to be desired so using this driver I can control the charging of the car to sunny days (solar) and between 12am-6am on the EV tariff. Lots of data to measure and graph.
Obviously, you need a dedicated electrical circuit from your switchboard to your appliance, if not you will be turning everything else on and off on the circuit. And installing the circuit breaker is a job for a certified electrician.
You need to understand the maximum amp draw of your EVs battery and build a dedicated circuit from the switchboard to the EV charger. This may mean upgrading the circuit breaker, cabling and switch outlet. I built the electrical circuit to 32A to fast charge the battery, although the EV battery is restricted to draw a maximum of around 16A 
.
thank you. I already have a dedicated circuit from my switchboard. It supports up to 50A
I had installed a 20A plug (discussed in this thread) because my charger is 16A and I never thought I would hit the 20A limit of the plug with a 16A charger. I'm still surprised to see that it can draw 20A
So now I will just change the plug with this suggested DIN circuit braker.I guess no need for an electrician. (I know how to insert a breaker to a circuit.)
I received and installed my new circuit breaker today. The driver works fine.
But it is a 63A adjustable device. How can I adjust it to 32A max ?
Download the Hubitat app
