Zigbee 2 gang dimer not reliable when sending commands to both gangs in short succession - Tuya/Moes Star Ring

[gorstj (John)]

Looking for some pointers on how to interpret the log and resolve this issue.

I have a Moes (Tuya?) Star Ring 2 gang dimmer
Controlling each of the gangs individually works fine.

However, if I create a ‘Group’ helper within HA (n.b. not a Zigbee Group) then often only a single gang of the dimmer will respond (about 10% of the time both will correctly respond to the commands)

The same happens if I do an automation to switch both gangs on individually…however, if I insert a 30ms delay in-between the two commands it works with 100% reliability (any less than 30ms doesn’t work)

Is this normal for a device to not respond when multiple commands sent in quick succession? Is there a way to configure ZHA to perhaps have a small delay between firing comamnds? (to a single device or all devices)

The status of the 2 gangs in the HA UI shows what the status of the 2 gangs should be (i.e. one of the lights on/off status is incorrect)

I have taken a debug (link below) of turning both gangs on using a HA group (only the 2nd gang actually switched on in this example - Endpoint2. Endpoint1 stayed off although the UI said it was on)

Core 2023.11.3 (running HAOS as a VM in Proxmox)
ZHA
Sonoff Zigbee 3.0 USB Plus passed directly through to HAOS
~5m lineof site between my co-ordinator and the dimmer
67 devices (~50% are routers)

Debug Log link https://pastebin.com/d3XfurU4

Thanks for any pointers

[jerrm]

I’ve seen similar behavior with other Tuya zigbee products. For the device I had, I scripted a delay between commands.

First thing I would try is the zigbee group.

[gorstj (John)]

I would put them in a Zigbee Group but I also need to control them independently

[jerrm]

Single device control should still work.

I don’t know if a zigbee group will fix it, but it’s an easy thing to test.