How to Set Persistent "on_time" for Sonoff ZBMini Using Zigbee2Mqtt

Configuration Zigbee
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1

Hi everyone,
I’ve recently set up the Sonoff ZBMini switch using Zigbee2Mqtt, and everything is working as expected.
According to the device’s specifications (SONOFF ZBMINI control via MQTT | Zigbee2MQTT), it’s possible to send the ON command with additional parameters, specifically “on_time” and “off_wait_time.” These parameters control how long the switch stays ON and the cooldown time before it responds to new timed ON commands.

I can successfully send an MQTT message, and the light turns off automatically after 3 seconds:

action: mqtt.publish  
data:  
  qos: "0"  
  topic: zigbee2mqtt/Luce Sala 1/set  
  payload: "{\"state\" : \"ON\", \"on_time\" : 3}"

What I’d like to know is whether it’s possible to store the “on_time” value directly on the ZBMini so that the same behavior applies when the physical button is used to turn on the switch. Is there a way to make this setting persistent on the device?

I understand this could be easily achieved through a Home Assistant automation, but I’m looking for a solution that works independently of whether HA is running or not.

Thanks in advance for any tips or suggestions!

2

I don’t see a way to set this persistently on the device at all, but if your valve works at all with on_time then I guess you’re lucky, I can seem to get mine working at all. It just stays on.

3

oh… nevermind, I got it to work, seems the firmware is buggy and multiplies the number of seconds by ~10