[Bug]: Sonoff MINI-ZBRBS fails to move shutter after firmware update to v1.1.0 (v1.0.5 works)

[nicodoerr]

After updating the firmware of my Sonoff MINI-ZBRBS (Roller Shutter Module) to 1.1.0 (#989), the device no longer responds correctly to "Open/Close" commands or physical switch inputs.

When triggered, the internal relay clicks twice, but the motor does not move. In Zigbee2MQTT, the state immediately jumps from 0% to 100% (or vice versa). Interestingly, controlling the device via the percentage/position slider still works.

Actual Behavior

• Physical Switch: Relay clicks twice, no movement.
• Z2M Open/Close Buttons: Relay clicks twice, state jumps instantly to 0/100%, no movement.
• Position Slider: Works as expected.

Expected Behavior
The motor should move to the fully open or closed position when the command is sent, and the relay should stay engaged until the end position is reached.

Environment

• Device: Sonoff MINI-ZBRBS (Roller Shutter Module)
• Zigbee2MQTT version: 2.7.2
• Firmware version (Broken): 1.1.0
• Firmware version (Working): 1.0.5 (I have other units on this version that work perfectly)

Additional Context
It seems like the update corrupted the calibration or end-stop detection. Since my other devices on version 1.0.5 do not show this behavior, I am looking for a way to downgrade or a fix for the current firmware. Does anyone have the OTA/Firmware file for v1.0.5?

[klsx0]

Hello,
I have exactly the same issue after updating to firmware 1.1.0 (relay clicks twice, open/close doesn’t work, only the position slider works).
I saw that this issue is marked as completed, could you please explain how you fixed it?

Did you downgrade the firmware, redo the calibration, or apply another workaround?
Thanks a lot!

[nicodoerr]

I initially closed this to test if a restart or manual recalibration would resolve the problem. Unfortunately, after thorough testing, neither fixed the issue.
Since this appears to be a consistent bug in the new firmware version and not a local configuration error, I’m reopening this.

[clmnsr]

I have the same problem. I did the update the day before yesterday and noticed yesterday that the roller shutters only twitch briefly when opening and closing.

[andrei-lazarov]

cc: @lcheng33775823

[Th-Ar]

Samething here

[PacoSchumi]

Similar here.

I updated 7 relays and most of them didn't behave well. I have phisical switch in edge mode and down switch seems to work well but the up switch works when the current is cut.
Also HA automations don't work well, despite the relay is "online" (some covers won't go dows or up).

The three relays I didn't update works seamlessly.

Is there a way to downgrade? I don't find the old firmware.

[Suschibomber]

Same with the newest firmware 1.1.0 :(

[Suschibomber]

Additional Context It seems like the update corrupted the calibration or end-stop detection. Since my other devices on version 1.0.5 do not show this behavior, I am looking for a way to downgrade or a fix for the current firmware. Does anyone have the OTA/Firmware file for v1.0.5?

I'll be getting 8 more delivered tomorrow that I need to install. If you tell me how to extract the firmware from them, I can make it available to everyone.

[clmnsr]

Additional Context It seems like the update corrupted the calibration or end-stop detection. Since my other devices on version 1.0.5 do not show this behavior, I am looking for a way to downgrade or a fix for the current firmware. Does anyone have the OTA/Firmware file for v1.0.5?

I'll be getting 8 more delivered tomorrow that I need to install. If you tell me how to extract the firmware from them, I can make it available to everyone.

Thank you!

As far as I know, it is not possible to extract the firmware wirelessly via OTA or Zigbee2MQTT. I believe that dumping the firmware requires physical access to the device's chip using a hardware programmer (like a CC-Debugger or J-Link) and a wired connection to the debug pins. However, I’m not 100% sure if there's any other way.

[andrei-lazarov]

I don't think it's possible, even with a hardware programmer.

Romasku tested ZBMINIL2:

Device uses cryptographic protection and so stock firmware cannot be dumped and restored.

Other brands are possible. We have dumps from Tuya and IKEA.

[Suschibomber]

As far as I know, it is not possible to extract the firmware wirelessly via OTA or Zigbee2MQTT. I believe that dumping the firmware requires physical access to the device's chip using a hardware programmer (like a CC-Debugger or J-Link) and a wired connection to the debug pins. However, I’m not 100% sure if there's any other way.

Oh crap. What can we do now? Is this a programming issue on the part of Zigbee2MQTT, or can only Sonoff itself change something to make them work again?

[andrei-lazarov]

I saw they are preparing an update to the converter:
https://github.com/liangjia2019/zigbee-herdsman-converters/pull/8/files

You can try that early as an external converter, or just wait for their reply / pull request