Shelly RGBW2 rebooting with all channels switched on in white mode

[mblackshaw]

I'm really loving this firmware on all my Shellies, but I wound up going down a rabbit hole today when a RGBW2 kept rebooting when I set all channels set to 100% in white mode.

At first I thought it was a wiring error of my own, but I tried disconnecting the device from all wires except power and it still kept rebooting itself. Then I flashed a brand new RGBW2, left it disconnected, set it to white mode and set all channels to 100% and it rebooted too.

Stock firmware runs happily with all channels set to 100%. I tried pulling a core dump from /debug/core to help debug, but it says "No core dump".

I think there is a bug here? Happy to help debug, if you tell me what to do!

[timoschilling]

Does that happens only on 100% or on others as well?

[mblackshaw]

The reboot seems to happens on lower %s as well, just not as fast. As more channels are set to 100% the reboot happens far sooner. Some datapoints:

• 50%, 50%, 50%, 50%: Reboot after ~7mins
• 50%, 50%, 100%, 100%: Reboot after ~3mins
• 50%, 100%, 100%, 100%: Reboot after ~30secs
• 100%, 100%, 100%, 100%: Reboot within 5secs

It doesn't seem to be strictly related to all channels being on either, though it makes it worse:

• Off, Off, 100%, 100%: No reboot after waiting 10mins
• Off, 100%, 100%, 100%: Reboot after ~2mins

The issue is less obvious because the default setting for channel "Initial state" is "Last", so when the reboot happens the lights flicker for a second, but ultimately remain on. It does create a really bad state though when you set all channels to 100%, because you end up in reboot loop that is tricky to recover from.

I also confirmed the behavior as happening in AP mode after factory reset – so it's unrelated to my wifi configuration.

[timoschilling]

Could you test with power saving mode disabled please?

[mblackshaw]

The above tests were done with power saving mode disabled (which was the default after reset).

[Marfre888]

The reboot seems to happens on lower %s as well, just not as fast. As more channels are set to 100% the reboot happens far sooner. Some datapoints:

• 50%, 50%, 50%, 50%: Reboot after ~7mins
• 50%, 50%, 100%, 100%: Reboot after ~3mins
• 50%, 100%, 100%, 100%: Reboot after ~30secs
• 100%, 100%, 100%, 100%: Reboot within 5secs

It doesn't seem to be strictly related to all channels being on either, though it makes it worse:

• Off, Off, 100%, 100%: No reboot after waiting 10mins
• Off, 100%, 100%, 100%: Reboot after ~2mins

The issue is less obvious because the default setting for channel "Initial state" is "Last", so when the reboot happens the lights flicker for a second, but ultimately remain on. It does create a really bad state though when you set all channels to 100%, because you end up in reboot loop that is tricky to recover from.

I also confirmed the behavior as happening in AP mode after factory reset – so it's unrelated to my wifi configuration.

I've noticed mine rebooting every couple seconds, after flashing the firmware. To be honest, I was concerned that I was overloaded the power supply at max brightness, but then magically the problem went away, and I don't believe it reboots anymore.

Random thought, could it be because you haven't added it into homekit yet?

[mblackshaw]

Random thought, could it be because you haven't added it into homekit yet?

Unfortunately HomeKit pairing doesn't have any effect on this for me. For now, I've had to fall back to stock firmware (now going on 11 days continuous uptime).

[timoschilling]

Sounds like a bug in the underlying pwm mongoose lib for me. @rojer any ideas?

[matthias-zivim]

I can confirm the problem in CCT mode. When I set this to 100%, the restarts begin. As an example, I set the channel to max 95% the shelly RGBW2 is stable. Power saving mode off/1/2 does not matter.
Thank you all for the great work!

[Tony3b]

Hello all,
I have the same problems with my Shelly RGBW2.
Mine also reboot when you set the brightness to 100%. It does not matter in which mode the Shelly's are operated.
Is there currently already a solution to the problem?

Tony

[Tony3b]

@rojer, did you have some infos for us about that situation with the rgbw2?

[dunker86]

I am also experiencing the exact same issue. With multiple channels at 100% the reboot happens almost instantly. Anything over 85% for any period of time is consistently unreliable for me. I’m hoping it turns out to be an easy fix (really appreciate the effort by all contributors)!

[timoschilling]

@rojer it must be something special to the shelly rgbw2, it's not reproducible on a esp8266 dev board.

[Tony3b]

Is there any news about the bug?

[timoschilling]

I can't reproduce the cases where some users say it happens with values lower then 100%. I have my Shelly running with 99% on 4 channels over hours without problem.

After hours (nights) of debugging I think I found a solution, which should make the Shelly stable at 100%.
Hier is a test build: rgbw2-1161.zip

Now I need to grab some coffin, maybe you like to support me with some ☕ http://paypal.me/timoschilling

[matthias-zivim]

👍 Vielen Dank....sieht gut aus. Das Problem scheint weg. Noch besser ist der Dark Mode 😎
Die 20 Euro sind von mir. Danke
PS: Kannst Du was zu rojer sagen? Wird er das Projekt weiter pflegen?

👍 Many thanks....looks good. The problem seems to be gone. Even better is the dark mode 😎
The 20 euros are from me. Thanks
PS: Can you say something about rojer? Will he continue to maintain the project?

[timoschilling]

Thanks for the support! Rojer now works for Shelly, he announced that he will not invest many time in the future. I hope he will support us on heavy low level issues. I will take care about the general maintaining.

[timoschilling]

PS: On my route map is support for the Plus 2PM and all Pro models.

[matthias-zivim]

The Plus 2PM models! Three of them are lying here waiting to be used.

Shelly Plus Plug S ?

[timoschilling]

@matthias-zivim oh, yes plus plugs too, at the moment I didn't have any test devices.

[Tony3b]

@timoschilling
Hello Timo.
I installed your update (thank you). Unfortunately it didn't bring any improvement. Currently there is a reboot for almost every change. The RGBW2 is therefore no longer usable.

[matthias-zivim]

Hi, yes too bad, can confirm it! eg when simply turn off, it crashes

[sargonphin]

Hello, I would like to confirm that this problem still exists. Even worse, the dimmer might be affected as well, albeit far less frequently, but I cannot confirm this for sure. It could be the automated firmware updates that are triggered by iobroker that resets the device every now-and-then

We have 3 RGBW2 units where 2 of them in the hallway that has been running perfectly without problems for a while now and at high power too, and another one in the bedroom running at very low power but constantly turns off then resets to last state (worth noting that the delay between shutdowns is variable and has a very large span, could be hours or could be seconds). I have a feeling this is power-supply related, it could be the Shelly back-feeding some interference that resonates with the power supply and shutting it down or resetting it (I have seen that before on cheap supplies).

The supply of the working Shelly's in the hallway is a high-quality powerful Meanwell 24V supply where the "faulty" Shelly in the bedroom is using a no-name Chineesium small 12V supply. We are planning to replace this no-name supply for a better quality Meanwell and test the outcome.

Interestingly enough (and this is important), we seem to have 2 different flavors of Shelly's in the hallway because they both are running different branches of firmware: one is running 20230913-113259/v1.14.0-gcb84623 and the other is running 20230913-131259/v1.14.0-gcb84623. The "faulty" Shelly in the bedroom is running the same firmware version 20230913-113259/v1.14.0-gcb84623 which proves this is not firmware related (hence why we thought about power supply)

I will let you know when we replace the supply if the problem still persists :)

[mlloydphoto]

Hi, I spent today swapping all my old aurora LED strip controllers over to Shelly ones now that CCT is supported - have been waiting years for a CCT controller compatible with homekit. Had loads of problems with 3/10 of them on connection issues and had to write them off, couldnt get them to make a stable connection they kept dropping off the wifi - and once a unit was flashed with mongoose and it dropped off the network it was impossible to get a connection stable enough to flash it back to stock firmware. I just updated the firmware on the last one, It was functioning fine for a couple of minutes, but after playing with the brightness controls a few times and moving it up to 100% and down it just stopped responding and then dropped off the network totally . any ideas on getting it back up and running and whether theres still issues on this?

[mlloydphoto]

Slightly more clear idea of the error

The RGBW2 crashed after fiddling with brightness levels (was working fine on stock for a bit before I upgraded to mongoose). After it crashes it disappears off the network, I have to factory reset the RGBW2 using the button. I then access the wifi network for the RGBW and try to reconnect it to my wifi but it wont connect, just keeps saying "Not connected (reverted), AP active", The light IS working correctly when Im connected to its network, I can turn it up or down. but when I put all the 4 white channels up to full it crashes again kicking me off the network [close] Connection died (code 1006)

Any ideas please, I cant flash it back to stock firmware when connected to its network and I cant get it back onto my wifi

[josetavares83]

Hi
Same problem here: when I turn on more then 1 channel (white mode) it reboots. Should I provide any further details to help fix this issue? Thks

[campino60]

Hello everyone,

I'm brand new here and found my way here through the Shelly Homekit FW.
Thanks for this project, it is very easy to install and works very well so far.

However, I have the same error as described here in this thread.

I have installed approx. 3 x 1.5m RGBW 24V Led Stripes with 3 x Shelly RGBW2 controllers.
The power of the power supply (100W) and also the power of the Shelly is not overloaded.

I also have the problem that when I operate the LEDs in RGB mode above 95%, the controllers reboot at irregular intervals.

In pure white mode I have (not yet) also noticed this error.

I hope there is a solution to this error

[bullox]

Facing similar issues. After messing about, I'm not actually sure it's just a CCT/brightness issue...

I'm running a couple of CCT strips from an RGBW2, on 24V, well below max rating per channel. First encountered issue when turning on both strips and switching one from warm to cool white. But have been trying to diagnose and it's been resetting at other times too. Tried in RGBW mode, and similar reset happens, mainly when messing with channels quickly, but that might just be coincidence too.

Tried @timoschilling firmware from Feb 2023, but same issue. Happy to try more diagnosis, would love to get this working.

[campino60]

A short update
Shelly RGBW2 works without any problems when the brightness is set to 95%
no matter if W or RGB
no reboot or hang up