Shelly Dimmer 2 - Single, momentary switch with automatic dimmer

[Oo80]

Device Name: Shelly Dimmer 2
URL to Device: https://shelly.cloud/knowledge-base/devices/shelly-dimmer-2
Used HAA versions: 12+
Summary of functions: Single, momentary switch controls on/off and automatic dimmer.
JSON:

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}

Long description:

• Light on/off on single press.
• Auto dimmer on press and hold (halt on release).
• Full range dimmer from 50 to 950 (closer to extremes doesn't seem to have any effect on most bulbs).
• Smooth fading (total of 50 steps between 1% and 100%).
• Slightly modified brightness curve (steps are smaller closer to 0% and 100%).
• Internal temperatur (visible in HAA manager app) and auto power off at 66°C.

Documentation:
A long thread about UART messages and how to control the specific hardware in the Shelly Dimmers: arendst/Tasmota#6914

[kurtdwarwick]

Hi @Oo80

Thank you for this! I just wanted to find out if this has been tested with LED bulbs. I have switched to this config from the one defined in the Wiki, and I see no change in brightness transitions. When I turn off / on it's instant, as is changes to the brightness level.

It would be so great to be able to have smooth transitions for the Shelly devices.

Thanks!

Kurt

[kurtdwarwick]

Hi @Oo80

Yes, that's correct. When changing the brightness, it does change, but happens instantly, without a smooth transition.

There is no driver for the bulb, it's a straight up 7w LED bulb with an E27 fitting. It worked absolutely fine with the stock Shelly firmware (in terms of transition), but I have not been able to get it to have smoothness with HAA.

When you state that you have the same behavior, do you mean yours are showing smooth transition?

Thanks

Kurt

[kurtdwarwick]

To add - I am running it at 240v. I am not sure if that makes any difference.

Kurt

[Oo80]

Hi @kurtwarwick-new,

• "Same" referring to all my light sources behaving the same way.
• I have some transition when changing with the Apple Home app – maybe around 100 milliseconds at longest. This is probably the same as you call instantly 😜
• Don't know if the voltage affects this, but my guess is it doesn't. I have something around 235 V.

/Pontus

[kurtdwarwick]

Hey

Thanks for the response! Yeah, I would say 100ms is probably what I am seeing.

I assume there is no way to extend that value? If I were to compare the transition between 2 brightness levels with stock firmware, it's certainly a more pleasing experience than the 100ms we are seeing with HAA.

Thanks :)

Kurt

[Oo80]

I'm writing a separate post on this, hold on

[Oo80]

@kurtwarwick-new I will try to sum up my findings regarding the UART message and transitions in this separate post.

I did do some tests with transition time, but I couldn't see any difference, even when I tried with longer times like 3 seconds (and since I don't care so much for it personally, I didn't spend more time on it 🤷🏻).

You can send either a longer or a shorter form of UART message, the longer including a number to define a transition time. I've added spaces for clarity, those should be removed in the JSON.
In both the short and long message the two bytes 32 00 are brightness level 5.0% (change this to actually see any light). In the long message four additional bytes are added, the last two are always 00 00.

Short UART with 2 byte payload: 01cc0202 3200 010204
Long UART with 6 byte payload: 01cc0206 3200 f401 0000 01fb04

f4 01 are representing the number 500 milliseconds (bytes are sent in reverse order, 1f4 in hexadecimal equals 500 in decimal).
You should be able to replace the UART message string (in the JSON above) with a similar one including transition time (since the JSON is very large I would have removed most of the "steps" (38%, 40% etc.) when doing testing).

All this, including details for the UART messages, are described in this thread: arendst/Tasmota#6914

[kurtdwarwick]

Hi @Oo80

Thanks for that very descriptive response - it's much appreciated.

I tried out a few things and I also see absolutely no change in the transition time. I have a very strict WAF, and without the transitions, I am not able to fulfill that mandate 😄

I see that there are a number of TRIAC dimmers supported, and from some of the video clips I have seen of those working with HAA, they have smooth transitions, so I may just have get a couple of those.

None the less, thank you for your assistance!

Regards.

[tokamac]

Hi @Oo80, today I tested your JSON on a brand new Shelly Dimmer 2, flashed with yaourdt's OTA flasher. While the syntax of your JSON appears to pass JSON validators, it is reported as being invalid in HAA's interface, either using stock HAA 6.x but also after upgrade to latest version available now, HAA 10.3.0 Kestrel.

On the contrary, @RavenSystem's shorter code (that has less steps for brightness modification) available at the bottom of the page Devices Database works.

[Oo80]

Hi, interesting. I haven't upgraded in quite some time so this was news to me. I don't have the time to look in to it right now, will try to remember to comment here when I find the time in the future.

[kivanc87]

Hi Moes Ms-105 how do i fit the model

[pifiuk]

For anyone else running into this same problem, I reduced the amount of steps increasing by 2 from 7-95 and it seems to be happy with that.

{"c":{"f":10,"r":[{"n":0}],"l":16,"b":[{"g":13,"t":5}]},"a":[{"0":{"u":[{"v":"01cc0202000000d004"}]},"t":30,"e":1,"d":0.02,"f0":[{"g":14,"p":0,"t":0}],"f1":[{"g":14,"p":0,"i":1}],"y0":[{"0":{"u":[{"v":"01cc02025500012504"}]},"v":7},{"0":{"u":[{"v":"01cc02026100013104"}]},"v":9},{"0":{"u":[{"v":"01cc02026f00013f04"}]},"v":11},{"0":{"u":[{"v":"01cc02027d00014d04"}]},"v":13},{"0":{"u":[{"v":"01cc02028c00015c04"}]},"v":15},{"0":{"u":[{"v":"01cc02029c00016c04"}]},"v":17},{"0":{"u":[{"v":"01cc0202ad00017d04"}]},"v":19},{"0":{"u":[{"v":"01cc0202be00018e04"}]},"v":21},{"0":{"u":[{"v":"01cc0202d10001a104"}]},"v":23},{"0":{"u":[{"v":"01cc0202e50001b504"}]},"v":25},{"0":{"u":[{"v":"01cc0202fa0001ca04"}]},"v":27},{"0":{"u":[{"v":"01cc02020f0100e004"}]},"v":29},{"0":{"u":[{"v":"01cc0202260100f704"}]},"v":31},{"0":{"u":[{"v":"01cc02023e01010f04"}]},"v":33},{"0":{"u":[{"v":"01cc02025601012704"}]},"v":35},{"0":{"u":[{"v":"01cc02026f01014004"}]},"v":37},{"0":{"u":[{"v":"01cc02028901015a04"}]},"v":39},{"0":{"u":[{"v":"01cc0202a301017404"}]},"v":41},{"0":{"u":[{"v":"01cc0202be01018f04"}]},"v":43},{"0":{"u":[{"v":"01cc0202d90101aa04"}]},"v":45},{"0":{"u":[{"v":"01cc0202f40101c504"}]},"v":47},{"0":{"u":[{"v":"01cc02020f0200e104"}]},"v":49},{"0":{"u":[{"v":"01cc0202290200fb04"}]},"v":51},{"0":{"u":[{"v":"01cc02024302011504"}]},"v":53},{"0":{"u":[{"v":"01cc02025d02012f04"}]},"v":55},{"0":{"u":[{"v":"01cc02027502014704"}]},"v":57},{"0":{"u":[{"v":"01cc02028d02015f04"}]},"v":59},{"0":{"u":[{"v":"01cc0202a402017604"}]},"v":61},{"0":{"u":[{"v":"01cc0202ba02018c04"}]},"v":63},{"0":{"u":[{"v":"01cc0202cf0201a104"}]},"v":65},{"0":{"u":[{"v":"01cc0202e30201b504"}]},"v":67},{"0":{"u":[{"v":"01cc0202f60201c804"}]},"v":69},{"0":{"u":[{"v":"01cc0202080300db04"}]},"v":71},{"0":{"u":[{"v":"01cc0202190300ec04"}]},"v":73},{"0":{"u":[{"v":"01cc0202290300fc04"}]},"v":75},{"0":{"u":[{"v":"01cc02023903010c04"}]},"v":77},{"0":{"u":[{"v":"01cc02024703011a04"}]},"v":79},{"0":{"u":[{"v":"01cc02025503012804"}]},"v":81},{"0":{"u":[{"v":"01cc02026203013504"}]},"v":83},{"0":{"u":[{"v":"01cc02026e03014104"}]},"v":85},{"0":{"u":[{"v":"01cc02027903014c04"}]},"v":87},{"0":{"u":[{"v":"01cc02028403015704"}]},"v":89},{"0":{"u":[{"v":"01cc02028f03016204"}]},"v":91},{"0":{"u":[{"v":"01cc02029803016b04"}]},"v":93},{"0":{"u":[{"v":"01cc0202a103017404"}]},"v":95}],"es":[{"0":{"m":[[1,-2],[1,-20001]]},"1":{"m":[[1,-20000],[1,-1]]},"t":1,"h":2,"b":[{"g":14,"p":0,"i":1},{"g":14,"t":0}]},{"t":22,"h":2,"n":5,"y0":[{"0":{"m":[[1]]},"v":66,"r":1}]}]}]}

[shadowgrapher]

Did you mean that resumes smooth transition?

[Hanimaniac]

Is there a possibility, that while press and holding the momentary switch, the brightness change ends at 100% or 0%?
When i hold the switch, it changes always 0% -> 100% -> 0% and so on. I have other zigbee dimmer, where it automatically stops at 100% or 0%.

Thanks
Hanimaniac

[RavenSystem]

@Oo80 , with a wildcard action at 100 of brightness, that stop autodimmer.

[lucas-figueiredo]

that’s what I was wondering. I’ll try to do it tonight and will report back.

[lucas-figueiredo]

I fiddled with this to try and update it to the new format (with "io"). Here's what I managed to get working:

{
	"c":
		{"r":[{"n":0}],
		"l":16,
		"b":[[13,5]],
		"io":[[[16],2],[[13],6],[[12,14],6,0,1]]},
	"a":
		[{"0":{"u":[{"v":"01cc0202000000d004"}]},
		"t":30,
		"e":1,
		"d":0.05,
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		"f1":[[14]],
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Had to remove "f":10 and changed "d" to 0.05 to make the transition a bit slower.

I've yet to find a way to do what @Hanimaniac mentions in the previous comment, but I'd like to -- if anybody has any idea how.

[Oo80]

Hi,
Sorry for the absence I have updated the original post with the code I'm currently using. It's updated for version 12+ and uses 50 steps.

@Hanimaniac @lucas-figueiredo If I remember correctly there are no support for this, but I might be wrong.

[lucas-figueiredo]

This seems to work, stopping auto dimmer at 100% when going up, and at 0% when going down.
I'm having unrelated issues adding the device to my home app, so I couldn't test it fully, but physically it works.

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[sercontri]

Hello, I see that it's been a long time since it was written in the thread, but I'm very green with this topic and I don't find it much sense without having something to compare...
I have put 3 lines of cob Triac led spotlights with different drivers in each of them.
I have the shelly dimmer 2 in HAA (latest version) and I have tested the script of the template but it does not work well without seeing linear changes in brightness. One of the drivers has an operating range of 5% to 100% and the other two have a range of 10% to 100%.
If someone can help me with the script or explain it to me, I would appreciate it. Greetings and thank you very much.
Now I'm wearing this:

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[sercontri]

I have also tried this one and it is more fluid but from 70% to 100% there are almost no changes in brightness.

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