Ah, found it (21 in hex is 0x0015)
Mine shows as non-neutral. I have a neutral connected; maybe it’s somehow wired incorrectly, I guess.
There are plenty of good basic electronics tutorials you can read that will bring you (somewhat) up to speed. Here’s a good one: Types of Electrical Load | Resistive, Inductive & Capacitive Load - TheElectricalGuy. The power transistor used in the Blue (and Red) 2-1 simply cannot support the combination of current and voltage required for inductive loads. The Blue fan switch CAN, because they’ve used a different architecture.
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No. On/off mode just means it has no fan speed control, just all the way on or all the way off. It’s meant for exhaust fans.
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My switch does have a neutral… but hooked up to two fans, they are running at half speed.
How do I fix this?
I uploaded VZM35-SN_1.08.ota to my zigpy_ota directory… then I restarted my Home Assistant container. That was last night. This morning, none of my switches have updated, they are all still on 0x02020104.
That’s why I assumed 0x02020104 is 1.08
I also tried manually calling the update service:
data:
ieee: 04:87:27:ff:fe:1b:9b:fd
endpoint_id: 1
cluster_type: out
command_type: client
cluster_id: 25
command: 0
args:
- 0
- 100
Are the fans themselves (not the wall switch) set to their highest speed? Most typical ceiling fans have a pull chain on the fan motor to control the different speeds. When used with a speed-controlling wall switch, the fan itself needs to be set on its highest speed.
I recorded a video… in this video it shows 3 fans. These are Hunter Gallegos AC fans, and have no pull chains. The speeds are operated completely by Inovelli VZM35-SN wall switches. The switches are set at “low” (33%) speed.
https://i.imgur.com/nEoXfdf.mp4
The fan in the front is by itself on a switch. You’ll notice the speed. All single fans in my house that are tied to a switch, are running at this speed.
The two fans in the back are tied together, being controlled by a single switch. You’ll notice that the double fans are running slower than the single fan. In two places in my house, I have this two-fan on one-switch setup, and in both places, the fans run slower. To test, I disconnected one of the fans, and the other fan ran at normal speed. It’s only running slower when two fans are connected to the single switch.
Anyone else have opinions on how cumbersome it is to use this switch as a 3-speed fan switch?
You have to hold the switch to change the speed of the fan, and you never really know what speed it’s going to be. It would be easier if you could just hit the up button to cycle between the 3 speeds, and the down button to turn it off.
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+1 on this. I’d prefer it if up increased the speed by 1 and down decreased the speed by one. Then again, that does make turning on and off the fan slower (or maybe you’d have to hold down the button?). It sounds like a “smart bulb mode” like setting should be available, so I figure I might use that and program the behavior I want in Home Assistant once button presses start registering.
up to cycle and down to off I think would be the best solution, as on/off being quicker would be ideal.
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In Hubitat, I programmed the up button to cycle through the speeds and the down button to turn it off. I do agree it would be nice if it did cycle up and down with the button presses. The hold option doesn’t work in my house for the same reason.
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Yeah, oddly, even though the current behavior mimics a standard dimmer I do find it a bit cumbersome. Adjusting the “dimming speed” via parameters 1-8 does help. Luckily, creating an automation where up=cycle_speed is easy to do and results in more intuitive button action.
This is easily accomplished via hub automation (Hubitat, SmartThings, etc.). But I agree it would be a nice built-in feature (selectable via a user parameter/setting) @Eric_Inovelli @EricM_Inovelli what to you think about getting this added to the firmware (P16 perhaps?)
there is a “Smart Fan Mode” available.
I haven’t tried this, but thinking about it, I’m wondering that if you want to use button presses to adjust the fan speed if you want to use the Smart Bulb/Fan mode. That will keep the fan powered full time, and that may make speed adjustments send from the hub ineffective. Disable local control instead, maybe? Not sure, someone will have to try it.
@fisheromega programmed automations with Hubitat. Thoughts?
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Got my 2 Zephyr switches late last week and attempted to install them over the weekend but was unsuccessful. Tried in two different (identical) bathrooms for exhaust fans. Using ZHA in home assistant but not seeing any specific toggles for “exhaust” in this system, the ZHA interface looks almost identical to the light switch… Tried manually setting the device to exhaust but hasn’t made a difference. Unfortunately can’t seem to get the fan to turn on/off manually or using HA.
Button Numbers … I did not see what the button numbers are in the online manual. Did I miss them or are they not listed? I know button 1 is a single click, but what button number is the config button?
Try button 3. I coded a test automation in ST for the config button. The driver doesn’t show the button number, only the label “Config Button”, but the back end reflects button 3 for this automation.
I will do that, thank you. I will also try button 8. That is the config button for the Blue Series 2-1.
Interestingly, I did the same from a Blue 2-1 and it also reflected button 3. 
Firmware 1.04 is the latest for the production hardware. We originally used an MG21 chip and that firmware version went up to 1.08. After we switched to the MG24 the firmware versioning started over and we got up to 1.04. I’m deleting all the other versions as to not be so confusing.
I think we need to open up a case with Hubitat. They might be able to look at some lower level Zigbee logs. Can you open a ticket with them and add my email to it?