@alias51 @JDRoberts
I have been looking for a solution to a similar requirement. I am looking for an inline switch suitable to use with a momentary pull cord switch for use in a bathroom.
I think I have found something suitable but it is only sold in America and whilst I might be able to get some shipped to the UK I was hoping to find someone first who had already used it to get some feed back.
See my post here - Zigbee micro module and momentary switch (UK)
and the product here - https://rgbgenie.com/?product=zigbee-3-0-plus-micro-controller-and-lamp-module-single-channel-trailing-edge-dimmer
The above module is Zigbee 3.0 and supports both HA and LL with LL being what Philips Hue uses. The only problem I see - for me at least is that whilst it would work with both Smartthings and Philips Hue it probably would not be exposed by the Philips Hue bridge to Apple’s HomeKit which is what I also want.