velhacontaB
It will. But this is a problem you created. Should not have been buying WiFi devices.
I preach this to anyone who will listen here. Buy devices that use low-latency mesh networks. WiFi was not designed for turning lights on and off. Zigbee/Zwave/Matter were.
WiFi is for high-bandwidth, high-latency devices. Your computer, phone, TV, etc…
Home automation devices should be on a low-bandwidth, low-latency network like the popular mesh networks I mentioned above.
What does it control? Is it a proper AC with compressor or just a fancy fan?
If this is a thermostat controlling a compressor you don’t want to go replacing it with just relays or it will be very easy to kill your compressor.
But you could program and ESP board as a thermostat to do it for you. ESPHome has some off-the-shelf libraries for this.
If it is just a fan, a relay would allow you to turn it on an off. But you still probably won’t be able to change speed because it probably does PWD to control fan speed. This could also be solved with an ESP running motor controller code.
Show me how to control an HDMI matrix and multi-channel amp through Alexa or similar consumer controller.
If you want to DIY AV distribution you probably need Home Assistant, very specific hardware it support and a lot of time to learn how. With Control4 you just plug in the hardware, tell it which channels are wire to which rooms and you are done.
FYI - that is not a 3 gang. A 3 gang is a box wide enough for 3 standard decora switches. Those a 3 switches in a single gang.
Does it need to be a button you press? If so, the app IFTTT can provide you a button on your phone screen that you can to send a request to an Alexa type device in the garage to do whatever.
But perhaps that is not the best approach. Have you considered a motion detector in front of the garage doing the same? If you don’t have traffic in front of the garage, this might be a better option.
Relays always click. Some much louder than others. If these are for lights, get dimmers. They never click because they don’t use mechanical solenoid relays.
Repeaters no the be always on.
Getting repeaters that you frequently turn on and off will make your network topology a mess. Traffic will always have to be finding new routes through the network depending on the combination of repeaters that are on and off at any one time.
You could also create the situation where certain parts of your network are only reachable when certain lights are on.
Repeater switches that are always on make sense. That is what I did.
Repeaters bulbs that could be powered off do not.
I don’t think there are any products on the market to replace that setup as is.
You are going to have to cut the wall and double up (which would have bee the right way for the original installer to do this).