SwitchBotSmart Relay Switch 2PM, Power Monitoring, Smart Relay Module with Built-in Bluetooth Repeater, Wi-Fi&Bluetooth Switch Works with Alexa/Apple Home/Google Home/Matter Hub Required, 2.4GHz, 16A

The price is £26.99 at the time of review and while it is good value for money, it can be lower compared to other similar products on Amazon. Glad I ordered as it has been useful, but maybe a bit of mixed feelings. This product is suitable for those who want to automate two circuits—like lights and fans—without rewiring everything. Its main functionalities include remote control via Alexa/Google Home, energy monitoring, and creating custom automation scenes through the app. You can even pair it with sensors to trigger actions like turning on lights when motion’s detected.What I loved most was how the build quality is solid—the V0 flameproof casing feels sturdy, and the 16A rating handles heavy loads without heating up. The ease of use is decent once you’re past the initial setup; the app’s energy graphs helped me spot which appliances were draining power. On the flip side, the instructions are vague—I had to watch YouTube tutorials to figure out wiring, especially since my older switch box lacked a neutral wire. Also, the 2.4GHz Wi-Fi requirement caused hiccups until I moved my router closer.If you’re intending to buy this, then I’d advise to consider whether your switch box has a neutral wire and enough depth—mine barely fit, and I had to adjust the wiring. Double-check compatibility with your smart home setup (Matter support’s great, but some hubs might need tweaking). The copper-nickel contacts are reliable, but if you’re not comfy with basic electrical work, maybe get a pro to install it. For the price, the control are neat, though the app could be more intuitive. If your priority’s long-term energy savings over plug-and-play simplicity, this’ll do the job.

This is a two "gang" relay switch that is designed to be small enough to fit in the back box behind your light switch. There are two issues for me with this, my back boxes are thin and there is not enough room in them and secondly this relay requires the negative on the power supply when my switch back boxes only have two wires the supply and switched return. If you don't have the negative wire you either need to rewire or install the relay back in the lighting circuit in the loft or under the floorboards where you can access the circuit including the negative. You may have to change things around a bit depending on loops in your wiring. You can still use the old wiring to the switch. This negative wire is commonly required and this is not unique to this relay.Once you actually get it installed it needs joining to the network and there is no explanation included of how to do this. I got the SwitchBot app from the Play Store and set up an account in order to set the relay up then you have to load the service/integration/helper to run it from your Alexa or Google etc.As I don't want to control the relay from the SwitchBot app (I have too many other control apps) I need to integrate it in to my Home Assistant. To do this I needed the SwitchBot bluetooth integration.This particular relay benefits from having two relays built in so you can control two lighting circuits just like a double gang light switch.If you have other Switchbot devices you can form a bluetooth network where the devices work as repeaters, a sort of bluetooth version of zigbee.

This unit operates much like the other variations of relay switch you can hide behind a lightswitch. Itself the unit is tiny and just a little larger than the single relay Sonoff MiniR4's.The unit supports matter although I don't currently have a hub to test this. For now I've been using the mobile app to control the lounge lights via bluetooth which works well & shows the power being consumed when switched on.Ideally I wanted to use this with Home Assistant but the double relay version of the switchbot we have here is not currently supported unlike the single relay version. Their site does show that this functionality should be available this month (May 2025) so will wait and see.For those that may want to install ESPHome the device is an ESP32-C3 connected to a HLW8112 power monitor and has connection points to all the standard programming pins which can be accessed by removing the bottom cover which is held on with a few clips. One thing I'm not sure about is if the chip is locked down at-all...

I installed the SwitchBot Smart Relay Switch 2PM in my UK home to control a ceiling light and monitor energy usage. It works well and is compact enough to fit behind a switch or inside a consumer unit. It supports both Wi-Fi and Bluetooth. The power monitoring is accurate, and the app is easy to use. One important thing for UK users: you must have a neutral wire at the switch point, which some older UK homes may not have. The terminals are also quite small for UK solid-core wiring, so I used ferrules for a better connection. Overall, it's a great smart relay if your wiring supports it and you’re comfortable doing the installation or hiring an electrician.