I’ve been on the hunt for the “best” BLE-capable ESP32 devices to use with BLErry and ESPresense. Problem is that the ESP32 isn’t nearly as popular as ESP8266 in the IoT world.

CloudFree’s Light Switch is quite good but I discovered it way too late in the process of changing out my light switches. I have a few m5stack Atom Lite in use and ordered some LILYGO T-Dongle-S3 to mess with but the more I think about it the less I like the idea of infrastructure hanging off USB ports and wall plugs.

What I really want is a cheap ESP32 in the form of a wall wart or smart plug.

Enter the SwitchBot Smart Plug Mini*. It’s cheap — under $25 for a 4-pack on Black Friday sales. It has the ESP32-C3. It’s not at all friendly to opening, however, presently it is possible to OTA flash to Tasmota. And it has power monitoring, which is an uncommon feature in a cheap Tasmota plug. There’s not an official esp32c3-bluetooth build yet but they’re available from other sources and it’s not that difficult to roll your own.

SwitchBot’s Smart Bulbs are also ESP32-C3 and convertible to Tasmota, but I’m trying to keep away from bulbs.

I’ve also been eyeing the GL.iNet GL-S10, a $25 ESP32 device with Ethernet and PoE, but I’m resisting until it’s available from a US-based seller. The thing has been available for over a year and GL.iNet has plenty of US distribution for other products so I don’t get what the hold up has been.

* 11/21/2022 Update: After getting my hands on the Switchbot I would be cautious about using it for productive loads as it will not hold the relay state during a reboot or firmware update. This appears to be a hardware design decision. In theory that’s not a big deal — your Tasmota device shouldn’t be rebooting itself and if it ain’t broke don’t update — but it’s one of those footguns that’s likely to be forgotten about until it takes out a toe.

I’ve now installed 54 smart switches, dimmers, and relays of 8 varieties, plus mounted a dozen remotes. Six switch locations remain but they’re all unimportant.

If I had to do it all over again, I would make the CloudFree Light Switch and Amaker WKC-002 Zigbee my default switches. Those and the Lutrons have metal tabs and I’ve found they’re much easier to get properly aligned and flush with the wall plate in a multi-gang box. All the rest with plastic tabs have been challenging, the Martin Jerry Zigbee model most of all because the tabs are narrower. I also like the CloudFree Light Switch for having what I consider to be a premium feel. The Amaker was a nice late addition, it feels cheap but best conveys that you’ve successfully pressed it and it functions as a Zigbee router. The Lutrons feel like cheap junk but there are very few cloud-free no-neutral dimmer options.

An added perk with the CloudFree Light Switch is that it runs on an ESP32-C3 (RISC-V) chip which has Bluetooth / BLE instead of one of the more common ESP8266 variants that only do Wi-Fi. Took me maybe 30 minutes to roll my own Tasmota image with BLErry and get it feeding a BLE temperature / humidity sensor into Home Assistant. Shouldn’t be challenging to get it doing the same on ESPHome but I’m unlikely to try that myself.

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