Let me introduce a solution to build a universal air conditioner controller at extremely low hardware cost here. It will control any air conditioner without relying on any external IR libraries and require nearly zero programming. Upon power-on, it can be directly discovered by Home Assistant (requi…

Great write-up, thanks for this!

btw, I left a note to the shop@Ali about why they won't sell to a couple of countries right now. They promissed to get that solved within days (whatever number of days they have in mind).

Good to hear that. Btw I have found an issue with that example code whenI tried to add an ESP8266 as the second controller. I have to say it's not a bug of the code but a rule of the HA, as each device in the network must have a unique ID, but the discovery information is hard coded so you need to …

Any chance of an ESPhome version of the software ? Would feel more at home in the Home Assistant habitat ...

The clickbait “under $5” titles in articles like this cheapen what are otherwise useful articles. I’d love to know where you’re buying your equipment if that’s all you realistically pay.

Don't know if an ESPHome version will come, I think the project I posted here is a HA port of it's original MQTT version, all based on an Arduino library. Anyway it shouldn't be too difficult for someone to port it to ESPHome in the era of AI, I'm sure.

Well I admit $5 is what I think will be the most attractive point, but it's real. I'm in Australia and here is what I just put in my Ali cart. Of course the shipping cost almost doubled the item itself :rofl: [Screenshot 2026-05-09 at 10-05-02 Shopping Cart]

Got news from the shop@ali .... sales to Germany are now re-established, haven't checked for other countries, though.

I've give conversion to ESPHome a go (well me and Claude), [image] GitHub - danfulton72/esphome-bc7215ac-repo: ESPHome config for AC control using bc7215ac on a... ESPHome config for AC control using bc7215ac on a ESP32 TTGO T-Display Not fully tested…

Wow, excellent! I'm definitely going to try it when I finished the current project on hand.

$5 DIY will connect ANY AC to Home Assistant, auto found and ready to use, with ESP32/8266+BC7215A module

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bitstudy (Tim) June 7, 2026, 12:55pm 27

Just posted my project in ESPHome category: