Control a Mitsubishi heatpump using Particle Photon, Cloud, and MQTT

Social Project Share
1

Made a little project and figured I’d share it here:

It’s a ready-to-go firmware app for controlling a Mitsubishi air conditioner / heatpump (often branded “Mr Slim”). Plenty of projects to do this on Arduino and ESP, but I love Particle hardware and cloud.

You can monitor status and control the device through Particle Cloud, MQTT, or both. Enjoy!

6 Likes
2

How did you connect to the Mr.Slim controller and did you dispense with the user interface? Thanks

3

Oh yeah, left that out!

So these devices have a diagnostic UART port and connector inside; makes it really easy. You can see a pinout at the upstream library’s project page:

cheers

1 Like