5 ms·

A Bridge Between Some Daikin HVAC Units and MQTT – Rewritten in Ada

19 points by SteveHM 4y ago

SteveHM 4y ago
I just released https://github.com/SMerrony/daikin2mqtt https://github.com/SMerrony/daikin2mqtt which has been entirely rewritten in Ada. It provides a way of using some Daikin HVAC units in home automation software that doesn't have an explicit 'integration' for such devices, or directly with a dashboard like Node-Red.
ajdude 4y ago
I see a lot of efforts to be right software in Rust. People tend to forget that Ada is still alive and well, and I would like to see an initiative to rewrite more software in Ada.
- pyjarrett 4y ago
  Most of us aren't out to rewrite anything. There's not many of us, we're just using Ada to write things. There's a bunch of work at https://alire.ada.dev/ https://alire.ada.dev/
nicolaslem 4y ago
Is this local communication? I could swear when I was in the market for an HVAC I checked Daikin units and they could only be controlled through their cloud. It is the only reason I got a Gree unit that, with some tinkering and proper firewalling, is local only.
- SteveHM 4y ago
  Yes - all local, no 'cloud' at all.
joezydeco 4y ago
I've grown to really appreciate MQTT over the last few years. It's useful in ways I didn't even expect. It's just enough transport over TCP to be useful without resorting to HTTP complexities.
jburgess777 4y ago
Another person reverse engineered the hardware protocol and built a replacement controller which also implements MQTT https://www.revk.uk/2022/04/new-air-con-part-2.html https://www.revk.uk/2022/04/new-air-con-part-2.html https://github.com/revk/ESP32-Daikin https://github.com/revk/ESP32-Daikin
sdflhasjd 4y ago
I wrote something similar for my "TCL" branded indoor unit that had a Tuya adaptor. The Tuya/ESP32 board spoke to the unit's controller through a serial protocol. I flahsed it with Tasmota and enabled the Serial/MQTT bridge. After reverse-enghineering the protocol, I wrote a bridge that took the raw messages, decoded the machine status into an MQTT structure Home Assistant could understand, and vice-versa. Here's a snippet of some of the encode/decode methods if anyone else is trying work with these TCL units. https://pastebin.com/WxBSFgmQ https://pastebin.com/WxBSFgmQ

19 points by SteveHM 4y ago

I just released https://github.com/SMerrony/daikin2mqtt https://github.com/SMerrony/daikin2mqtt which has been entirely rewritten in Ada. It provides a way of using some Daikin HVAC units in home automation software that doesn't have an explicit 'integration' for such devices, or directly with a dashboard like Node-Red.

ajdude 4y ago

I see a lot of efforts to be right software in Rust. People tend to forget that Ada is still alive and well, and I would like to see an initiative to rewrite more software in Ada.

pyjarrett 4y ago
Most of us aren't out to rewrite anything. There's not many of us, we're just using Ada to write things. There's a bunch of work at https://alire.ada.dev/ https://alire.ada.dev/

nicolaslem 4y ago

Is this local communication? I could swear when I was in the market for an HVAC I checked Daikin units and they could only be controlled through their cloud. It is the only reason I got a Gree unit that, with some tinkering and proper firewalling, is local only.

SteveHM 4y ago
Yes - all local, no 'cloud' at all.

joezydeco 4y ago

I've grown to really appreciate MQTT over the last few years. It's useful in ways I didn't even expect. It's just enough transport over TCP to be useful without resorting to HTTP complexities.

jburgess777 4y ago

Another person reverse engineered the hardware protocol and built a replacement controller which also implements MQTT https://www.revk.uk/2022/04/new-air-con-part-2.html https://www.revk.uk/2022/04/new-air-con-part-2.html https://github.com/revk/ESP32-Daikin https://github.com/revk/ESP32-Daikin

sdflhasjd 4y ago

I wrote something similar for my "TCL" branded indoor unit that had a Tuya adaptor. The Tuya/ESP32 board spoke to the unit's controller through a serial protocol. I flahsed it with Tasmota and enabled the Serial/MQTT bridge. After reverse-enghineering the protocol, I wrote a bridge that took the raw messages, decoded the machine status into an MQTT structure Home Assistant could understand, and vice-versa. Here's a snippet of some of the encode/decode methods if anyone else is trying work with these TCL units. https://pastebin.com/WxBSFgmQ https://pastebin.com/WxBSFgmQ