Coaxing a manufacturer unsupported reverse cycle air conditioner back into being a smart device

After the pandemic, we decided to upgrade to a larger house. I sold the old one, and we moved into a nicer, larger house. Whilst I've since done some upgrades to the new house, it still has the two reverse cycle air conditioners that it came with.

These are Samsung "The Triangle"  AR09FSSSCWKN and AR24FSSSCWKN units.

Inititally when I moved into the house, I contacted Samsung about how to connect them to the wifi.. and got sent around in circles. Try their SmartThings app. Try the old app. The old app just would not work...

Home Assistant and Tuya - which path did I choose?

Tuya licenses an IoT platform that is VERY popular with the OEMs of various IoT products. If you buy something from a big box IoT store, ALDI, etc., chances are in a lot of cases, it's going to be powered by Tuya technology.

Initially they used chips from Espressif, and these were easily reflashed to other firmwares, but more recently they have moved to using different SoCs which either require physical connection to re-flash OR cannot be reflashed and need to be replaced if you wish to use different firmware.

Tuya does provide a cloud integration for Home Assistant, "Tuya", but it is a cloud integration, which means that to control your local devices, you need to reach out to the Tuya cloud and back to control things.

I don't know about you, but the idea of needing to reach out to the cloud and back to be able to turn something on and off seems counter intuitive. Additionally, the official Tuya cloud integration only supports some devices. So once you connect it to your Tuya account, you might find some devices are seen, but HA cannot provide any control of the device. Work is being undertaken over time for the cloud integration to have broader device support, but it's slow going.

Firewall upgrade

After noting that my long serving Asus RT-AC5300 running Merlin AsusWRT had gone EoL (and had long since had its WiFi duties taken over by two UniFi WiFi 6 Lites), I decided to dip my toe into perhaps a more advanced setup, and set about configuring a small mini-server to host a containerisation and virtualisation solution for my networking needs. It's working, but it's also still a work in progress.