Recently I went through some pain with this myself. Had a full Heatmiser setup with wireless receivers in every room and 2 manifold controllers for our underfloor heating on two floors.

The devices ate batteries like nothing I’ve seen before and regularly dropped off the network and didn’t send call to heat signals properly, so I decided to switch out the thermostats for cheap ZigBee temperature sensors.

I then ordered a relay board from AliExpress with a baked in esp8266 cheap and flashed esphome onto it. These replaced my manifold controllers

After trial and error, I now have my heating system run by esphome and home assistant. It has been faultless! Will probably reinstall the Heatmiser kit if I sold the house though

I use S3 sync via the cli and use lifecycle policies to manage number of snapshots and deletion.

Some cool options for moving files to different tiers like cold and glacier but I don’t know enough about it or the retrieval costs to use it just yet