Finally in terms of 💸:

800€ (extractor fan with humidistat) vs 86€ (Shelly 2PM Gen3 + 3 Shelly BLU H&T sensors)

Not only this is less expensive, but also provides more features.

Me happy 😁

Finally, my #HomeAssistant auto-discovered all these devices automatically, which gives me access to all the temperature & humidity data for free. I can also manually control the relays if I ever needed and I have the energy data on top of that.

Really, 10/10 for #shelly, absolute banger.

Naturally, I bought this + 3 Shelly BLU H&T sensors (one for each bathroom) The setup was extremelly easy, I even created my own script (because I forgot to mention but you can create scripts, which also run locally!) to manage the relays based on custom logic.

This is where #Shelly starts shinning. With the Gen3 and BLU products line, these devices can talk to each other over the protocol #BTHome.

That means a Shelly 2PM Gen3 can receive local #bluetooth communication from BLU devices and perform actions (aka #automations) LOCALLY! No other dependencies

Ok, next. How to control these relays? I could buy randoms ones, integrate them into #HomeAssistant and create some #automations. But there is a problem there: it needs HomeAssistant to run and I don't want my extractor fan unit to be dependent on that. It needs to run on its own.

I dug deeper.

Issue #1: all extractor fans had to be replaced, not only the centralised unit.

Issue #2: thanks to #1, the cost just bumped significantly. Almost 800€

I needed another solution:

I have a #HomeAssistant server. Can I control a classic low/high speed extractor fan unit? With relays, that's a yes!

My centralised bathroom extractor fans unit is dead so I've asked around for quotes. The setup in my house is 4 fans for 3 bathrooms and one toilet. The dead unit is a classic one, aka "dumb" and I wanted to put something more performant, i.e. controlled by humidistat.

That introduced few issues.

I also need to debug my #octoprint setup:
1. I cannot enable SSH on my headless setup. The classic ssh file on the boot partition doesn't work, don't know why
2. The upload of gcode from #prusaslicer 2.9.0 crashes the octoprint service!! 😱 It was working fine with previous version

I also need to check and fasten all moving parts. My bed leveling is ok but I have print failures due to bed adhesion once the parts get close to the edges