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I should probably put a smart temperature sensor in there
Connect a DS18B20 (and a 4.7k resister) to the Raspberry Pi
with hindsight the two switches should have been at the top
Why two switches and not just one bigger one?
jellybaby-
Ah I've heard of those, will look into it, ta.
I was originally going to buy the Unifi Switch Lite 16 which seemed perfect for my needs, but they randomly brick themselves. A rack mounted switch would have been too big, so I settled on two 8 port switches.
The plan was to run one switch from the LAN1 port on my USG and the other from the LAN2, thereby avoiding a single point of failure. Unfortunately that seems to mean having to have LAN2 on a different subnet and I haven't found a way around this.
So I could get internet to the stuff on LAN2 but it couldn't talk to the stuff on LAN1, and now the Netgear dumb switch is just plugged into the Unifi switch.
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Why two switches and not just one bigger one?
Check the count of cables... One would've been fine. So I'll assume he's done what I've done and future proofed it as a single one would be near max and this allows expansion... Plus it's probably what he has at hand.
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Connect a DS18B20 (and a 4.7k resister) to the Raspberry Pi
@fox I've got a few of those sensors going spare. Happy to pop one in the post to you. Mine have the resistor built in.
Fox
Velocio
Stonehedge
Thanks, you have identified the obvious flaw but it's been fine so far. I guess this summer will be the test if we get some really hot days. I should probably put a smart temperature sensor in there to measure the air temperature.
The Raspberry Pi running Home Assistant (bottom left) has active cooling and it's never got hot enough to set off the fan, and the Unifi kit seems designed to run hot. All the power supplies except the Anker USB one are behind the plywood so I think that helps spread the heat out.
If it does become an issue I have options - putting a vent tile in the roof (optionally with a Noctua fan at the bottom of the pipe which activates above a certain temperature) or actually putting insulation between the plasterboard in the eaves and the roof because for some reason whoever built it didn't (I presume there's no reason not to do this, but I haven't looked into it yet).
I need to order some short USB-C cables but looking at these photos is making me want to rearrange everything - with hindsight the two switches should have been at the top!