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deepsyx / home-automation

Raspberry Pi 3 based home automation with NodeJS and React Native.
MIT License
3.37k stars 248 forks source link

Thermostat input - why servo? #7

Open bholota opened 7 years ago

bholota commented 7 years ago

@deepsyx Why you used servo instead thermostat input? Most cheap central heating system has those or there is other reason to use servo maybe?

tibo commented 7 years ago

@deepsyx Also curious about how you did this. I've got a really simple heating system in my appartement and I want to add a way to schedule the eating system on top of this kind of button. could you add more pictures on how you manage to setup the servo and which kind of servo you used? Thx!

piranna commented 7 years ago

In the description he says it's about not willing to disassemble the thermostat, so he's using the servo to move the temperature dial himself.

bholota commented 7 years ago

@piranna but there is no need to disassemble anything, there should be external thermostat input available in his heating system. In 99% cases it's simple two pins when connected - heating system is on and opposite for open circuit.

FlorianWendelborn commented 7 years ago

@bholota Can you provide an example of those? Never seen that and I'm wondering if mine has them.

bholota commented 7 years ago

@dodekeract If I remember correctly I've installed baxi mainfour 240f, you can find official manual online, example: official_link.pdf it's low-end heather for Polish standards - you can connect simple external thermostat (I'm using something like that currently, but soon I will replace it with rbpi)

krzyk commented 7 years ago

@bholota Actually in Vaillant you have to take off the metal enclosure of the heater, and then you have access to the the thermostat pins (3-4, 7-8-9 and BUS). But yeah, the one that installed the system should have connected a room thermostat somewhere. Maybe it is also sealed, so he can't take it of the wall?

deepsyx commented 7 years ago

Hello! Unfortunately I do not wanna remove the metal cover, because of warranty reasons. I researched easier ways to accomplish this, but unfortunately the servo was the simplest and cheapest method I found :)

krzyk commented 7 years ago

@deepsyx How did you attach it? I was wondering on using a servo, but I couldn't find good online resources how to fit it to the handles appropriately.