Can I use an Arduino easiy to monitor 12VDC PIRs etc?

Hardware
1

Hi,

First post and these forums are huge so I’m not sure that this is the right place, please be gentle. :wink:

I am trying to find a way, if it’s even possible, to use and Arduino I have kicking about to nonitor my 12VDC PIRs and, till I made an amazing discovery on someting Home Assistant does, my AV reciever’s 12VDC trigger, so that the HA system knew it was on. The latter now redundant as it has Musicast so that’s not important.

My issue and, I’ve been automating stuff for 30 years or more, is that I rely heavily on the PIRs for motion detection and lighting routines. It’s cheap, it’s rock solid reliable and just works, so long as I can get HAss to see these somehow.

I know there’s a board that is IP based, about £144 or something but the reviews aren’t stellar and I NEED this to work to be able to move from Homeseer to Home Assistant, which I really want to do. So much so that after playing for a day or so with it on a VM I’ve ordered a proper Green so it’s also rock solid reliable.

ATM I use an Arduino connected to HS via a plugin and it’s worked great for some years, all it does is see the state of each PIR with them all havving a common power supply. I was hoping that there was somethign similar for Home Assistant but I can’t find it and my coding skills are, err, non-existent!

Any pointers would be greatly appreciated as I’m sure there’s a way, I just can’t find it.

K.

2

I would suggest an ESP instead of arduino since they are far easier to add to HA.
And using a voltage divider means you can read the voltage from the PIR very easily.

Read up on ESP-Home

EDIT; Just remembered. Search for car battery monitor ESP-Home.
That is what you need

1 Like
3

Thanks I’ll give that a go as I have an ESP32 kicking about.

K.