Electrical configuration

richdyer2000 / shutterberry

Raspberry Pi velux shutter project - to be expanded to home automation in general

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Electrical configuration #4

Open driesken opened 6 years ago

driesken commented 6 years ago

Sorry for creating an issue for this. Do you have some more documentation about your setup perhaps?

Does it use the same cabling as the setup you originally replied to? Does this need an Arduino or does it work with the relays board as shown on this page? http://egrasland.blogspot.be/2014/01/control-your-velux-roller-shutter-with.html

richdyer2000 commented 6 years ago

Hi - no problems.

To activate the remotes for the velux roof shutters, I just use the raspberry pi and the relay board. There is no bridging between my relays like in the blog, but instead i have 2 wires for each button such that each relay really creates a short between the outer contact and the inner one when it closes. I may be using different GPIO pins too.

The motors for my main window shutters are cabled to controllers in the fuse boxes on each floor which can be triggered in much the same way as the velux remotes - i.e. you just short out two terminals to simulate a button press. The RPi controls the downstairs ones directly via a second relay board, and the upstairs ones are controlled indirectly via an NRF24l01 link to an Arduino nano which then commands the 3rd relay board.

driesken commented 6 years ago

Hi Rich,

Thanks, I've just ordered a relay board as well. Soldering the inner and outer rings of those contacts sounds like a good idea (so only the GND of the relay board is used instead of connecting some bridged relay to the GND of the RPI?).

I'm just wondering where the Velux remote controller draws it's power from on the RPI? Are there some specific soldering points on the bottom that can be used for this? Or are you powering the relay board directly?

richdyer2000 commented 6 years ago

To (hopefully) make it clear, here's a diagram I hacked together with just one button controlled by an arbitrary GPIO Pin - my hardware is quite hard to get to.

The velux controller is normally powered by two AAA batteries, so you can just use the RPi 3.3V and any ground line (including the one you use to power the relay board). There are points on the velux board where you can solder the lines.
Each individual relay has 3 screw connections - referring to this diagram you can in principle use either the middle and top, or middle and bottom as long as you setup and control your GPIOs consistently. I can't remember which way round it is, but to avoid any unintended button presses during startup etc, you should wire the relay such that the outer ring and inner dot are unconnected when the relay board is unpowered. This also means that the LED for the individual relay will only come on when the relay closes and you activate the button on the remote.

driesken commented 6 years ago

It's perfectly clear now with your scheme! As soon as I've received my order within a few weeks, I'll give it a try!

Thanks again!!