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12V door entry latch release from WIFI connected device

hi there,

I'm considering to setup a simple wifi controlled door entry system. Currently i have a door which can be opened with a key, or you can be buzzed in via the intercom.

I'd like to include a switch to release the latch that's activated by pressing a button on a mobile app.

It could get more sophisticated, but that would be a start to cover the hardware side.

I'd need to install a wifi-connected unit that can trigger a 12V switch.

Any suggestions / ideas how to start?

Maybe something from here: http://netio.davideickhoff.de/en/

Thanks
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xenium
Asked:
xenium
5 Solutions
 
Martin MillerCTOCommented:
You are already heading in the right direction for a solution :-)

Looks like a fun project, let us know the final resultant.

You need to consider the conversion of digital I/O to an OPEN/CLOSE relay-switch. The Relay will allow an actuation of the switch to unlatch the door.  I have seen industrial versions, but, these are expensive, e.g. check Granger Catalog.

Martin
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xeniumAuthor Commented:
hi guys, thanks for the tips and encouragement :-)

Did some more googling and seems there's a lot out there. Still it's murky waters for me.

I'm wandering for the switch if something as simple at this would do it...

https://www.amazon.co.uk/Sonoff-Wireless-Switch-Receiver-Control/dp/B074SGJK57

This one seems to be for switching AC devices, but something similar maybe.
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xeniumAuthor Commented:
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Martin MillerCTOCommented:
These are all interesting options to experiment with. May I suggest you share the final project on experts-exchange as an article, include a simple diagram, and links to all of the options you tested with pro-con from your project.
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Shaun VermaakTechnical Specialist/DeveloperCommented:
I use ESP8266 chips with relay shields. Very cheap and already has WiFi. I also work perfectly with http://blynk.io
s-l225-1-.jpg
Another option is an Arduino WiFi with relay shields but this is more expensive, as used here with sensors.
https://www.experts-exchange.com/articles/29567/How-to-connect-Arduino-Uno-WiFi-to-ThingSpeak.html
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EirmanChief Operations ManagerCommented:
Don't forget about the security of the lock - That is of paramount importance.
Consider an electromagnetic locking mechanism with a good battery backup.
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xeniumAuthor Commented:
Thanks again for the tips & suggestions. It's looking maybe a little out of my skill area, but I'll try to work on something over the next couple weeks.
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xeniumAuthor Commented:
Ok happy to close this as it maybe a while till i get round to this, though i still intend to update here once i have something working. I may use an Arduino setup of some sort:

Note sure yet if this will help: https://electronics.stackexchange.com/questions/64798/can-an-arduino-use-a-12-v-relay
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Martin MillerCTOCommented:
Several good suggestions made, can we close this ?
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