Electronics > Projects, Designs, and Technical Stuff
Garage door opener for 2 doors with 8 remotes
Swake:
Hi,
I have to add remote control to 2 garage doors with 8 users. Ideally even 3 doors and expandable number of users.
- It must be possible to delete one of the remotes (for when it gets lost or stolen for example) without having to reprogram all the remotes or having them at hand.
- Something like a rolling code security system or similar. Not nuclear site grade stuff but definitively not a single code or a fixed signal.
- 20m/60feet reach or better.
We found a commercial solution that costs more than the doors themselves altogether, as we are on a budget that is not an option.
I was thinking of making something with an Arduino or ESP32 as a lot of different remotes are available on the well known Chinese sites, but unfortunately I couldn't locate a system that fits the above specs.
Do you have suggestions?
SeanB:
how about this, though I do not know if it is available by you. 3 channels, code hopping and you can delete individual remotes easily, plus plenty of memory to store transmitters.
http://www.centsys.co.za/upload/product_link_files/CS38_1176.D.02_0001_1_SupaNova_Brochure.pdf
voltsandjolts:
Quite some time ago my garage door opener failed and I took the opportunity to learn about keeloq.
I managed to dig up some code snippets from depths of the internet and got it running.
https://www.eevblog.com/forum/microcontrollers/microchip-keeloq-classic-new-firmware-for-garage-door-receiver-new-fobs/
IIRC the micro eeprom stores a unique code for each paired key, so you could delete as appropriate to remove a key.
I think this was done on MPLAB and free XC8.
Might take a bit of mucking around to get it compiling on MPLABX now.
rvalente:
--- Quote from: SeanB on April 02, 2020, 04:44:00 pm ---how about this, though I do not know if it is available by you. 3 channels, code hopping and you can delete individual remotes easily, plus plenty of memory to store transmitters.
http://www.centsys.co.za/upload/product_link_files/CS38_1176.D.02_0001_1_SupaNova_Brochure.pdf
--- End quote ---
A picture of board with a PIC 16C57, C! Uow... and a key of older 80s fiats, that was nostalgic!
Swake:
The cheap fobs on aliexpress seem to be all the same. Some are claiming to be HCS301 'compatible', actually these have a list of master keys stored from different brands and when you clone them from another working fob these lookup the correct master key and activate that one.
The difficulty I have is finding fobs with different identities. Or fobs that I can program with my own algorithm. Someone DIY minded must have been here before me :)
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