Doorlock
| Doorlock Release status: stable [box doku] | |
|---|---|
| |
| Description | Electronic door lock for the new space |
| Author(s) | tarwin, tiefpunkt |
| Download | https://github.com/munichmakerlab/doorlock |
Our space has a super smart electronic lock, which we mostly designed ourselves. Woopwoop!
Theory
We needed a lock that allows us to hand out as many "keys" as we like, but without making it super complicated to use. A lot of hackerspaces used SSH keys as "keys" to their space. For us, that's not user friendly enough, as we expect quite a few non-technical folks to have access to the space
After discussions, we settled for a two-factor system, using RFID cards and PINs. Additional means to authenticate may be introduced at another point in time.
Doorlock Improvement Initiative 2025
TODO:
- Check out the actual plan
- What resources have been bought already?
- What software version is on github?
- What is the status of the backup? https://wiki.munichmakerlab.de/wiki/Backup
Frontend
TODO:
- Improve cabeling
- Improve touch mechanism
Notes 2025: There started already a intiative 2023 to create a custom PCB, but these initative seemed to have died.
Latest commit:
https://github.com/munichmakerlab/doorlock/pull/6
Status of the PCB: https://munichmakerlab.slack.com/archives/C78KSC5EG/p1699443705049589
Last information: 20231029 Plenum
|
Backend
TODO:
- get back to lock mechanism directly in the door of the left rolling gate
- keep the mechanism with the rolling gate as backup
Notes 2025: There should be already the new door lock be available, but it's not clear what is the current status.
Software to program the mechanical lock: TMS Soft (by dormakaba)
Latest status:
- Adapter cable arrived and will be installed later today
- When the entrace is moved from the workshop gate to the normal door, hopefully within the next few weeks, you will be informed
- Door Lock: The Door opener has bin acting up again every day the last three days. The error pattern is that it says "Its Open" but the garage door does not open. You can try messaging me (Aaron) in slack if you are locked out, I am often not far away. We could try fixing this, or get the actual door lock in the entrance working instead (the latter being our original plan). Over the next days I will ask around stakeholders™ and see if I can collect and improve existing documentation so it becomes clearer what we could do. There is quite a good documentation already: Wiki article Doorlock. The github repos with the code are also linked there.
Version 3 (future)
work in progress
20.11.2025: A two-wire cable from the doorlock control box to the roll-up gate control box in the workshop was installed.
Version 2 (current)
Frontend
RFID reader, pinpad, and LCD display, connected to an Arduino.
Backend
The backend is not connected to the door anymore, because the old door lock mechanism broke. Instead the left rolling gate is controlled via the frontend/backend. This solution works ok, but has some issues especially with the connection from backend to the door controller over wifi.
Schema
Version 1 (old space)
Hardware
Frontend
RFID reader, pinpad, and LCD display, connected to an Arduino.
Prototype used an Arduino Uno, which is a little short on pins. A buzzer would be nice, and we currently can't control the backlight of the LCD.
Current version is still based on an Arduino Nano, a LCD display, and the RFID reader, all in a nice 3D printed case.
Locking Mechanism
We got a motor lock on eBay, together with its electronics, and we'll use that. It's a Dorma SVP 2000 series lock.
The electronics have a set of contacts that can be used to get the status of the lock, as well as to lock and unlock it. We currently just use the pins to (un)lock it.
Backend
A Raspberry Pi, which is connected to the frontend over a serial connection (via a USB thingie), and has the motor lock electronics connected via its GPIOs and a relay. No status checks are being done yet.
Schema
+-----------+
| RFID |
+-(SPI)--+ Reader |
| +-----------+
+--------------+ +---------------+ |
| | | | | +-----------+
| RaspberryPi +----(UART)----+ Arduino +--+----------+ Keypad |
| | | (frontend) | | +-----------+
+------+-------+ +---------------+ |
| | +-----------+
(Relay board) +-(I²C)-+ Display |
| +-----------+
+-----+------+
| Door lock |
+------------+
Software
Hosted on Github: https://github.com/munichmakerlab/doorlock, contains both the frontend firmware as well as the software for the backend.
The backend runs on the RPi, and uses a SQLite database to store RFID and PIN information. The "manage_db.py" script can be used to maintain that database.
Pictures
On our tumblr:
- http://log.munichmakerlab.de/post/108441721925/taking-apart-our-motorized-door-lock-we-got-a
- http://log.munichmakerlab.de/post/110074434770/we-build-our-own-door-lock-system-but-the
- http://log.munichmakerlab.de/post/117603378425/a-control-panel-for-our-door-lock-up-until-now
HW
- RFID: Mifare 13.56Mhz RC522 RFID Card Reader Module
- Dorma SVP 2272 (probably, might also be 2271)
- Entfernung: 72mm
- Dornmaß: 65mm
ToDo
- Make the backend more maintainable
- Allow for better integration with other applications, such as potentially the laser cutter and a cashless payment system.
Resources
- Dorma lock & electronics documentation
- Talk about doorlock at muCCC
- Video of first prototype
- Details on circuit inside the lock and the control stuff
FAQ
- How do I unlock the door? Hold your RFID card on the right side of the box, wait for the prompt, enter the PIN and press the green button.
- How do I lock the door from outside? press 0 and the unlabeled button next to it on the right, wait for the confirmation message. Check that the door is properly locked!
