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--- rfid_access_system_door_lock_and_laser_cutter [2020/10/29 12:43]
Tiago
+++ rfid_access_system_door_lock_and_laser_cutter [2020/11/12 13:58] (current)
Tiago [RPi preparation]
@@ Line 1: / Line 1: @@
 ====== DIY RFID system with RPi ======
 If you're interested to know how this stared, [[rfid_access_system_door_lock_and_laser_cutter_inspiration|have a look here]]. This project was supposed to be a generic solution for giving EB members controlled access to lab resources. So far it's working for the laser cutter only, but has some potential to be extended!
 We tried hard to used a micro-controller for this. This one worked with an Arduino Nano without the Ethernet Shield. Once we connect the Ethernet shield it won't work via SPI. And via i2c it becomes very unstable. So we tried with a Raspberry Pi models 1 and 2. Didn't work either. Tried SPI, i2c and UART. Also, after many issues dealing with RFID reader MFRC522, we decided to move to PN532. So finally we got the PN532 working with a Raspberry Pi 3 via i2c. So far it's been consistent.
+The source code is available on github: https://github.com/tiagovaz/eblab/
 ===== Hardware parts =====
@@ Line 13: / Line 14: @@
   * [[https://abra-electronics.com/sensors/sensors-id-en/high-frequency/sens-26-mfrc522-nfc-rfid-controller-breakout-board.html |MFRC522 NFC/RFID Controller Breakout Board]]
   * [[https://abra-electronics.com/robotics-embedded-electronics/raspberry-pi-en-3/displays/wave-15811-3.5inch-rpi-lcd-c-480x320-125mhz-high-speed-spi.html|3.5inch RPi LCD (C), 480x320, 125MHz High-Speed SPI]]
+  * [[http://www.datasheetcafe.com/srd-05vdc-sl-c-datasheet-pdf/|5V Relay SRD-05VDC-SL-C or similar]]
 The current solution includes a few Python scripts on a local Raspberry Pi and a simple Django application server side.
@@ Line 19: / Line 21: @@
 **Hardware**
+{{ :signal-2020-11-12-135551_002.jpeg?nolink&400 |}}
+**WIP:**
+{{ ::eblab_rfid_bb.png?nolink&400 |}}
 **Software**
@@ Line 40: / Line 48: @@
 The django app provided along with the local scripts should be deployed as a regular django app, nothing special :-) The dependencies are listed in the ''requirements_server.txt'' and can be installed via pip3. This should be deployed under HTTPS using any webserver. The URL should be set on the local scripts accordingly.
+For authenticating the RPi requests, you need to create a user token and add it to script ''eblaser_gui.py''. On the server side, do the following:
+''python3 manage.py drf_create_token eb''
+On the client side, add the generated token to ''self.headers'' CardReader attribute:
+''self.headers = {'Authorization': 'Token MYSECRETTOKENGENERATEDONTHESERVER'}''
+**API**
+For json responses, add ''format=json'' to the URL.
+Resource usage examples:
+  * /rfid/?uid=XXXXXX&resource=laser_cutter&action=LAS (starting laser usage)
+  * /rfid/?uid=XXXXXX&resource=laser_cutter&action=LAE&usage_time=120 (ending laser usage and recording cut time)
+Possible actions:
+  * LAS (laser start)
+  * LAE (laser end)
+  * LOI (logged in)
+  * LOO (logged out)
+  * NON (do nothing, used for authentication only)
+Getting users information, mostly used for the RPi screen messages:
+  * /person/XXXXXX (get person name from a given rfid)
+  * /people (get all users info)
+Getting total resource usage from a given user from their rfid:
+  * /daily_usage/XXXXXX

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