Make specific to RDM6300 card reader

README.md

@@ -4,13 +4,11 @@ Door controller for scanning Protospace member cards on the front and back doors
 
 ## Setup
 
-Ensure Pi user has read permissions to /dev/ttyACM0 (Pi user needs to be part of the dialout group).
-
 Install dependencies:
 
 ```text
 $ sudo apt update
-$ sudo apt install python3 python3-pip python-virtualenv python3-virtualenv supervisor
+$ sudo apt install python3 python3-pip python3-virtualenv supervisor git
 ```
 
 Clone this repo:
@@ -21,16 +19,27 @@ $ sudo mv airlock/ /opt/
 $ cd /opt/airlock
 ```
 
-### Watchdog
+### Hardware Access
 
-For the watchdog to work, we need write access to `/dev/watchdog/`.
+Ensure Pi user has read permissions to `/dev/ttyACA0` and `/dev/watchdog`.
 
-Configure `/etc/udev/rules.d/60-watchdog.rules`:
+Configure `/etc/udev/rules.d/local.rules`:
 
 ```text
+ACTION=="add", KERNEL=="dialout", MODE="0666"
+ACTION=="add", KERNEL=="ttyACM0", MODE="0666"
+ACTION=="add", KERNEL=="ttyAMA0", MODE="0666"
 KERNEL=="watchdog", MODE="0666"
 ```
 
+Also ensure `/boot/cmdline.txt` doesn't contain `console=serial0,115200`.
+
+Then reboot:
+
+```text
+$ sudo reboot
+```
+
 ### Main Script
 
 Create a venv, activate it, and install:
@@ -53,6 +62,13 @@ Now you can run the script to test:
 (env) $ DEBUG=true python main.py
 ```
 
+Copy and edit the settings file:
+
+```text
+(env) $ cp secrets.py.example secrets.py
+(env) $ vim secrets.py
+```
+
 ## Process management
 
 The script is kept alive with [supervisor](https://pypi.org/project/supervisor/).
@@ -64,6 +80,7 @@ Configure `/etc/supervisor/conf.d/airlock.conf`:
 user=pi
 directory=/opt/airlock
 command=/opt/airlock/env/bin/python -u main.py
+stopasgroup=true
 stopsignal=INT
 autostart=true
 autorestart=true

main.py

@@ -1,12 +1,14 @@
+import os
+
+DEBUG = os.environ.get('DEBUG', False)
 import logging
 logging.basicConfig(
     format='%(asctime)s - %(name)s - %(levelname)s - %(message)s',
-    level=logging.INFO)
+    level=logging.DEBUG if DEBUG else logging.INFO)
 
 from multiprocessing import Process, Queue
 from queue import Empty
 import RPi.GPIO as GPIO
-import os
 import json
 import requests
 import serial
@@ -15,17 +17,12 @@ from signal import *
 
 import secrets
 
-DEBUG = os.environ.get('DEBUG', False)
 
 RELAY_PIN = 17
 RFID_EN_PIN = 27
 CARDS_FILE = 'card_data.json'
 OPEN_DURATION = 4
 
-API_STATS = 'https://api.my.protospace.ca/stats/'
-API_DOOR = 'https://api.my.protospace.ca/door/'
-API_SEEN = lambda x: 'https://api.my.protospace.ca/door/{}/seen/'.format(x)
-
 ser = None
 
 def unlock_door():
@@ -54,7 +51,7 @@ def init():
     GPIO.output(RFID_EN_PIN, GPIO.LOW)
     logging.info('GPIO initialized')
 
-    ser = serial.Serial(port='/dev/ttyAMA0', baudrate=2400, timeout=0.1)
+    ser = serial.Serial(port='/dev/ttyAMA0', baudrate=secrets.BAUD_RATE, timeout=0.05)
     logging.info('Serial initialized')
 
     for sig in (SIGABRT, SIGILL, SIGINT, SIGSEGV, SIGTERM):
@@ -74,16 +71,28 @@ def reader_thread(card_data_queue):
         except Empty:
             pass
 
-        card = ser.readline()
-        if not card: continue
+        ser.reset_input_buffer()
+        card = ser.read(100)
+
+        if not card:
+            continue
+
+        logging.debug('Raw card read: %s', card)
 
-        card = card.decode().strip()
-        if len(card) != 10: continue
+        try:
+            card = card.decode().strip()
+        except UnicodeDecodeError:
+            continue
+
+        card = card[1:11]
+
+        logging.debug('Card read string: %s', card)
 
         # debounce card scans
         now = time.time()
         if card in recent_scans:
             if now - recent_scans[card] < 5.0:
+                logging.debug('Debouncing scan')
                 continue
         recent_scans[card] = now
 
@@ -102,7 +111,7 @@ def reader_thread(card_data_queue):
         unlock_door()
 
         try:
-            res = requests.post(API_SEEN(card), timeout=2)
+            res = requests.post(secrets.API_SEEN(card), timeout=2)
             res.raise_for_status()
         except BaseException as e:
             logging.error('Problem POSTing seen: {} - {}'.format(e.__class__.__name__, str(e)))
@@ -115,13 +124,15 @@ def update_thread(card_data_queue):
         time.sleep(5)
 
         try:
-            res = requests.get(API_STATS, timeout=5)
+            res = requests.get(secrets.API_STATS, timeout=5)
             res.raise_for_status()
             res = res.json()
         except BaseException as e:
             logging.error('Problem GETting stats: {} - {}'.format(e.__class__.__name__, str(e)))
             continue
 
+        logging.debug('Previous last change time: %s, current: %s', last_card_change, res['last_card_change'])
+
         if res['last_card_change'] == last_card_change:
             continue
         last_card_change = res['last_card_change']
@@ -130,7 +141,7 @@ def update_thread(card_data_queue):
 
         try:
             headers = {'Authorization': 'Bearer ' + secrets.DOOR_API_KEY}
-            res = requests.get(API_DOOR, headers=headers, timeout=5)
+            res = requests.get(secrets.API_DOOR, headers=headers, timeout=5)
             res.raise_for_status()
             res = res.json()
         except BaseException as e:

requirements.txt

@@ -3,5 +3,4 @@ chardet==3.0.4
 idna==2.9
 pyserial==3.4
 requests==2.23.0
-RPi.GPIO==0.7.0
 urllib3==1.25.8

secrets.py.example

@@ -1,3 +1,11 @@
 # Door cards API key
 # should be equal to the auth token value set in Spaceport
 DOOR_API_KEY = ''
+
+# Door API routes
+API_STATS = 'https://api.my.protospace.ca/stats/'
+API_DOOR = 'https://api.my.protospace.ca/door/'
+API_SEEN = lambda x: 'https://api.my.protospace.ca/door/{}/seen/'.format(x)
+
+# Card reader settings
+BAUD_RATE = 2400