mqtt

door.py

@@ -1,5 +1,6 @@
 #!/usr/bin/python
 import os, serial, socket, subprocess, select, datetime, sys
+import paho.mqtt.client as mqcl
 import argparse
 
 OPEN_THRESHOLD = 35
@@ -14,16 +15,25 @@ parser.add_argument("--valid_tokens", default="/etc/door_tokens")
 parser.add_argument("--log_file", default="/tmp/nfc.log")
 parser.add_argument("--state_timeout", type=float, default=10)
 parser.add_argument("--repeat_time", type=float, default=5)
+parser.add_argument("--mqtt_host", default="10.10.21.2")
 
 config = parser.parse_args()
 
+mqttc = mqcl.Client()
+
+def timestamp():
+    return datetime.datetime.now().strftime("%Y-%m-%d %H:%M:%S")
+
 # Log data to stdout and the log file
 def log(*args):
-    data = "%s %s" % (datetime.datetime.now().strftime("%Y-%m-%d %H:%M:%S"), " ".join(str(i) for i in args))
+    data = "%s %s" % (timestamp(), " ".join(str(i) for i in args))
     lgf.write(data + "\n")
     lgf.flush()
     print(data)
 
+def mqtt(topic, msg, persistent = True):
+    mqttc.publish("door/" + topic, msg, qos=2, retain=persistent)
+
 # Opens the socket that can control the daemon
 # Commands are TBD
 def open_control_socket():
@@ -122,14 +132,18 @@ def poll_door_state():
     data = serial_port.readline().strip().split()
     if data[0] == b'pos:':
         data = int(data[1])
+        if state_pos != data:
+            mqtt("position/value", data, True)
         state_pos = data
         changed = False
         if data < OPEN_THRESHOLD and state != OPEN:
             state = OPEN
             changed = True
+            mqtt("state/value", "open", True)
         elif data > CLOSED_THRESHOLD and state != CLOSE:
             state = CLOSE
             changed = True
+            mqtt("state/value", "closed", True)
     return state
 
 # Check the door state and send commands through a state machine
@@ -209,6 +223,7 @@ def open_door():
     log("Opening the door")
     action = OPEN
     start_time = None
+    mqtt("state/target", "open", True)
     handle_door_state()
 
 def close_door():
@@ -217,6 +232,7 @@ def close_door():
     log("Closing the door")
     action = CLOSE
     start_time = None
+    mqtt("state/target", "closed", True)
     handle_door_state()
 
 def toggle_door_state():
@@ -245,12 +261,7 @@ def handle_nfc_token(token = None):
         toggle_door_state()
     else:
         log("Invalid token:", token)
-
-open_logfile()
-read_valid_tokens()
-open_nfc_fifo()
-open_serial_port()
-open_control_socket()
+        mqtt("token/last_invalid", "%s;%s" % (timestamp(), token))
 
 class LineBuffer(object):
     def __init__(self, f, handler):
@@ -269,7 +280,6 @@ class LineBuffer(object):
             self.handler(self.f, i)
         return True
 
-
 def handle_cmd(comm, data):
     cmd = data.decode('utf8').split()
     cmd, args = cmd[0], cmd[1:]
@@ -300,6 +310,16 @@ def handle_cmd(comm, data):
             action_names[action],
             (datetime.datetime.now() - start_time).total_seconds()))
 
+open_logfile()
+read_valid_tokens()
+open_nfc_fifo()
+open_serial_port()
+open_control_socket()
+
+mqttc.on_connect = lambda client, userdata, flags, rc: log("Connected to mqtt host with result %s" % (str(rc), ))
+mqttc.connect_async(config.mqtt_host, keepalive = 60)
+mqttc.loop_start()
+
 buffers = {}
 while True:
     readable = select.select([ nfc_fifo, control_socket ] + comm_channels, [], [], 1)[0]