def on_message(client, userdata, msg):
# Process messages received from MQTT Broker
# Place the messages received in the 'outboundMQTTqueue queue'
# Format of message = DCB Function/Thermostat ID/DCB Value
# Assumes that the DCB Function, Thermostat ID and Value are all correct
if msg.topic.startswith(hmMQTTpath):
queuemsg = msg.topic[len(hmMQTTpath) + 1:len(msg.topic)] + "/" + str(
msg.payload)
outboundMQTTqueue.put(queuemsg)
logmessage('info', 'mqtt.py',
'Message received from MQTT Broker ' + queuemsg)
def connectMQTT():
global mqttclient
while True:
mqttclient = mqtt.Client()
mqttclient.on_connect = on_connect
mqttclient.on_disconnect = on_disconnect
try:
mqttclient.connect(MQTTBrokerIP, MQTTBrokerPort)
mqttclient.loop_start()
break
except:
logmessage('error', 'monitor.py', 'Error connecting to the MQTT Broker')
time.sleep(30)
def sendtoSerial(sendMSG):
# Send data to the serial interface for the thermostats
receiveTimeout = 0.5
datal = []
recvMSG = ''
try:
s.send(sendMSG)
except socket.error, msg:
logmessage('error', 'heatmiser.py',
'Error connecting with the serial interface: ' + str(msg))
s.close()
connectSerial()
time.sleep(10)
return datal
def on_connect(client, userdata, rc):
# Do something when connected to MQTT Broker
logmessage('info', 'mqtt.py', 'Connected to broker')
# Go through all the entries in the hmDCBStructure array
for loop in hmDCBStructure:
# Find only those which have a status of 'RW'
# Then subscribe to each element
if hmDCBStructure[loop][5] == 'RW':
hmMQTTSubscribePath = hmMQTTpath + "/" + hmDCBStructure[loop][
1] + "/#"
mqttclient.subscribe(hmMQTTSubscribePath)
logmessage(
'info', 'mqtt.py',
'Subscribed to MQTT Broker using path ' + hmMQTTSubscribePath)
def connectSerial():
# Start a few things off before we get going
# Connect to the Serial interface for the Heatmiser Thermostats
global s
while True:
try:
s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
s.connect((hmSerialIP, hmSerialPort))
s.settimeout(hmSerialTimeout)
s.setblocking(0)
time.sleep(0.5)
logmessage('info', 'heatmiser.py',
'Connected to the serial interface')
break
except socket.error, msg:
logmessage(
'error', 'heatmiser.py',
'Error connecting with the serial interface: ' + str(msg))
time.sleep(60)
def hmTimeUpdate():
# Update thermostat times
dayofweek = datetime.datetime.now().isoweekday()
hour = datetime.datetime.now().time().hour
mins = datetime.datetime.now().time().minute
secs = datetime.datetime.now().time().second
payload = [dayofweek, hour, mins, secs]
for sendIndex in hmStatList:
sendMSG = bytearray(hmFormMsgCRC(sendIndex, FUNC_WRITE, 43, payload))
datal = sendtoSerial(sendMSG)
if hmValidateResponse(datal) == 1:
if datal[3] == sendIndex:
if datal[4] == FUNC_WRITE:
# Need to call the refresh of the DCB data to send to the MQTT broker
logmessage(
'info', 'heatmiser.py',
'Time updated for Thermostat ID: ' + str(sendIndex))
else:
logmessage(
'error', 'heatmiser.py',
'Failed to update time for Thermostat ID: ' +
str(sendIndex))
else:
logmessage('error', 'heatmiser.py',
'Incorrect ThermostatID response received')
def hmRecvMQTTmessage():
# Check the MQTT Receive queue to see if there are any messages to process
# Receive queue is filled by mqtt.py
# Receive Frame format [129, 7, 0, 4, 1, 69, 20]
if outboundMQTTqueue.qsize() != 0:
recvMSG = outboundMQTTqueue.get()
# Loop through all the DCB settings
for loop in hmDCBStructure:
if hmDCBStructure[loop][5] == 'RW':
# Is the message received from the broker equal to the message functions in the defined array
if recvMSG.startswith(hmDCBStructure[loop][1]):
destination = int(
recvMSG[len(hmDCBStructure[loop][1]) + 1:recvMSG.
find('/',
len(hmDCBStructure[loop][1]) + 1)])
# Check to make sure the Thermostat ID is in the expect range in hmStatList
if destination in hmStatList:
dcbcommand = int(hmDCBStructure[loop][0])
# Check to make sure the value being sent is within allowable range
dcbvalue = int(
str(recvMSG[recvMSG.
find('/',
len(hmDCBStructure[loop][1]) +
1) +
1:len(recvMSG)]).split('.')[0])
if hmDCBStructure[loop][
6] <= dcbvalue <= hmDCBStructure[loop][7]:
# Work out the holiday time
if hmDCBStructure[loop][1] == 'HolidayTime':
hours = dcbvalue * 24
hours_lo = (hours & BYTEMASK)
hours_hi = (hours >> 8) & BYTEMASK
payload = [hours_lo, hours_hi]
else:
payload = [dcbvalue]
# Send updates to the Thermostat
sendMSG = bytearray(
hmFormMsgCRC(destination, FUNC_WRITE,
dcbcommand, payload))
datal = sendtoSerial(sendMSG)
# Validate the response from the thermostat
if hmValidateResponse(datal) == 1:
# Does the receiving data source address match the destination send address
if datal[3] == destination:
# Does the response have a WRITE response in the frame
if datal[4] == FUNC_WRITE:
# Call the refresh of the DCB data for that thermostat
sendMSG = bytearray(
hmFormMsgCRC(
destination, FUNC_READ, 00, 0))
datal = sendtoSerial(sendMSG)
# Validate the response from the Thermostats to ensure that an appropriate message has been received for processing
if hmValidateResponse(datal) == 1:
# Check to work out what has been sent and forward to the MQTT broker
hmForwardDCBValues(datal, 0)
logmessage(
'info', 'heatmiser.py',
'Command sent to Thermostat ' +
str(destination) + ': ' +
str(hmDCBStructure[loop][1]) +
":" + str(dcbvalue))
else:
logmessage(
'error', 'heatmiser.py',
'Failed to send command to Thermostat: '
+ str(destination))
else:
logmessage(
'error', 'heatmiser.py',
'Incorrect ThermostatID response received'
)
def on_disconnect(client, userdata, rc):
logmessage('info', 'heatmiser.py', 'Disconnected from MQTT broker')
def on_connect(client, userdata, rc):
logmessage('info', 'heatmiser.py', 'Connected to MQTT broker')
def on_disconnect(client, userdata, rc):
# Do something when connected to MQTT Broker
logmessage('warning', 'mqtt.py', 'Disconnected from MQTT Broker')
# Place the messages received in the 'outboundMQTTqueue queue'
# Format of message = DCB Function/Thermostat ID/DCB Value
# Assumes that the DCB Function, Thermostat ID and Value are all correct
if msg.topic.startswith(hmMQTTpath):
queuemsg = msg.topic[len(hmMQTTpath) + 1:len(msg.topic)] + "/" + str(
msg.payload)
outboundMQTTqueue.put(queuemsg)
logmessage('info', 'mqtt.py',
'Message received from MQTT Broker ' + queuemsg)
# Start the MQTT Client
mqttclient = mqtt.Client()
mqttclient.on_connect = on_connect
mqttclient.on_message = on_message
mqttclient.on_disconnect = on_disconnect
while True:
mqttclient = mqtt.Client()
mqttclient.on_connect = on_connect
mqttclient.on_message = on_message
mqttclient.on_disconnect = on_disconnect
try:
mqttclient.connect(MQTTBrokerIP, MQTTBrokerPort)
break
except:
logmessage('error', 'mqtt.py', 'Error connecting to MQTT Broker')
time.sleep(30)
# Perform an infinate loop to receive messages from the MQTT Broker
mqttclient.loop_start()
def on_disconnect(client, userdata, rc):
logmessage('info', 'monitor.py', 'Disconnected from MQTT Broker')
def on_connect(client, userdata, rc):
logmessage('info', 'monitor.py', 'Connected to MQTT Broker')
def syncrepodata():
logmessage('getting called ')
return 'Hello World'
