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xbee2mqtt.py
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xbee2mqtt.py
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#! /usr/bin/python
# -*- coding: utf-8 -*-
# vim: tabstop=4 expandtab shiftwidth=4 softtabstop=4
# Xbee to MQTT gateway
# Copyright (C) 2012-2013 by Xose Pérez
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
__app__ = "Xbee to MQTT gateway"
__version__ = "0.4.20130708"
__author__ = "Xose Pérez"
__contact__ = "xose.perez@gmail.com"
__copyright__ = "Copyright (C) 2012-2013 Xose Pérez"
__license__ = 'GPL v3'
import os
import sys
import time
import logging
#from tests.SerialMock import Serial
from serial import Serial
from libs.daemon import Daemon
from libs.processor import Processor
from libs.config import Config
from libs.mosquitto_wrapper import MosquittoWrapper
from libs.xbee_wrapper import XBeeWrapper
class Xbee2MQTT(Daemon):
"""
Xbee2MQTT daemon.
Glues the different components together
"""
debug = True
duplicate_check_window = 5
logger = None
xbee = None
mqtt = None
processor = None
config_file = None
_routes = {}
_actions = {}
_topics = {}
def load(self, routes):
"""
Read configuration and store bidirectional dicts
"""
self._routes = {}
self._actions = {}
for address, ports in routes.iteritems():
for port, topic in ports.iteritems():
self._routes[(address, port)] = topic
self._actions['%s/set' % topic] = (address, port)
def log(self, level, message):
if self.logger:
self.logger.log(level, message)
def cleanup(self):
"""
Clean up connections and unbind ports
"""
self.xbee.disconnect()
self.log(logging.INFO, "Exiting")
self.mqtt.disconnect()
sys.exit()
def mqtt_on_message(self, topic, message):
"""
Message received from a subscribed topic
"""
self.log(logging.DEBUG, "Message received from MQTT broker: %s %s" % (topic, message))
data = self._actions.get(topic, None)
if data:
address, port = data
self.log(logging.INFO, "Setting radio %s port %s to %s" % (address, port, message))
try:
self.xbee.send_message(address, port, message)
except Exception as e:
self.log(logging.ERROR, "Error while sending message (%e)" % e)
def xbee_on_message(self, address, port, value):
"""
Message from the radio coordinator
"""
self.log(logging.DEBUG, "Message received from radio: %s %s %s" % (address, port, value))
topic = self._routes.get(
(address, port),
self.default_topic_pattern.format(address=address, port=port) if self.publish_undefined_topics else False
)
if topic:
now = time.time()
if topic in self._topics.keys() \
and self._topics[topic]['time'] + self.duplicate_check_window > now \
and self._topics[topic]['value'] == value \
:
self.log(logging.DEBUG, "Duplicate removed")
return
self._topics[topic] = {'time': now, 'value': value}
value = self.processor.process(topic, value)
self.log(logging.INFO, "Sending message to MQTT broker: %s %s" % (topic, value))
self.mqtt.publish(topic, value)
def do_reload(self):
self.log(logging.INFO, "Reloading")
config = Config(config_file)
self.load(config.get('general', 'routes', {}))
self.mqtt.subscribe(self._actions.keys())
def run(self):
"""
Entry point, initiates components and loops forever...
"""
self.log(logging.INFO, "Starting " + __app__ + " v" + __version__)
self.mqtt.on_message_cleaned = self.mqtt_on_message
self.mqtt.subscribe_to = self._actions.keys()
self.mqtt.logger = self.logger
self.xbee.on_message = self.xbee_on_message
self.xbee.logger = self.logger
self.mqtt.connect()
if not self.xbee.connect():
self.stop()
while True:
try:
self.mqtt.loop()
except Exception as e:
self.log(logging.ERROR, "Error while looping MQTT (%s)" % e)
if __name__ == "__main__":
def resolve_path(path):
return path if path[0] == '/' else os.path.join(os.path.dirname(os.path.realpath(__file__)), path)
config_file = resolve_path('config/xbee2mqtt.yaml');
config = Config(config_file)
handler = logging.StreamHandler()
formatter = logging.Formatter('%(asctime)s - %(levelname)s - %(message)s')
handler.setFormatter(formatter)
logger = logging.getLogger()
logger.setLevel(config.get('daemon', 'logging_level', logging.INFO))
logger.addHandler(handler)
mqtt = MosquittoWrapper(config.get('mqtt', 'client_id', None))
mqtt.host = config.get('mqtt', 'host', 'localhost')
mqtt.port = config.get('mqtt', 'port', 1883)
mqtt.keepalive = config.get('mqtt', 'keepalive', 60)
mqtt.clean_session = config.get('mqtt', 'clean_session', False)
mqtt.qos = config.get('mqtt', 'qos', 0)
mqtt.retain = config.get('mqtt', 'retain', True)
mqtt.set_will = config.get('mqtt', 'set_will', True)
serial = Serial(
config.get('radio', 'port', '/dev/ttyUSB0'),
config.get('radio', 'baudrate', 9600)
)
xbee = XBeeWrapper()
xbee.serial = serial
xbee.default_port_name = config.get('radio', 'default_port_name', 'serial')
processor = Processor(config.get('processor', 'filters', []))
xbee2mqtt = Xbee2MQTT(resolve_path(config.get('general', 'pidfile', '/tmp/xbee2mqtt.pid')))
xbee2mqtt.stdout = xbee2mqtt.stderr = resolve_path(config.get('general', 'stdout', '/dev/null'))
xbee2mqtt.debug = config.get('general', 'debug', False)
xbee2mqtt.duplicate_check_window = config.get('general', 'duplicate_check_window', 5)
xbee2mqtt.default_topic_pattern = config.get('general', 'default_topic_pattern', '/raw/xbee/{address}/{port}')
xbee2mqtt.publish_undefined_topics = config.get('general', 'publish_undefined_topics', True)
xbee2mqtt.load(config.get('general', 'routes', {}))
xbee2mqtt.logger = logger
xbee2mqtt.mqtt = mqtt
xbee2mqtt.xbee = xbee
xbee2mqtt.processor = processor
xbee2mqtt.config_file = config_file
if len(sys.argv) == 2:
if 'start' == sys.argv[1]:
xbee2mqtt.start()
elif 'stop' == sys.argv[1]:
xbee2mqtt.stop()
elif 'restart' == sys.argv[1]:
xbee2mqtt.restart()
elif 'reload' == sys.argv[1]:
xbee2mqtt.reload()
else:
print "Unknown command"
sys.exit(2)
sys.exit(0)
else:
print "usage: %s start|stop|restart" % sys.argv[0]
sys.exit(2)