def on_transition(mosq, userdata, msg):
if msg.retain == 1:
return
print msg.payload
base_topic, suffix = twosplit(msg.topic)
try:
data = json.loads(str(msg.payload))
except:
return
if '_type' not in data or data['_type'] != 'transition':
print "-- not a transition payload"
return
if 't' not in data or data['t'] != 'b':
print "-- not a 't:b' payload"
return
tst = data.get("tst", 0)
tid = data.get("tid", "--")
if data['event'] == 'enter' and 'desc' in data:
# clear region entry when leaving region
regionTopic = "%s/%s" % (mqttConf.get('regionprefix'), base_topic)
payload = {'tid': tid, 'tst': tst, 'region': data['desc']}
regionPayload = json.dumps(payload)
mqttc.publish(regionTopic, regionPayload, qos=2, retain=False)
elif data['event'] == 'leave':
# clear closestBeacon entry when leaving region
if base_topic in closestBeacons:
del closestBeacons[base_topic];
# clear featured content when leaving region
featured_topic = "%s/%s" % (base_topic, 'cmd')
payload = {'_type': 'cmd', 'tst': tst, 'action': 'action'}
featured_payload = json.dumps(payload)
mqttc.publish(featured_topic, featured_payload, qos=2, retain=False)
# clear beacon entry when leaving region
beaconTopic = "%s/%s" % (mqttConf.get('beaconprefix'), base_topic)
mqttc.publish(beaconTopic, None, qos=2, retain=False)
# clear region entry when leaving region
regionTopic = "%s/%s" % (mqttConf.get('regionprefix'), base_topic)
mqttc.publish(regionTopic, None, qos=2, retain=False)
# clear position entry when leaving region
if base_topic in devices:
del devices[base_topic];
positionTopic = "%s/%s" % (mqttConf.get('positionprefix'), base_topic)
mqttc.publish(positionTopic, None, qos=2, retain=False)
def on_beacon(mosq, userdata, msg):
if msg.retain == 1 or len(msg.payload) == 0:
return
data = None
base_topic, suffix = twosplit(msg.topic)
try:
data = json.loads(str(msg.payload))
except:
return
if '_type' not in data or data['_type'] != 'beacon':
print "-- not a beacon payload"
return
uuid = data.get("uuid", '12345678-ABCD-EF01-2345-000000000001')
major = data.get("major", 0)
minor = data.get("minor", 0)
acc = data.get("acc", 99) * beaconfactor
prox = data.get("prox", 9)
rssi = data.get("rssi", -99)
tst = data.get("tst", 0)
tid = data.get("tid", 0)
print tid, tst, uuid, major, minor, acc, prox, rssi
if base_topic in closestBeacons:
me = closestBeacons[base_topic]
else:
me = {'uuid': '', 'major': 0, 'minor': 0, 'rssi': -99, 'prox': 9, 'acc': 99}
if prox < me['prox'] or (me['uuid'] == uuid and me['major'] == major and me['minor'] == minor):
me['uuid'] = uuid
me['major'] = major
me['minor'] = minor
me['acc'] = acc
me['prox'] = prox
me['rssi'] = rssi
closestBeacons[base_topic] = me
# build featured content message
featured_topic = "%s/%s" % (base_topic, 'cmd')
featured_content = "no matching beacon found\n%s:%d:%d" % (uuid, major, minor)
url = None
(beaconName, beacon) = find_beacon(uuid, major, minor)
if beacon is not None:
featured_content = "%s\n\n%s" % (beacon['desc'], beacon['URL'])
url = beacon['URL']
payload = {'_type': 'cmd', 'tst': tst, 'action': 'action', 'content': featured_content, 'url': url}
featured_payload = json.dumps(payload)
mqttc.publish(featured_topic, featured_payload, qos=2, retain=False)
# build beacon message
beaconTopic = "%s/%s" % (mqttConf.get('beaconprefix'), base_topic)
beaconJson = {'tid': tid, 'tst': tst, 'uuid': uuid, 'major': major, 'minor': minor}
if beacon != None:
beaconJson['name'] = beaconName
beaconJson['room'] = beacon['room']
beaconPayload = json.dumps(beaconJson)
print beaconName, beaconPayload
mqttc.publish(beaconTopic, beaconPayload, qos=2, retain=False)
# get device
if base_topic in devices:
device = devices[base_topic]
else:
device = {'tid': tid, 'visibleBeacons': {} }
# get beacon
beaconString = "%s:%d:%d" % (uuid, major, minor)
visibleBeacons = device['visibleBeacons']
if beaconString in visibleBeacons:
beacon = visibleBeacons[beaconString]
else:
beacon = {'uuid': uuid, 'major': major, 'minor': minor, 'measurements': []}
# measurement keep up to 5 past measurements
measurements = beacon['measurements']
measurement = {'prox': prox, 'rssi': rssi, 'acc': acc, 'tst': tst}
measurements.append(measurement)
if len(measurements) > 5:
del(measurements[0])
# store
beacon['measurements'] = measurements
visibleBeacons[beaconString] = beacon
device['visibleBeacons'] = visibleBeacons
devices[base_topic] = device
if len(visibleBeacons) < 3:
return
# get 3 closest visible beacons
m3 = []
for visibleBeaconString in visibleBeacons:
visibleBeacon = visibleBeacons[visibleBeaconString]
# get average of last measurements
measurements = visibleBeacon['measurements']
n = 0
total = 0
for measurement in measurements:
n = n + 1
total = total + measurement['acc']
mid = total / n
# select 3 closest beacons
i = 0;
while i < len(m3):
if mid < m3[i]['r']:
break
i = i + 1
(beaconName, beacon) = find_beacon(visibleBeacon['uuid'], visibleBeacon['major'], visibleBeacon['minor'])
if beacon is not None:
m = {}
m['x'] = beacon['x'] / mapfactor
m['y'] = beacon['y'] / mapfactor
m['r'] = mid
m3.insert(i, m)
print m3
positionTopic = "%s/%s" % (mqttConf.get('positionprefix'), base_topic)
x = 0;
y = 0;
if len(m3) >= 3:
(x, y) = trilateration(
m3[0]['x'],
m3[0]['y'],
m3[0]['r'],
m3[1]['x'],
m3[1]['y'],
m3[1]['r'],
m3[2]['x'],
m3[2]['y'],
m3[2]['r']
)
if numpy.isnan(x) or numpy.isnan(y):
x = 0;
y = 0;
if x != 0 or y != 0:
positionDict = {'tid': tid, 'tst': tst, 'x': x * mapfactor, 'y': y * mapfactor}
positionPayload = json.dumps(positionDict)
mqttc.publish(positionTopic, positionPayload, qos=2, retain=False)
return
