def initMQTT():
topic = config.MQTT_TOPIC
bTopic = bytes(topic, 'UTF-8')
c = MQTTClient(config.MQTT_CLIENT_ID,
config.MQTT_SERVER,
user=secrets.MQTT_USER,
password=secrets.MQTT_PASS)
# Print diagnostic messages when retries/reconnects happens
c.DEBUG = False
c.set_callback(sub_cb)
# Connect to server, requesting not to clean session for this
# client. If there was no existing session (False return value
# from connect() method), we perform the initial setup of client
# session - subscribe to needed topics. Afterwards, these
# subscriptions will be stored server-side, and will be persistent,
# (as we use clean_session=False).
#
# There can be a problem when a session for a given client exists,
# but doesn't have subscriptions a particular application expects.
# In this case, a session needs to be cleaned first. See
# example_reset_session.py for an obvious way how to do that.
#
# In an actual application, it's up to its developer how to
# manage these issues. One extreme is to have external "provisioning"
# phase, where initial session setup, and any further management of
# a session, is done by external tools. This allows to save resources
# on a small embedded device. Another extreme is to have an application
# to perform auto-setup (e.g., clean session, then re-create session
# on each restart). This example shows mid-line between these 2
# approaches, where initial setup of session is done by application,
# but if anything goes wrong, there's an external tool to clean session.
if not c.connect(clean_session=True):
c.subscribe(bTopic)
return c
class MQTTlocal:
__slots__ = ('host', 'port', 'topic', 'client')
def __init__(self, name, host, port, pub_topic, sub_topic):
self.sub_topic = sub_topic
self.pub_topic = pub_topic
self.host = host
self.port = port
self.client = MQTTClient(name, host, port)
self.client.set_callback(sub_cb)
self._connect()
self.client.subscribe(topic=self.sub_topic)
def _connect(self):
print("Connecting to %s:%s" % (self.host, self.port))
self.client.connect()
print("Connection successful")
def on_next(self, x):
data = bytes(json.dumps(x), 'utf-8')
self.client.publish(bytes(self.pub_topic, 'utf-8'), data)
def on_completed(self):
print("mqtt_completed, disconnecting")
self.client.disconnect()
def on_error(self, e):
print("mqtt on_error: %s, disconnecting" % e)
self.client.disconnect()
def check_msg(self):
print("Check messages")
self.client.check_msg()
def main():
led = Pin(2, Pin.OUT, value=1)
def sub_cb(topic, msg):
led.off() # actually on
utime.sleep_ms(500)
led.on() # actually off
sta_if = network.WLAN(network.STA_IF)
sta_if.active(True)
sta_if.connect(WLAN_ESSID, WLAN_PASSWORD)
while not sta_if.isconnected():
utime.sleep_ms(1)
print("WLAN Connected")
c = MQTTClient(MQTT_ID,
MQTT_SERVER,
user=MQTT_USERNAME,
password=MQTT_PASSWORD)
c.DEBUG = True
c.set_callback(sub_cb)
c.connect(clean_session=False)
c.subscribe(MQTT_TOPIC)
print("MQTT Connected")
gc.collect()
while True:
c.check_msg()
utime.sleep_ms(10)
c.disconnect()
def initialise(settings=configuration.mqtt.settings):
global client, keepalive, topic_path
client_id = get_unique_id()
keepalive = settings["keepalive"]
topic_path = settings["topic_path"]
if topic_path == "$me": topic_path = get_topic_path(namespace)
client = MQTTClient(client_id,
settings["host"],
settings["port"],
keepalive=keepalive)
client.set_callback(on_message)
client.set_last_will(topic_path + "/state", "nil")
client.connect() # TODO: Catch exception
event.add_timer_handler(mqtt_ping_handler, keepalive * 1000)
if settings["mqtt_insecure_exec"]:
add_message_handler(on_exec_message, "$me/exec")
for topic in settings["topic_subscribe"]:
if topic.startswith("$all/"): topic = "+/+/+" + topic[4:]
if topic.startswith("$me/"): topic = topic_path + topic[3:]
client.subscribe(topic)
print(" ###### MQTT: Connected to %s: %s" %
(settings["host"], topic_path))
class MQTTReader:
__slots__ = ('host', 'port', 'topic', 'client')
def __init__(self, name, host, port, topic):
self.topic = topic
self.host = host
self.port = port
self.client = MQTTClient(name, host, port)
self.client.set_callback(sub_cb)
self._connect()
self.client.subscribe(topic=self.topic)
def _connect(self):
print("Connecting to %s:%s" % (self.host, self.port))
self.client.connect()
print("Connection successful")
def on_completed(self):
print("mqtt_completed, disconnecting")
self.client.disconnect()
def on_error(self, e):
print("mqtt on_error: %s, disconnecting" % e)
self.client.disconnect()
def disconnect(self):
self.client.disconnect()
def wait_msg(self):
self.client.wait_msg()
def main():
machine.freq(160000000)
c = MQTTClient("HSBNE-small-sign", "10.0.1.253", user="", password="")
c.set_callback(sub_cb)
c.set_last_will("devices/small-sign/state", "offline", retain=True)
c.connect()
c.subscribe("devices/small-sign/#")
c.publish("devices/small-sign/state", "online", retain=True)
c.publish("devices/main-sign/ip",
network.WLAN(network.STA_IF).ifconfig()[0],
retain=True)
sign = SignMatrix()
try:
while True:
while c.check_msg():
pass
if enable != 0:
sign.set_delay(delay)
sign.scroller(text)
else:
c.wait_msg()
except KeyboardInterrupt:
c.publish("devices/small-sign/state", "offline", retain=True, qos=1)
c.disconnect()
def mqtt_client(server):
# setup the BUTton and LED
global led
import machine, ubinascii, utime
machine_id = b'ESP8266-%s' % ubinascii.hexlify( machine.unique_id() )
led = machine.Pin(2)
led.init(machine.Pin.OUT)
button = machine.Pin(0)
button.init(machine.Pin.IN, machine.Pin.PULL_UP)
# setup Mosquitto
from umqtt.robust import MQTTClient
mqttc = MQTTClient(machine_id, server)
mqttc.connect()
mqttc.set_last_will(b'test/bradley_edu', b'%s signoff 1' % ( machine_id ) )
mqttc.set_callback(callback_function)
mqttc.subscribe(b'test/#')
# run Mosquitto
butstate = button.value()
while True:
if button.value()!=butstate:
butstate = button.value()
mqttc.publish(b'test/bradley_edu', b'%s B0 %s' % ( machine_id , str(butstate) ) )
mqttc.check_msg() # this will check for messages and call the callback function if needed
utime.sleep_ms(20) # time to allow the callback function to do its job to avoid calling multiple instances
# we actually never quit but this is how shutdown should look like
mqttc.disconnect()
def connect_mqtt():
try:
with open(KEY_FILE, "r") as f:
key = f.read()
print("MQTT received KEY")
with open(CERT_FILE, "r") as f:
cert = f.read()
print("MQTT received CERTIFICATE")
mqtt_client = MQTTClient(client_id=MQTT_CLIENT_ID, server=MQTT_HOST, port=MQTT_PORT, keepalive=5000, ssl=True, ssl_params={"cert":cert, "key":key, "server_side":False})
mqtt_client.connect()
mqtt_client.set_callback(sub_cb)
print("MQTT is connected")
mqtt_client.subscribe(SHADOW_GET_TOPIC)
print("Subscribed to %s topic" % (SHADOW_GET_TOPIC))
while True:
mqtt_client.publish(SHADOW_UPDATE_TOPIC, str(read_sensor_value()))
mqtt_client.wait_msg()
except Exception as e:
print('Cannot connect to MQTT ' + str(e))
raise
def connect_and_subscribe(sub_callback=None):
"""Connectes to MQTT-Host and subscribes to topics. MQTT-IP, -Port and Topics must be defined in
credentials.json.
Args:
sub_callback (func(topic, msg), optional): Callback-Function when message is recieved.
Returns:
MQTT-Client
"""
with open("credentials.json", "r") as f:
credentials = ujson.load(f)
try:
from umqtt.robust import MQTTClient
except ImportError as e:
import upip
upip.install('micropython-umqtt.simple')
upip.install('micropython-umqtt.robust')
from umqtt.robust import MQTTClient
# Set Options for MQTT-Broker
client = MQTTClient(ubinascii.hexlify(machine.unique_id()),
credentials["mqtt"]["host"],
credentials["mqtt"]["port"])
# Set callback to handle Messages
if sub_callback is not None:
client.set_callback(sub_callback)
# Connect
client.connect(clean_session=False)
for topic in credentials["mqtt"]["topics"]:
client.subscribe(topic)
time.sleep(3)
client.check_msg()
return client
class AsyncMqttMessages(object):
def __init__(self):
config = Config()
self.heatmessage = {'Heating': ''}
self.tempMessage = {'TempIN': '', 'TempOUT': ''}
self.mqttID = config.mqttID
self.mqttBroker = config.mqttBroker
self.user = config.mqttUser
self.password = config.mqttPassword
self.client = MQTTClient(self.mqttID, self.mqttBroker, 1883, self.user,
self.password)
self.client.connect()
self.client.set_callback(sub_cb)
self.client.subscribe(topic="home/attackHeater/stat")
def publishHeat(self, message):
self.heatmessage['Heating'] = message
m = ujson.dumps(self.heatmessage)
self.client.publish(topic="home/attacHeater/heating", msg=m)
def publishTemp(self, temp_in, temp_out):
self.tempMessage['TempIN'] = temp_in
self.tempMessage['TempOUT'] = temp_out
m = ujson.dumps(self.tempMessage)
self.client.publish(topic="home/attacHeater/heating", msg=m)
def mqtt_server():
global client
global client_int
if client == None:
client = MQTTClient(client_id='1ebe9d4c-9e49-4bf4-8abb-f322009c377c',
server='m16.cloudmqtt.com',
port=17330,
user='******',
password='******')
#client = MQTTClient(client_id='1ebe9d4c-9e49-4bf4-8abb-f322009c377c', server='m16.cloudmqtt.com', port=17661, user='******', password='******')
client.set_callback(sub_cb)
client.connect()
print("Connected to MQTT Client")
# the first argument is the topic, the second is the message
client.subscribe("Sensor_Data")
client_int = Timer(3)
client_int.init(period=1000,
mode=Timer.PERIODIC,
callback=client_interrupt)
#client.publish("SessionID", b"four"*8, True, 0)
client.publish("SessionID", AES.sessionID, True, 0)
client_interrupt(None)
class Connect:
def __init__(self):
self.sta = network.WLAN(network.STA_IF)
self.ConnectWiFi()
self.c = MQTTClient("umqtt_client", "192.168.110.51")
self.ConnectMQTT()
def ConnectMQTT(self):
print("connecting to mqtt ROBUST")
self.c.set_callback(self.deb)
self.c.connect()
self.c.subscribe("test/msg")
def Emit(self):
emi = MQTTClient('emiter', "192.168.110.51")
emi.connect()
emi.publish("test/msg", "from nodeMCU !")
emi.disconnect()
def deb(self, topic, msg):
print((topic, msg))
def ConnectWiFi(self):
self.sta.active(True)
self.sta.connect('g.tec', '#g.tec#17!')
print("connecting to WiFi at gtec")
while self.sta.isconnected() == False:
pass
print("Connection successful")
print(self.sta.ifconfig())
def device_connect():
global MQTT_CLIENT
try: #all this below runs once ,equivalent to Arduino's "setup" function)
with open(KEY_FILE, "r") as f:
key = f.read()
print("set private Key")
with open(CERT_FILE, "r") as f:
cert = f.read()
print("set client Cert")
MQTT_CLIENT = MQTTClient(client_id=MQTT_CLIENT_ID,
server=MQTT_HOST,
port=MQTT_PORT,
keepalive=5000,
ssl=True,
ssl_params={
"cert": cert,
"key": key,
"server_side": False
})
MQTT_CLIENT.connect()
print('MQTT Connected')
MQTT_CLIENT.set_callback(sub_cb)
MQTT_CLIENT.subscribe(SUB_TOPIC)
print('Subscribed to %s as the incoming topic' % (SUB_TOPIC))
return MQTT_CLIENT
except Exception as e:
print('Cannot connect MQTT: ' + str(e))
raise
def connect_and_subscribe():
global client_id, mqtt_server, topic_sub
client = MQTTClient(client_id, mqtt_server)
client.set_callback(sub_cb)
client.connect()
client.subscribe(topic_sub)
print('Connected to: %s \nSubscribed to: %s' % (mqtt_server, topic_sub))
return client
def init_mqtt():
log("MQTT Connecting")
cli = MQTTClient(config.mqtt_name, config.mqtt_server)
cli.DEBUG = True
cli.set_callback(sub_cb)
cli.connect()
cli.subscribe(config.mqtt_subscribe)
log("MQTT Connected")
return cli
def connect_and_subscribe():
global client
print('Connecting to {}:{} as user {} with password {}'.format(config.broker, config.port, config.user, config.password))
client = MQTTClient(client_id, config.broker, port=config.port, user=config.user, password=config.password)
client.set_callback(callback)
if not client.connect(clean_session=False):
print("Created new session to {}".format(config.broker))
topic = b"/" + machine_id + b"/cmd/+"
client.subscribe(topic)
print("Subscribed to {}".format(topic))
class MessageBus:
def __init__(self, on_message_handler):
self._on_message_handler = on_message_handler
self._device_id = config["device_id"]
self._client = MQTTClient(client_id=self._device_id,
server=config["broker"],
ssl=False)
self._client.set_message_received_handler(self._on_message)
self._client.set_connected_handler(self._on_connected)
def connect(self):
connected = False
while not connected:
try:
self._client.connect()
connected = True
except Exception as exc:
logger.log("E9 %r" % exc)
time.sleep(0.5)
# The callback for when MQTT client has connected
def _on_connected(self):
self._client.subscribe("to/{}/#".format(self._device_id))
def publish(self, component_id, payload):
payload = str(payload)
self._client.publish(
"from/{}/{}".format(self._device_id, component_id), payload)
def service(self):
self._client.check_msg()
# The callback for when a PUBLISH message is received from the server.
def _on_message(self, topic, payload):
try:
topic = str(topic, "ascii")
payload = self._coerce_payload(str(payload, "ascii"))
parts = topic.split("/")
component_id = parts[2]
is_set = True if len(parts) == 4 and parts[3] == "set" else False
payload = payload if is_set else None
self._on_message_handler(component_id, payload)
except Exception as exc:
logger.log("E8 %s" % exc)
@staticmethod
def _coerce_payload(payload: str):
bool_test = payload.lower()
if bool_test == "true":
payload = True
elif bool_test == "false":
payload = False
return payload
def connectMQTT():
try:
client = MQTTClient(mqttClientId, mqttHost, mqttPort, mqttUsername,
mqttPassword)
client.set_callback(alarm)
client.connect()
client.subscribe('alarm')
return client
except:
return False
def mqttCollectMessages(
inMqttBroker=CONFIG["mqttBroker"],
inMqttClientUniqueId=CONFIG["mqttClientUniqueId"],
inMqttTopic=CONFIG["mqttConfigTopic"],
):
global MQTTRECEIVED
MQTTRECEIVED = []
outMqttData = []
countMsg = 0
mqttClient = MQTTClient(
inMqttClientUniqueId,
inMqttBroker,
ssl=CONFIG["mqttSSL"],
user=CONFIG["mqttUser"],
password=CONFIG["mqttPassword"],
)
mqttLastWill = ("-1, -1, -1, -1, -1, -1, -1, -1, -1, " +
inMqttClientUniqueId + ", " +
MESSAGE_TYPES["mqttErrorMessage"] + ", " +
"UngracefulDisconnect, " +
"Ungraceful disruption of MQTT collect, ")
mqttClient.set_last_will(inMqttTopic, mqttLastWill)
mqttClient.set_callback(mqttCallback)
print("Trying to collect the MQTT Messages.", inMqttTopic)
print("MQTTSTATS", MQTTSTATS)
try:
mqttClient.connect()
print("Subscribe to", inMqttTopic)
mqttClient.subscribe(topic=inMqttTopic)
while CONFIG["mqttReceivedMax"] > countMsg:
print("Checking for MQTT message")
mqttClient.check_msg()
countMsg += 1
time.sleep_ms(200)
MQTTSTATS["receivedMsgs"] += len(MQTTRECEIVED)
print("MQTTRECEIVED", MQTTRECEIVED)
mqttProcess()
print("Message(s) of MQTT were processed.")
print("MQTTSTATS", MQTTSTATS)
time.sleep(1)
mqttClient.disconnect()
except Exception as e:
print("MQTT collections failed.")
sys.print_exception(e)
errorMessage = mqttErrorMessage(
inMqttClientUniqueId,
"Exception",
"MQTTClientConnectError",
str(e),
)
outMqttData.append(errorMessage)
return outMqttData
class MQTTData:
def __init__(self, server, user, password, sname):
self.topic = bytes('{}/feeds/{}-{{:s}}'.format(user, sname.lower()),
'utf-8').format
client_id = hexlify(unique_id()).upper()
self.client = MQTTClient(client_id,
server,
user=user,
password=password)
self.client.set_callback(self.buttons_cb)
self.client.connect()
# Subscribe to topics
LOG.debug("Subscribe: %s", self.topic('force'))
self.client.subscribe(self.topic('force'))
def buttons_cb(self, topic, value):
LOG.info('Button pressed: %s %s', topic.decode(), value.decode())
if topic == self.topic('force') and value.upper() == b'TRUE':
FAN().status(FAN.ON)
elif topic == self.topic('force') and value.upper() == b'FALSE':
FAN().status(FAN.AUTOMATIC)
async def run(self):
sensor = EnvSensor()
if SAMPLING > 20:
nb_samples = 7
sampling = 1000 * (SAMPLING / nb_samples)
else:
nb_samples = 1
sampling = SAMPLING
sampling = int(sampling)
while True:
try:
for key in ['temperature', 'pressure', 'humidity']:
value = "{:.2f}".format(getattr(sensor, key))
self.client.publish(self.topic(key), bytes(value, 'utf-8'))
LOG.info('Publishing: %s: %s', key, value)
await asyncio.sleep_ms(10)
self.client.check_msg()
except OSError as exc:
LOG.error('MQTT %s %s', type(exc).__name__, exc)
await asyncio.sleep_ms(750)
finally:
for _ in range(nb_samples):
self.client.check_msg()
await asyncio.sleep_ms(sampling)
gc.collect()
def connect():
global value
global pvalue
value = {}
pvalue = {}
client = MQTTClient('ev3', SERVER)
client.connect()
client.set_callback(on_message)
client.subscribe(ev3)
send_state()
check_message_thread = Thread(target=check_message, args=(client, ))
check_message_thread.start()
def Conexion_MQTT():
#client_id = b"Covid_1" + ubinascii.hexlify(machine.unique_id())
client_id = CONFIG["client_id"]
mqtt_server = CONFIG["broker"]
port_mqtt = 1883
user_mqtt = None #Si su servidor no necesita usuario escribe None sin comillas
pswd_mqtt = None #Si su servidor no necesita contraseña escribe None sin comillas
client = MQTTClient(client_id, mqtt_server,port_mqtt,user_mqtt,pswd_mqtt)
client.DEBUG = True
client.set_callback(form_sub)
client.connect(True)
client.subscribe(CONFIG["subscribe"])
print('Conectado a %s' % mqtt_server)
return client
def connect_and_subscribe(client_id, broker_ip, broker_port, sub_callback=None,
sub_topics=[]):
# Set Options for MQTT-Broker
client = MQTTClient(client_id, broker_ip, broker_port)
# Set callback to handel Messages
if sub_callback is not None:
client.set_callback(sub_callback)
# Connect
client.connect(clean_session=False)
for topic in sub_topics:
client.subscribe(topic)
time.sleep(3)
client.check_msg()
return client
def _create_client(self):
try:
client = MQTTClient('terrarium',
config.MQTT_HOST,
user=config.MQTT_USER,
password=config.MQTT_PASSWORD,
port=config.MQTT_PORT)
client.set_callback(self.on_message)
if not client.connect(clean_session=False):
print("MQTT new session being set up.")
client.subscribe('cmnd/terrarium/#', qos=1)
return client
except Exception as e:
print(e)
return None
def start_mqtt(self, server="ops-senpai.5z.fyi"):
c = MQTTClient("dog",
"ops-senpai.5z.fyi",
port=30001,
user="******",
password="******")
c.set_callback(self._sub_cb)
c.connect()
c.subscribe(b"printme")
try:
while True:
# Blocking wait for message
c.wait_msg()
finally:
c.disconnect()
def mqtt_reconnect():
# Create an instance of MQTTClient
global client
client = MQTTClient(CONFIG['CLIENT_ID'],
CONFIG['MQTT_BROKER'],
user=CONFIG['USER'],
password=CONFIG['PASSWORD'],
port=CONFIG['PORT'])
# Attach call back handler to be called on receiving messages
client.DEBUG = True
client.set_callback(onMessage)
client.connect(clean_session=True)
client.subscribe(CONFIG['TOPIC'])
print("ESP8266 is Connected to %s and subscribed to %s topic" %
(CONFIG['MQTT_BROKER'], CONFIG['TOPIC']))
def main():
mqtt = MQTTClient(CLIENT_ID,
mqtt_broker,
user=mqtt_user,
password=mqtt_pass)
mqtt.set_callback(sub_cb)
print('connecting MQTT')
mqtt.connect()
mqtt.subscribe('fmi/kumpula/t2m')
mqtt.check_msg()
time.sleep(1)
#mqtt.check_msg()
while True:
mqtt.check_msg()
time.sleep(300)
mqtt.disconnect()
def initialise(settings):
global client, keepalive
client_id = get_unique_id()
keepalive = settings["keepalive"]
topic_path = settings["topic_path"]
client = MQTTClient(client_id,
settings["host"], settings["port"], keepalive=keepalive)
client.set_callback(on_message)
client.set_last_will(topic_path + "/state", "nil")
client.connect()
for topic in settings["topic_subscribe"]: client.subscribe(topic)
print("Connected to MQTT: %s: %s" % (settings["host"], topic_path))
class MQTTData:
def __init__(self, server, user, password, sname):
self.topic = bytes('/'.join([user, 'feeds/{}_{{:s}}'.format(sname)]), 'utf-8')
client_id = hexlify(unique_id()).upper()
self.client = MQTTClient(client_id, server, user=user, password=password)
self.client.set_callback(self.buttons_cb)
self.client.connect()
# Subscribe to topics
for topic in ['btn', 'sampling']:
mqtt_button = self.topic.format(topic)
self.client.subscribe(mqtt_button)
self.sampling = SAMPLING
mqtt_sampling = self.topic.format('sampling')
self.client.publish(mqtt_sampling, bytes(str(self.sampling), 'utf-8'))
async def check_msg(self):
while True:
LOG.info('MQTT check message')
self.client.check_msg()
await asyncio.sleep_ms(5000)
def buttons_cb(self, topic, value):
LOG.info('Button pressed: %s %s', topic.decode(), value.decode())
if topic == self.topic.format('sampling'):
self.sampling = int(value)
elif topic == self.topic.format('btn') and value == b'reset':
reset()
async def run(self, sensor):
while True:
try:
data = sensor.get()
for key, value in data.items():
topic = self.topic.format(key)
self.client.publish(topic, bytes(str(value), 'utf-8'))
LOG.info('Publishing: (%s, %f)', key, value)
except OSError as exc:
LOG.error('MQTT %s %s', type(exc).__name__, exc)
await asyncio.sleep_ms(750)
else:
LOG.info("Sampling time: %d", self.sampling)
await asyncio.sleep(self.sampling)
def main(server="broker.hivemq.com", topic=b"testtopic/1"):
global msgRxd
global msgTime
msgCnt = 0
connectOut = machine.Pin(13, machine.Pin.OUT)
updateLedState(connectOut, msgCnt)
print("Connecting to MQTT server: ", server)
c = MQTTClient("umqtt_client", server)
c.set_callback(sub_cb)
c.connect()
print("Subscribing to: ", topic)
c.subscribe(topic)
lastMsgTime = msgTime
while True:
# Set to True/False depending on whether you want to test
# blocking I/O or not. NOTE: Setting to True makes it
# difficult to Control-C when using WebREPL.
if False:
# Blocking wait for message
print("Waiting for new message from topic: ", topic)
c.wait_msg()
else:
# Non-blocking wait for message
print("Checking for new message from topic: ", topic)
c.check_msg()
mtime = msgTime
msg = msgRxd
if mtime != lastMsgTime and msgRxd != None:
print((topic, msg))
lastMsgTime = mtime
msgCnt = msgCnt + 1
updateLedState(connectOut, msgCnt)
else:
# Then need to sleep to avoid 100% CPU usage (in a real
# app other useful actions would be performed instead)
time.sleep_ms(1000)
c.disconnect()
class DoorAlarm(object):
def __init__(self):
self.config = None
self.p0 = machine.Pin(2, machine.Pin.OUT)
def load_config(self):
with open('cfg.json', 'r') as cfg:
self.config = ujson.load(cfg)
def connect_wifi(self):
ap_if = network.WLAN(network.AP_IF)
ap_if.active(False)
sta_if = network.WLAN(network.STA_IF)
sta_if.active(True)
if sta_if.isconnected():
sta_if.disconnect()
sta_if.connect(self.config['ssid'], self.config['passwd'])
for _ in range(20):
time.sleep(1)
if sta_if.isconnected():
return
print('Unable to connect to AP: {}'.format(ssid))
sys.exit(1)
def mqtt_callback(self, topic, msg):
self.p0.value(not self.p0.value())
def mqtt_subscribe(self):
client_id = b'tom_' + ubinascii.hexlify(machine.unique_id())
self.mqtt = MQTTClient(client_id, self.config['host'],
port=int(self.config['port']))
self.mqtt.set_callback(self.mqtt_callback)
self.mqtt.connect()
self.mqtt.subscribe(self.config['topic'])
c.set_callback(sub_cb)
# Connect to server, requesting not to clean session for this
# client. If there was no existing session (False return value
# from connect() method), we perform the initial setup of client
# session - subscribe to needed topics. Afterwards, these
# subscriptions will be stored server-side, and will be persistent,
# (as we use clean_session=False).
#
# There can be a problem when a session for a given client exists,
# but doesn't have subscriptions a particular application expects.
# In this case, a session needs to be cleaned first. See
# example_reset_session.py for an obvious way how to do that.
#
# In an actual application, it's up to its developer how to
# manage these issues. One extreme is to have external "provisioning"
# phase, where initial session setup, and any further management of
# a session, is done by external tools. This allows to save resources
# on a small embedded device. Another extreme is to have an application
# to perform auto-setup (e.g., clean session, then re-create session
# on each restart). This example shows mid-line between these 2
# approaches, where initial setup of session is done by application,
# but if anything goes wrong, there's an external tool to clean session.
if not c.connect(clean_session=False):
print("New session being set up")
c.subscribe(b"foo_topic")
while 1:
c.wait_msg()
c.disconnect()
