def wifi():
global client
global CLIENT_ID
client = MQTTClient(CLIENT_ID, 'q.emqtt.com')
client.set_callback(sub_cb)
client.connect()
print("MQTT client id:", CLIENT_ID)
time.sleep(2)
run()
class Daemon():
def __init__(self, delay=0):
self.fs = []
self.delay = delay
self.g = {}
self.mqtt = None
self.timers = []
self.recv_ser = None
self.send_ser = None
self.serial_mode = False
self.send_cache = None
self.recv = b''
def wifi(self, ssid, pwd, test_mqtt=True):
wlan = network.WLAN(network.STA_IF)
if not wlan.isconnected():
print('Connecting to network...')
wlan.active(True)
wlan.connect(ssid, pwd)
t = time.time()
while not wlan.isconnected():
if time.time() - t > 15:
print(
'Network Connect Error, Please Press [RST] To Retry...'
)
if self.serial_mode:
self.send_ser.write('[sta|exit]')
wlan.active(False)
sys.exit()
print('Network config: ', wlan.ifconfig())
else:
print('Network already connect: ', wlan.ifconfig())
for i in range(5):
try:
set_ntp_time()
break
except Exception as e:
print(e)
if i < 4:
print('ntp time set error...try again...')
else:
print('ntp time set error! will just use local time')
if test_mqtt:
self.mqtt_init()
def mqtt_init(self,
host='test.mosquitto.org',
port=1883,
user=None,
pwd=None):
self.mqtt = MQTTClient('default', host, port, user=user, password=pwd)
self.mqtt.connect()
assert self.mqtt is not None, 'mqtt connect error!'
def set_timer(self, delta_time, f):
trigger_time = int(time.time()) + int(delta_time)
self.timers.append([trigger_time, f])
def loop(self, f):
self.fs.append(f)
def run_once(self):
if self.mqtt is not None:
self.mqtt.check_msg()
if self.serial_mode:
self.serial_daemon_once()
return
for f in self.fs:
f()
for timer_i in range(len(self.timers)):
if time.time() >= self.timers[timer_i][0]:
self.timers[timer_i][1]()
del self.timers[timer_i]
break
def run(self):
print('Start Running...')
while True:
try:
self.run_once()
except Exception as e:
pass
print(e)
time.sleep(self.delay)
def pub(self, *args, **kwargs):
assert self.mqtt is not None, 'MQTT not init!'
self.mqtt.publish(*args, **kwargs)
def sub(self, *args, **kwargs):
assert self.mqtt is not None, 'MQTT not init!'
def _reg_f(f):
self.mqtt.set_callback(f)
self.mqtt.subscribe(*args, **kwargs)
return _reg_f
def serial_init(self, baudrate=115200):
self.recv_ser = UART(0, baudrate)
self.send_ser = UART(1, baudrate)
self.recv_ser.init(baudrate, bits=8, parity=None, stop=1)
self.send_ser.init(baudrate, bits=8, parity=None, stop=1)
self.serial_mode = True
def serial_send(self, topic, msg):
# topic = topic.decode('utf-8')
# msg = msg.decode('utf-8')
resp = b'[sub|' + topic + b'|' + msg + b']'
print('send resp: {}'.format(resp))
self.send_ser.write(resp)
def serial_daemon_once(self):
while self.recv_ser.any():
self.recv += self.recv_ser.read()
if b'[' in self.recv and b']' in self.recv:
break
if b'[' in self.recv and b']' in self.recv:
recv = self.recv.strip().split(b'[')[1].split(b']')[0]
self.recv = b''
recv = recv.decode('utf-8')
print('recv cmd: {}'.format(recv))
recv = recv.split('|')
cmd = recv[0]
args = recv[1:]
if cmd.lower() == 'pub' and len(args) == 2:
topic, msg = args
pub(topic, msg)
elif cmd.lower() == 'sub' and len(args) == 1:
topic = args[0]
# self.sub(topic)(self.serial_send)
self.mqtt.set_callback(self.serial_send)
self.mqtt.subscribe(topic)
elif cmd.lower() == 'wif' and len(args) == 2:
wifiname, wifipwd = args
self.wifi(wifiname, wifipwd, test_mqtt=False)
elif cmd.lower() == 'svr' and len(args) >= 1:
host = args[0]
port = 1883
user = None
pwd = None
if len(args) >= 2:
port = int(args[1])
if len(args) == 4:
user = args[2]
pwd = args[3]
self.mqtt_init(host, port, user, pwd)
elif cmd.lower() == 'sys' and len(args) >= 1:
if args[0] == 'reboot':
self.send_ser.write('[sta|rebooting]')
machine.reset()
else:
self.send_ser.write('[sta|no_cmd]')
return
self.send_ser.write('[sta|ok]')
from time import sleep
from simple_mqtt import MQTTClient
from machine import Pin
from dht import DHT22
import socket
# See https://www.youtube.com/watch?v=_vcQTyLU1WY
# your server needs a STATIC IP ADDRESS!!!
SERVER = "192.168.0.10" # MQTT Server Address (Change to the IP address of your Pi)
CLIENT_ID = 'ESP32_DHT22_Sensor'
TOPIC = b'temp_humidity'
client = MQTTClient(CLIENT_ID, SERVER)
client.connect() # Connect to MQTT broker
# CHECK HERE THE PIN YOU USE!!!!
# DHT-22 on GPIO 14 (input with internal pull-up resistor)
# This model of ESP8266 on D5 == GPIO 14
# on ESP32 D5 is GPIO 5
sensor = DHT22(Pin(5, Pin.IN, Pin.PULL_UP))
while True:
try:
sensor.measure() # Poll sensor
t = sensor.temperature()
h = sensor.humidity()
if isinstance(t, float) and isinstance(
h, float): # Confirm sensor results are numeric
msg = (b'{0:3.1f},{1:3.1f}'.format(t, h))
def pub_it(server="mqtt.just4fun.site"):
c = MQTTClient("umqtt_client_pub", server)
c.connect()
# c.publish(b"/test_umqtt", b"hello") #qos=1
c.publish(b"/test_pub_umqtt", b"hello", qos=1, retain=True)
c.disconnect()
import socket
import ujson as json
# See https://www.youtube.com/watch?v=_vcQTyLU1WY
# See https://github.com/CapableRobot/SenseTemp/blob/master/software-micropython/main-mqtt.py
# read settings
settings = json.load(open("settings.json", 'r'))
client = MQTTClient(client_id=settings['device']['name'],
server=settings['mqtt']['server'],
user=settings['mqtt']['user'],
password=settings['mqtt']['key'],
ssl=False)
# Connect to MQTT broker
client.connect()
print("MQTT Client : Connected")
# CHECK HERE THE PIN YOU USE!!!!
# DHT-22 on GPIO 14 (input with internal pull-up resistor)
# This model of ESP8266 on D5 == GPIO 14
# This model of ESP32 on D5 == GPIO 5
sensor = DHT22(Pin(5, Pin.IN, Pin.PULL_UP))
# we will send data in csv format
topic_temp = settings['mqtt']['feed'] + "-temperature"
topic_hum = settings['mqtt']['feed'] + "-humidity"
while True:
try:
# Poll sensor
sensor.measure()