initial
This commit is contained in:
commit
eb73818297
GPG Key ID:
836E9E1192A6B132
2
.gitignore
vendored
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2
.gitignore
vendored
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secrets.py
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5
config.py
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5
config.py
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ssid = 'telemetry'
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mqtt_server = '172.16.10.47'
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heartbeat_topic = b'IoT/rpipwThermometer/0/Heartbeat'
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watchdog_topic = b'IoT/Watchdog'
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77
main.py
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77
main.py
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# main.py -- put your code here!
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from umqttsimple import MQTTClient
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import time
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import ubinascii
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from machine import WDT
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import network
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import os
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import config
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import secrets
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last_message = 0
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message_interval = 5
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counter = 0
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ringFlag = False
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wdt = None
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wdtCnt = 0
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client = None
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def init():
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wlan = network.WLAN(network.STA_IF)
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wlan.active(True)
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wlan.connect(config.ssid, secrets.wpakey)
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while (not wlan.isconnected()):
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print('Not yet connected to WLAN')
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print('Connected to WLAN')
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global client
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clientId = ubinascii.hexlify(bytearray(os.urandom(16))).decode()
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client = MQTTClient(clientId, config.mqtt_server, keepalive=60, ssl=True)
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client.set_callback(mqtt_callback)
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client.connect()
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client.subscribe(config.watchdog_topic)
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print(f"Connected to {config.mqtt_server} MQTT Broker")
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global wdt
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wdt = WDT(timeout=5000)
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wdt.feed()
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print("Watchdog enabled")
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def mqtt_callback(topic, msg):
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global wdt, wdtCnt
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print(f"Received: {topic}: {msg}")
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if topic == config.watchdog_topic:
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wdtCnt += 1
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print(f"feed watchdog {wdtCnt}")
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wdt.feed()
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def main():
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global client
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print("Hello")
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time.sleep(1)
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try:
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init()
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except Exception as e:
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print(f"Some error when starting: {e}")
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time.sleep(15)
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machine.reset()
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last_time = time.ticks_ms()
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while True:
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current_time = time.ticks_ms()
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if (time.ticks_diff(current_time, last_time) > 250):
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last_time = current_time
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client.ping()
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client.wait_msg()
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client.disconnect()
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if __name__ == "__main__":
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main()
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215
umqttsimple.py
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215
umqttsimple.py
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import usocket as socket
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import ustruct as struct
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from ubinascii import hexlify
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class MQTTException(Exception):
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pass
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class MQTTClient:
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def __init__(
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self,
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client_id,
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server,
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port=0,
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user=None,
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password=None,
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keepalive=0,
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ssl=False,
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ssl_params={},
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):
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if port == 0:
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port = 8883 if ssl else 1883
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self.client_id = client_id
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self.sock = None
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self.server = server
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self.port = port
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self.ssl = ssl
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self.ssl_params = ssl_params
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self.pid = 0
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self.cb = None
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self.user = user
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self.pswd = password
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self.keepalive = keepalive
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self.lw_topic = None
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self.lw_msg = None
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self.lw_qos = 0
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self.lw_retain = False
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def _send_str(self, s):
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self.sock.write(struct.pack("!H", len(s)))
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self.sock.write(s)
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def _recv_len(self):
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n = 0
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sh = 0
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while 1:
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b = self.sock.read(1)[0]
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n |= (b & 0x7F) << sh
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if not b & 0x80:
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return n
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sh += 7
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def set_callback(self, f):
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self.cb = f
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def set_last_will(self, topic, msg, retain=False, qos=0):
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assert 0 <= qos <= 2
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assert topic
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self.lw_topic = topic
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self.lw_msg = msg
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self.lw_qos = qos
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self.lw_retain = retain
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def connect(self, clean_session=True):
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self.sock = socket.socket()
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addr = socket.getaddrinfo(self.server, self.port)[0][-1]
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self.sock.connect(addr)
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if self.ssl:
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import ussl
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self.sock = ussl.wrap_socket(self.sock, **self.ssl_params)
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premsg = bytearray(b"\x10\0\0\0\0\0")
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msg = bytearray(b"\x04MQTT\x04\x02\0\0")
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sz = 10 + 2 + len(self.client_id)
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msg[6] = clean_session << 1
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if self.user is not None:
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sz += 2 + len(self.user) + 2 + len(self.pswd)
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msg[6] |= 0xC0
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if self.keepalive:
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assert self.keepalive < 65536
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msg[7] |= self.keepalive >> 8
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msg[8] |= self.keepalive & 0x00FF
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if self.lw_topic:
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sz += 2 + len(self.lw_topic) + 2 + len(self.lw_msg)
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msg[6] |= 0x4 | (self.lw_qos & 0x1) << 3 | (self.lw_qos & 0x2) << 3
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msg[6] |= self.lw_retain << 5
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i = 1
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while sz > 0x7F:
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premsg[i] = (sz & 0x7F) | 0x80
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sz >>= 7
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i += 1
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premsg[i] = sz
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self.sock.write(premsg, i + 2)
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self.sock.write(msg)
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# print(hex(len(msg)), hexlify(msg, ":"))
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self._send_str(self.client_id)
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if self.lw_topic:
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self._send_str(self.lw_topic)
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self._send_str(self.lw_msg)
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if self.user is not None:
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self._send_str(self.user)
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self._send_str(self.pswd)
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resp = self.sock.read(4)
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assert resp[0] == 0x20 and resp[1] == 0x02
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if resp[3] != 0:
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raise MQTTException(resp[3])
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return resp[2] & 1
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def disconnect(self):
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self.sock.write(b"\xe0\0")
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self.sock.close()
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def ping(self):
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self.sock.write(b"\xc0\0")
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def publish(self, topic, msg, retain=False, qos=0):
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pkt = bytearray(b"\x30\0\0\0")
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pkt[0] |= qos << 1 | retain
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sz = 2 + len(topic) + len(msg)
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if qos > 0:
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sz += 2
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assert sz < 2097152
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i = 1
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while sz > 0x7F:
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pkt[i] = (sz & 0x7F) | 0x80
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sz >>= 7
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i += 1
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pkt[i] = sz
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# print(hex(len(pkt)), hexlify(pkt, ":"))
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self.sock.write(pkt, i + 1)
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self._send_str(topic)
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if qos > 0:
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self.pid += 1
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pid = self.pid
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struct.pack_into("!H", pkt, 0, pid)
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self.sock.write(pkt, 2)
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self.sock.write(msg)
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if qos == 1:
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while 1:
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op = self.wait_msg()
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if op == 0x40:
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sz = self.sock.read(1)
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assert sz == b"\x02"
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rcv_pid = self.sock.read(2)
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rcv_pid = rcv_pid[0] << 8 | rcv_pid[1]
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if pid == rcv_pid:
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return
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elif qos == 2:
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assert 0
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def subscribe(self, topic, qos=0):
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assert self.cb is not None, "Subscribe callback is not set"
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pkt = bytearray(b"\x82\0\0\0")
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self.pid += 1
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struct.pack_into("!BH", pkt, 1, 2 + 2 + len(topic) + 1, self.pid)
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# print(hex(len(pkt)), hexlify(pkt, ":"))
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self.sock.write(pkt)
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self._send_str(topic)
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self.sock.write(qos.to_bytes(1, "little"))
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while 1:
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op = self.wait_msg()
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if op == 0x90:
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resp = self.sock.read(4)
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# print(resp)
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assert resp[1] == pkt[2] and resp[2] == pkt[3]
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if resp[3] == 0x80:
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raise MQTTException(resp[3])
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return
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# Wait for a single incoming MQTT message and process it.
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# Subscribed messages are delivered to a callback previously
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# set by .set_callback() method. Other (internal) MQTT
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# messages processed internally.
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def wait_msg(self):
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res = self.sock.read(1)
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#self.sock.setblocking(True)
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if res is None:
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return None
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if res == b"":
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raise OSError(-1)
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if res == b"\xd0": # PINGRESP
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sz = self.sock.read(1)[0]
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assert sz == 0
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return None
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op = res[0]
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if op & 0xF0 != 0x30:
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return op
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sz = self._recv_len()
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topic_len = self.sock.read(2)
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topic_len = (topic_len[0] << 8) | topic_len[1]
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topic = self.sock.read(topic_len)
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sz -= topic_len + 2
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if op & 6:
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pid = self.sock.read(2)
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pid = pid[0] << 8 | pid[1]
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sz -= 2
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msg = self.sock.read(sz)
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self.cb(topic, msg)
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if op & 6 == 2:
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pkt = bytearray(b"\x40\x02\0\0")
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struct.pack_into("!H", pkt, 2, pid)
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self.sock.write(pkt)
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elif op & 6 == 4:
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assert 0
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# Checks whether a pending message from server is available.
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# If not, returns immediately with None. Otherwise, does
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# the same processing as wait_msg.
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def check_msg(self):
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self.sock.setblocking(False)
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return self.wait_msg()
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120
urequest.py
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120
urequest.py
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import usocket
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import ujson
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try:
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import ussl
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SUPPORT_SSL = True
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except ImportError:
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ussl = None
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SUPPORT_SSL = False
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SUPPORT_TIMEOUT = hasattr(usocket.socket, 'settimeout')
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CONTENT_TYPE_JSON = 'application/json'
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class Response(object):
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def __init__(self, status_code, raw):
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self.status_code = status_code
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self.raw = raw
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self._content = False
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self.encoding = 'utf-8'
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@property
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def content(self):
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if self._content is False:
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self._content = self.raw.read()
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self.raw.close()
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self.raw = None
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return self._content
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@property
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def text(self):
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content = self.content
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return str(content, self.encoding) if content else ''
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def close(self):
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if self.raw is not None:
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self._content = None
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self.raw.close()
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self.raw = None
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def json(self):
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return ujson.loads(self.text)
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def raise_for_status(self):
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if 400 <= self.status_code < 500:
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raise OSError('Client error: %s' % self.status_code)
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if 500 <= self.status_code < 600:
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raise OSError('Server error: %s' % self.status_code)
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# Adapted from upip
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def request(method, url, json=None, timeout=None, headers=None):
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urlparts = url.split('/', 3)
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proto = urlparts[0]
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host = urlparts[2]
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urlpath = '' if len(urlparts) < 4 else urlparts[3]
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if proto == 'http:':
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port = 80
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elif proto == 'https:':
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port = 443
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else:
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raise OSError('Unsupported protocol: %s' % proto[:-1])
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if ':' in host:
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host, port = host.split(':')
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port = int(port)
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if json is not None:
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content = ujson.dumps(json)
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content_type = CONTENT_TYPE_JSON
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else:
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content = None
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ai = usocket.getaddrinfo(host, port)
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addr = ai[0][4]
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sock = usocket.socket()
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if timeout is not None:
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assert SUPPORT_TIMEOUT, 'Socket does not support timeout'
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sock.settimeout(timeout)
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sock.connect(addr)
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if proto == 'https:':
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assert SUPPORT_SSL, 'HTTPS not supported: could not find ussl'
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sock = ussl.wrap_socket(sock)
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sock.write('%s /%s HTTP/1.0\r\nHost: %s\r\n' % (method, urlpath, host))
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if headers is not None:
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for header in headers.items():
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sock.write('%s: %s\r\n' % header)
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if content is not None:
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sock.write('content-length: %s\r\n' % len(content))
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sock.write('content-type: %s\r\n' % content_type)
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sock.write('\r\n')
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sock.write(content)
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else:
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sock.write('\r\n')
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l = sock.readline()
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protover, status, msg = l.split(None, 2)
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# Skip headers
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while sock.readline() != b'\r\n':
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pass
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return Response(int(status), sock)
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def get(url, **kwargs):
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return request('GET', url, **kwargs)
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def post(url, **kwargs):
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return request('POST', url, **kwargs)
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