初始化提交
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王立帮
260
boards/default/micropython_k210_mixgoai/build/lib/miot_no.py
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260
boards/default/micropython_k210_mixgoai/build/lib/miot_no.py
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import usocket as socket
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import ustruct as struct
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import network,time,board
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#from ubinascii import hexlify
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import ujson as json
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from machine import UART
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wifi_en=board.pin(19,board.GPIO.OUT)
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board.register(18,board.FPIOA.UART2_TX)
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board.register(17,board.FPIOA.UART2_RX)
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def wifi_enable(en):
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global wifi_en
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wifi_en.value(en)
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def wifi_reset():
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global uart
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wifi_enable(0)
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time.sleep_ms(200)
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wifi_enable(1)
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time.sleep(2)
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uart = UART(UART.UART2,115200,timeout=1000, read_buf_len=4096)
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tmp = uart.read()
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uart.write("AT+UART_CUR=921600,8,1,0,0\r\n")
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print(uart.read())
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uart = UART(UART.UART2,921600,timeout=1000, read_buf_len=10240) # important! baudrate too low or read_buf_len too small will loose data
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uart.write("AT\r\n")
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tmp = uart.read()
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print(tmp)
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if not tmp.endswith("OK\r\n"):
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print("reset fail")
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return None
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try:
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nic = network.ESP8285(uart)
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except Exception:
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return None
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return nic
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def get_data_dict(d):
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result = {"datastreams":[]}
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for x in d:
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result["datastreams"].append({"id":x,"datapoints":[{"value":d[x]}]})
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return result
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def pubData(value, state):
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value = get_data_dict(value)
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jdata = json.dumps(value)
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jlen = len(jdata)
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bdata = bytearray(jlen+3)
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bdata[0] = 1 # publish data in type of json
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bdata[1] = int(jlen / 256) # data lenght
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bdata[2] = jlen % 256 # data lenght
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bdata[3:jlen+4] = jdata.encode('ascii') # json data
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if state:
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print(value)
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print(bdata)
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return bdata
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def do_connect(account,password):
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nic=wifi_reset()
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if not nic:
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raise Exception("[Cool.AI]:WiFi init fail")
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nic.connect(account,password)
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nic.ifconfig()
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def init_MQTT_client(sid, address, cid, api, topic, callback):
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client = MQTTClient(sid, address, 6002, cid, api)
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client.set_callback(callback)
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client.connect()
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client.subscribe(bytes(topic, 'utf-8'))
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return client
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class MQTTException(Exception):
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pass
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class MQTTClient:
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def __init__(self, client_id, server, port=0, user=None, password=None, keepalive=0,ssl=False, ssl_params={}):
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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.addr = socket.getaddrinfo(server, port)[0][-1]
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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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self.sock.connect(self.addr)
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print(self.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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msg = bytearray(b"\x10\0\0\x04MQTT\x04\x02\0\0")
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msg[1] = 10 + 2 + len(self.client_id)
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msg[9] = clean_session << 1
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if self.user is not None:
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msg[1] += 2 + len(self.user) + 2 + len(self.pswd)
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msg[9] |= 0xC0
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if self.keepalive:
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assert self.keepalive < 65536
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msg[10] |= self.keepalive >> 8
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msg[11] |= self.keepalive & 0x00FF
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if self.lw_topic:
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msg[1] += 2 + len(self.lw_topic) + 2 + len(self.lw_msg)
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msg[9] |= 0x4 | (self.lw_qos & 0x1) << 3 | (self.lw_qos & 0x2) << 3
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msg[9] |= self.lw_retain << 5
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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, msg, is_print=True, topic='$dp', retain=False, qos=0):
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msg = pubData(msg, is_print)
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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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