-
Notifications
You must be signed in to change notification settings - Fork 0
/
BlynkLib.py
235 lines (193 loc) · 7.19 KB
/
BlynkLib.py
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
# Copyright (c) 2015-2018 Volodymyr Shymanskyy. See the file LICENSE for copying permission.
_VERSION = "0.2.0"
import struct
import time
try:
import machine
gettime = lambda: time.ticks_ms()
except ImportError:
const = lambda x: x
gettime = lambda: int(time.time() * 1000)
def dummy(*args):
pass
MSG_RSP = const(0)
MSG_LOGIN = const(2)
MSG_PING = const(6)
MSG_TWEET = const(12)
MSG_EMAIL = const(13)
MSG_NOTIFY = const(14)
MSG_BRIDGE = const(15)
MSG_HW_SYNC = const(16)
MSG_INTERNAL = const(17)
MSG_PROPERTY = const(19)
MSG_HW = const(20)
MSG_EVENT_LOG = const(64)
MSG_REDIRECT = const(41) # TODO: not implemented
MSG_DBG_PRINT = const(55) # TODO: not implemented
STA_SUCCESS = const(200)
STA_INVALID_TOKEN = const(9)
DISCONNECTED = const(0)
CONNECTING = const(1)
CONNECTED = const(2)
print("""
___ __ __
/ _ )/ /_ _____ / /__
/ _ / / // / _ \\/ '_/
/____/_/\\_, /_//_/_/\\_\\
/___/ for Python v""" + _VERSION + "\n")
class BlynkProtocol:
def __init__(self, auth, heartbeat=10, buffin=1024, log=None):
self.callbacks = {}
self.heartbeat = heartbeat*1000
self.buffin = buffin
self.log = log or dummy
self.auth = auth
self.state = DISCONNECTED
self.connect()
def on(self, evt, func):
self.callbacks[evt] = func
def ON(blynk, evt):
class Decorator:
def __init__(self, func):
self.func = func
blynk.callbacks[evt] = func
def __call__(self):
return self.func()
return Decorator
def emit(self, evt, *a, **kv):
self.log("Event:", evt, "->", *a)
if evt in self.callbacks:
self.callbacks[evt](*a, **kv)
def virtual_write(self, pin, *val):
self.sendMsg(MSG_HW, 'vw', pin, *val)
def set_property(self, pin, prop, *val):
self.sendMsg(MSG_PROPERTY, pin, prop, *val)
def sync_virtual(self, *pins):
self.sendMsg(MSG_HW_SYNC, 'vr', *pins)
def notify(self, msg):
self.sendMsg(MSG_NOTIFY, msg)
def log_event(self, event, descr=None):
if descr==None:
self.sendMsg(MSG_EVENT_LOG, event)
else:
self.sendMsg(MSG_EVENT_LOG, event, descr)
def sendMsg(self, cmd, *args, **kwargs):
if "id" in kwargs:
id = kwargs.id
else:
id = self.msg_id
self.msg_id += 1
if self.msg_id > 0xFFFF:
self.msg_id = 1
if cmd == MSG_RSP:
data = b''
dlen = args[0]
else:
data = ('\0'.join(map(str, args))).encode('utf-8')
dlen = len(data)
self.log('<', cmd, id, '|', *args)
msg = struct.pack("!BHH", cmd, id, dlen) + data
self.lastSend = gettime()
self._send(msg)
def connect(self):
if self.state != DISCONNECTED: return
self.msg_id = 1
(self.lastRecv, self.lastSend, self.lastPing) = (gettime(), 0, 0)
self.bin = b""
self.state = CONNECTING
self.sendMsg(MSG_LOGIN, self.auth)
def disconnect(self):
if self.state == DISCONNECTED: return
self.state = DISCONNECTED
self.emit('disconnected')
def process(self, data=b''):
if not (self.state == CONNECTING or self.state == CONNECTED): return
now = gettime()
if now - self.lastRecv > self.heartbeat+(self.heartbeat/2):
return self.disconnect()
if (now - self.lastPing > self.heartbeat/10 and
(now - self.lastSend > self.heartbeat or
now - self.lastRecv > self.heartbeat)):
self.sendMsg(MSG_PING)
self.lastPing = now
if data != None and len(data):
self.bin += data
while True:
if len(self.bin) < 5: return
cmd, i, dlen = struct.unpack("!BHH", self.bin[:5])
if i == 0: return self.disconnect()
self.lastRecv = now
if cmd == MSG_RSP:
self.bin = self.bin[5:]
self.log('>', cmd, i, '|', dlen)
if self.state == CONNECTING and i == 1:
if dlen == STA_SUCCESS:
self.state = CONNECTED
dt = now - self.lastSend
self.sendMsg(MSG_INTERNAL, 'ver', _VERSION, 'h-beat', self.heartbeat//1000, 'buff-in', self.buffin, 'dev', 'python')
self.emit('connected', ping=dt)
else:
if dlen == STA_INVALID_TOKEN:
print("Invalid auth token")
return self.disconnect()
else:
if dlen >= self.buffin:
print("Cmd too big: ", dlen)
return self.disconnect()
if len(self.bin) < 5+dlen: return
data = self.bin[5:5+dlen]
self.bin = self.bin[5+dlen:]
args = list(map(lambda x: x.decode('ascii'), data.split(b'\0')))
self.log('>', cmd, i, '|', ','.join(args))
if cmd == MSG_PING:
self.sendMsg(MSG_RSP, STA_SUCCESS, id=i)
elif cmd == MSG_HW or cmd == MSG_BRIDGE:
if args[0] == 'vw':
self.emit("V"+args[1], args[2:])
elif args[0] == 'vr':
self.emit("readV"+args[1])
elif cmd == MSG_INTERNAL:
pass
else:
print("Unexpected command: ", cmd)
return self.disconnect()
def VIRTUAL_READ(blynk, pin):
class Decorator():
def __init__(self, func):
self.func = func
blynk.callbacks["readV"+str(pin)] = func
def __call__(self):
return self.func()
return Decorator
def VIRTUAL_WRITE(blynk, pin):
class Decorator():
def __init__(self, func):
self.func = func
blynk.callbacks["V"+str(pin)] = func
def __call__(self):
return self.func()
return Decorator
import socket
class Blynk(BlynkProtocol):
def __init__(self, auth, **kwargs):
BlynkProtocol.__init__(self, auth, **kwargs)
def connect(self):
try:
self.conn = socket.socket()
self.conn.connect(socket.getaddrinfo("blynk-cloud.com", 80)[0][4])
self.conn.settimeout(0.05)
BlynkProtocol.connect(self)
except:
raise ValueError('connection with the Blynk servers failed')
def _send(self, data):
self.conn.send(data)
# TODO: handle disconnect
def run(self):
data = b''
try:
data = self.conn.recv(self.buffin)
except KeyboardInterrupt:
raise
except: # TODO: handle disconnect
pass
self.process(data)