blob: bcd72da610d8bf0f44226ce7ab4c4586477da358 (
plain)
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
|
#!/usr/bin/env python3
import asyncio
import json
import logging
from typing import Optional
from home.config import config
from home.temphum import SensorType, BaseSensor
from home.temphum.i2c import create_sensor
logger = logging.getLogger(__name__)
sensor: Optional[BaseSensor] = None
lock = asyncio.Lock()
delay = 0.01
async def get_measurements():
async with lock:
await asyncio.sleep(delay)
temp = sensor.temperature()
rh = sensor.humidity()
return rh, temp
async def handle_client(reader, writer):
request = None
while request != 'quit':
try:
request = await reader.read(255)
if request == b'\x04':
break
request = request.decode('utf-8').strip()
except Exception:
break
if request == 'read':
try:
rh, temp = await asyncio.wait_for(get_measurements(), timeout=3)
data = dict(humidity=rh, temp=temp)
except asyncio.TimeoutError as e:
logger.exception(e)
data = dict(error='i2c call timed out')
else:
data = dict(error='invalid request')
writer.write((json.dumps(data) + '\r\n').encode('utf-8'))
try:
await writer.drain()
except ConnectionResetError:
pass
writer.close()
async def run_server(host, port):
server = await asyncio.start_server(handle_client, host, port)
async with server:
logger.info('Server started.')
await server.serve_forever()
if __name__ == '__main__':
config.load()
if 'measure_delay' in config['sensor']:
delay = float(config['sensor']['measure_delay'])
sensor = create_sensor(SensorType(config['sensor']['type']),
int(config['sensor']['bus']))
try:
host, port = config.get_addr('server.listen')
asyncio.run(run_server(host, port))
except KeyboardInterrupt:
logging.info('Exiting...')
|
