3m50 still failing for socket.timeout occasionally

[cjkrolak]

after #78 was implemented I am still seeing a low level of socket.timeout failures on 3m50 thermostat, may need a longer delay.

2021-11-11 23:44:55: (session:1, poll:14) HEAT MODE [following schedule] act temp=66.5°F, set point=67, tolerance=2, override=68
DEBUG: get_current_mode entrypoint (switch position=1)
Traceback (most recent call last):
File "C:\Users\cjkro\onedrive\documents\github\ThermostatSupervisor\supervise.py", line 175, in

File "C:\Users\cjkro\onedrive\documents\github\ThermostatSupervisor\supervise.py", line 99, in main
while not api.max_measurement_count_exceeded(measurement):
File "C:\Users\cjkro\onedrive\documents\github\ThermostatSupervisor\thermostat_common.py", line 137, in get_current_mode
heat_schedule_point = int(self.get_schedule_heat_sp())
File "C:\Users\cjkro\onedrive\documents\github\ThermostatSupervisor\mmm.py", line 415, in get_schedule_heat_sp
result = self.get_schedule_setpoint(self.device_id.program_heat)
File "C:\Users\cjkro\AppData\Local\Programs\Python\Python39\lib\site-packages\radiotherm\fields.py", line 46, in get
envelope = json.loads(response.read().decode('utf-8'))
File "C:\Users\cjkro\AppData\Local\Programs\Python\Python39\lib\http\client.py", line 465, in read
return self._readall_chunked()
File "C:\Users\cjkro\AppData\Local\Programs\Python\Python39\lib\http\client.py", line 572, in _readall_chunked
chunk_left = self._get_chunk_left()
File "C:\Users\cjkro\AppData\Local\Programs\Python\Python39\lib\http\client.py", line 555, in _get_chunk_left
chunk_left = self._read_next_chunk_size()
File "C:\Users\cjkro\AppData\Local\Programs\Python\Python39\lib\http\client.py", line 515, in _read_next_chunk_size
line = self.fp.readline(_MAXLINE + 1)
File "C:\Users\cjkro\AppData\Local\Programs\Python\Python39\lib\socket.py", line 704, in readinto
return self._sock.recv_into(b)
socket.timeout: timed out

[cjkrolak]

original 10 second timeout deviation was based on data at this link: mhrivnak/radiotherm#47 (comment)
mean = 2.25, stdev = 1.25

added code to measure local network performance, both zones are currently performing within the 10 second limit with a 30 sample test, so failure must have been due to network congestion.
zone 0: mean=6.8, stdev=0.3, 6sigma=8.6
zone 1: mean=6.6, stdev=0.4, 6sigma=9.0

[cjkrolak]

updated testing with N=100:
zone 0: mean=6.9, stdev=0.5, max=9.9, 6sigma=9.9
zone 1: mean=6.9, stdev=1.7, max=20.4, 6sigma=17.1

based on this data I will use a 30 second timeout to avoid all possible timeouts due to network congestion.