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from __future__ import print_function
from serial import Serial
from serial import SerialException
from serial import SerialTimeoutException
class ModemcmdTimeoutException(Exception):
def __init__(self, msg):
self.msg = msg
class ModemcmdException(Exception):
def __init__(self, msg):
self.msg = msg
def modemcmd(port, cmd, timeout=0.3):
try:
serial = Serial(port=port,
timeout=float(timeout))
except SerialException as e:
raise ModemcmdException(e)
cmd = cmd + '\r'
try:
serial.write(cmd)
except SerialTimeoutException:
raise ModemcmdTimeoutException('Write timeout')
lines = serial.readlines()
if lines == '': # timeout
raise ModemcmdTimeoutException('Read timeout')
return "".join(lines)
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