class Modem(object):
# Initialize with simple defaults
def __init__(self, baud=None, port=None, delay=None):
if baud is None:
baud = Config.get("modem")["baud"]
if port is None:
port = Config.get("modem")["port"]
self.baud = baud
self.port = port
self.serialPort = serial.Serial(baudrate=baud, port=port)
self.data = ""
self.delay = delay
self.sbdring_time = 0
self.sbdix_time = 0
self.retry_count = 0
# Send two commands simultaneously
self.send_command("AT+SBDAREG=1;+SBDMTA=1;+SBDD2")
self.ready = False
self.Parser = Parse()
# String return of port status (for debugging)
def status(self):
baud = "baud: %r \n" % self.baud
isOpen = "isOpen: %r \n" % self.serialPort.isOpen()
port = "port: %r \n" % self.port
return (baud + isOpen + port)
# Send a command directly to the modem
def send_command(self, message):
command = "%s\r" % message
self.serialPort.write(bytes(command))
log.debug("Sent command: %s" % command)
if command == "AT+SBDIX":
self.retry_increment()
log.debug("************************************")
log.debug("************************************")
log.debug("************************************")
# Send an SBD message
def send_sbd_message(self, message, filename=''):
self.filename = filename
if len(message) > 270:
return False
else:
log.info(
"Sending message.\nChars: %s\nMessage: %s" %
(len(message), message)
)
self.send_command("AT+SBDWT=%s" % message)
return
# When we process the buffer the program either sends a command to the
# modem or parses the buffer as a response from Iridium.
def process_response(self, mode, callback):
if self.response in {"AT+SBDIX", "AT+SBDRT", "AT+SBDS"}:
self.send_command(self.response)
elif self.response == "CLEAR":
log.info("Clearing output buffer...")
self.send_command("AT+SBDD0")
if self.filename:
log.info("Deleting file: %s" % self.filename)
os.remove(self.filename)
elif self.response in {"AT+CSQF", "AT+SBDMTA=1", "AT+SBDAREG=1",
"AT+SBDAREG=1;+SBDMTA=1", "AT+SBDD", "AT+SBDS",
"AT\nOK"}:
log.info(self.response)
self.ready = True
elif self.response:
if callable(callback):
c = threading.Thread(target=callback, args=(self.response,))
c.start()
elif self.response is False:
log.info(self.response)
else:
print "ELSE"
log.info(self.response)
# The monitor function sets up a listener on the serial port to await
# commands.
def retry_reset(self):
self.retry_count = 0
self.sbdring_time = time.time()
def retry_increment(self):
self.retry_count += 1
def monitor(self, stop_event, mode, status, callback):
log.debug("Monitoring serial port '" + self.port + "'")
log.debug("Monitor mode: %s" % mode)
lines = ""
targetWordList = ["OK", "SBDRING"]
while True:
line = self.serialPort.readline()
lines += line
for word in targetWordList:
if word in line:
self.data = lines
lines = ""
if "SBDRING" in self.data:
# self.retry_reset() this could be causeing problems
status[0] = 'busy'
self.response = self.Parser.request(
self.data, self.delay, mode
)
# if "SBDIX" in self.response:
# self.retry_increment()
self.process_response(self.response, callback)
