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158 lines
5.5 KiB
Python
158 lines
5.5 KiB
Python
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#!/usr/bin/python
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# Author: Jon Trulson <jtrulson@ics.com>
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# Copyright (c) 2017 Intel Corporation.
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#
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# Permission is hereby granted, free of charge, to any person obtaining
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# a copy of this software and associated documentation files (the
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# "Software"), to deal in the Software without restriction, including
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# without limitation the rights to use, copy, modify, merge, publish,
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# distribute, sublicense, and/or sell copies of the Software, and to
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# permit persons to whom the Software is furnished to do so, subject to
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# the following conditions:
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#
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# The above copyright notice and this permission notice shall be
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# included in all copies or substantial portions of the Software.
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#
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# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
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# LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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# OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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# WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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from __future__ import print_function
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import time, sys, signal, atexit
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from upm import pyupm_uartat as UARTAT
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def main():
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## Exit handlers ##
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# This function stops python from printing a stacktrace when you
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# hit control-C
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def SIGINTHandler(signum, frame):
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raise SystemExit
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# This function lets you run code on exit, including functions from sensor
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def exitHandler():
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print("Exiting")
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sys.exit(0)
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# Register exit handlers
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atexit.register(exitHandler)
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signal.signal(signal.SIGINT, SIGINTHandler)
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defaultDev = "/dev/ttyUSB0"
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# if an argument was specified, use it as the device instead
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if (len(sys.argv) > 1):
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defaultDev = sys.argv[1]
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print("Using device:", defaultDev);
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# Instantiate a UARTAT sensor on defaultDev at 115200 baud.
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sensor = UARTAT.UARTAT(defaultDev, 115200)
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# This is a simplistic example that tries to configure the LE910,
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# and use it's built-in socket capabilities to connect to a
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# remote host, obtain a small piece of data, and return it. It's
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# mainly intended to show you how you can use the various AT
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# commands supported by the LE910 to perform simple tasks.
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#
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# You must have a valid SIM card with an active data plan for
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# this example to do anything interesting.
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#
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# See the LE910 AT Commands reference for full information on
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# what is possible with this device. The uartat driver is
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# intended to make it a little easier to control AT-style
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# devices, but is by no means a full-featured communication
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# infrastructure. A "real" application will probably need to be
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# much more sophisticated with regard to parsing, doing retries,
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# etc.
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#
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# For experimenting with various AT commands, try using an
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# interactive terminal emulator like minicom or screen.
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# make sure we are in command mode
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if (not sensor.inCommandMode()):
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print("Not in command mode, switching...")
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sensor.commandMode("+++", 1000)
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# flter out CR's in responses by default
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sensor.filterCR(True)
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print("Configuring modem...")
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# discard any waiting characters
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sensor.drain()
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# reset modem
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sensor.command("ATZ\r")
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# turn off command echo, set verbosity to 1, enable data
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# connection mode
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sensor.command("ATE0 V1 +FCLASS=0\r")
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sensor.drain()
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# Now issue some commands and output the results.
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print("Modem and SIM information:")
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bufferLength = 256
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buffer = sensor.commandWithResponse("AT+ICCID\r", bufferLength)
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if (buffer):
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print("ICCID (SIM ID):", buffer)
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buffer = sensor.commandWithResponse("AT+CGSN=1\r", bufferLength)
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if (buffer):
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print("IMEI: ", buffer)
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# see if we are on the network....
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buffer = sensor.commandWithResponse("AT+CREG?\r", bufferLength)
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if (buffer):
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print(buffer)
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# look for "CGREG: 0,1" or "CGREG: 0,5"
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if (sensor.find(buffer, "CREG: 0,1") or
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sensor.find(buffer, "CREG: 0,5")):
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print("Connected to the cell data network.")
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# wait up to 5 seconds for responses now...
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sensor.setResponseWaitTime(5000)
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# setup PDP context (socket 1). An ERROR repsonse is
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# possible if the PDP context is already set up.
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sensor.command("AT#SGACT=1,1\r")
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# setup a TCP socket to nist.gov and read the timestamp.
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print("Connecting to time-a.nist.gov, TCP port 13")
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# Wait up to 60 seconds to find the NO CARRIER
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# string, which will be present at the end, if the
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# connection succeeded and the requested data was
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# obtained.
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buffer = sensor.commandWaitFor("AT#SD=1,0,13,\"time-a.nist.gov\"\r",
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bufferLength, "\nNO CARRIER\n", 60000)
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if (buffer):
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# print out the response
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print("RESPONSE: ")
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print(buffer)
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else:
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print("No response.")
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# destroy PDP context
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sensor.setResponseWaitTime(250)
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sensor.command("AT#SGACT=1,0\r")
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else:
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print("You do not appear to be connected to the network...")
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else:
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print("Error executing query\n")
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# reset the modem
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sensor.command("ATZ\r")
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if __name__ == '__main__':
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main()
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