The sms_handler_demo not work on my huawei e303 modem, I have no response from the SMS that I send to the modem.

[Andati]

Add the following code after line 34 of sms_handler_demo.py:

modem.processStoredSms(unreadOnly=True)

So that the code reads:

try:    
    modem.processStoredSms(unreadOnly=True)
    modem.rxThread.join(2**31) # Specify a (huge) timeout so that it essentially blocks indefinitely, but still receives CTRL+C interrupt signal
finally:

[babca]

@mariolicona Make sure

• you're using fixed pyserial module (older v2.7, or v3.1a0+ from git), v3.0.1 is broken
• you're using the correct serial port - there's no notifications on /dev/ttyUSB0 port, you have to use /dev/ttyUSB2 instead
• notifications are visible with serial console (screen /dev/ttyUSB2 115200, or python tools/gsmterm.py -b 115200 /dev/ttyUSB2), you should see messages like ^BOOT, ^RSSI, ^CSNR etc.

@Andati good tip for processing all older messages from the period the python daemon was not running, but it can't resolve the issue that mariolicona describes.

[BaronBonet]

I'm also having this issue.

If I use Port = '/dev/ttyUSB0' I can read my number (using the own_number_demo.py example) and send messages (using the modem.sendSms() function). However, I cannot seem to be able to access /dev/ttyUSB2 so therefor I cannot receive messages.

• I am running Ubuntu 18.04 LTS
• I am using a Huawei K3765 modem
• I have changed permissions of dev/ttyUSB2 with the command chmod 777 /dev/ttyUSB2
• If I run any of the demos with PORT = '/dev/ttyUSB2' when i'm not calling sudo I get the following error:

  
  -> % python own_number_demo.py  
  Initializing modem...
  INFO: Connecting to modem on port /dev/ttyUSB2 at 115200bps
  Traceback (most recent call last):
  File "/home/eric/.local/lib/python3.6/site-packages/serial/serialposix.py", line 265, in open
  self.fd = os.open(self.portstr, os.O_RDWR | os.O_NOCTTY | os.O_NONBLOCK)
  OSError: [Errno 16] Device or resource busy: '/dev/ttyUSB2'

During handling of the above exception, another exception occurred:

Traceback (most recent call last): File "own_number_demo.py", line 38, in main() File "own_number_demo.py", line 22, in main modem.connect(PIN) File "/home/eric/.local/lib/python3.6/site-packages/gsmmodem/modem.py", line 199, in connect super(GsmModem, self).connect() File "/home/eric/.local/lib/python3.6/site-packages/gsmmodem/serial_comms.py", line 51, in connect timeout=self.timeout,*self.com_args,**self.com_kwargs) File "/home/eric/.local/lib/python3.6/site-packages/serial/serialutil.py", line 240, in init self.open() File "/home/eric/.local/lib/python3.6/site-packages/serial/serialposix.py", line 268, in open raise SerialException(msg.errno, "could not open port {}: {}".format(self._port, msg)) serial.serialutil.SerialException: [Errno 16] could not open port /dev/ttyUSB2: [Errno 16] Device or resource busy: '/dev/ttyUSB2'

- if I run the demos and call `sudo` I get this error

-> % sudo python own_number_demo.py Initializing modem... INFO: Connecting to modem on port /dev/ttyUSB2 at 115200bps DEBUG: write: ATZ Traceback (most recent call last): File "own_number_demo.py", line 38, in main() File "own_number_demo.py", line 22, in main modem.connect(PIN) File "/home/eric/.local/lib/python3.6/site-packages/gsmmodem/modem.py", line 211, in connect self.write('ATZ') # reset configuration File "/home/eric/.local/lib/python3.6/site-packages/gsmmodem/modem.py", line 459, in write responseLines = super(GsmModem, self).write(data + writeTerm, waitForResponse=waitForResponse, timeout=timeout, expectedResponseTermSeq=expectedResponseTermSeq) File "/home/eric/.local/lib/python3.6/site-packages/gsmmodem/serial_comms.py", line 144, in write raise TimeoutException() gsmmodem.exceptions.TimeoutException: None

Any advice would be appreciated @babca. 

After some digging i think this might be a lower level problem and have posted a question on [superuser stackExchange](https://superuser.com/questions/1412935/linux-cu-command-returns-line-in-use)

[babca]

1. Please use a maintained fork: https://github.com/babca/python-gsmmodem faucamp's repo is abandoned.

2. Have you tried to use '/dev/ttyUSB1' port as well?

3. The device can be occupied by a another program or another instance of gsmmodem which is still running. Check running processes.

I was never forced to use chmod on /dev/ttyUSBx, defaults should be fine.

[BaronBonet]

Hi @babca, thanks a lot for your reply. I am now using the maintained fork, and i just solved this issue.

I did try using /dev/ttyUSB1 that also did not work

I solved the use by running sudo lsof | grep tty from there i saw there was a process running on /dev/ttyUSB2 once i killed that process sudo kill <PID> I was able to run the examples using PORT = '/dev/ttyUSB2' and now it is functioning as expected.

The first time i didn't run lsof as the super user so i didn't see all the processes running.

If you think it would be helpful I'll happily transfer this information to your fork.

[babca]

I couldn't remember the last time I saw this error. Now I remember, it was a process which occupied the port, as well. The same reason.

I created a simple FAQ section in https://github.com/babca/python-gsmmodem/blob/master/README.rst. Feel free to improve it 👍

[BaronBonet]

Looks great, thanks for maintaining this project and documenting. I'm working on using this package in combination with Django to so i can upload messages to a cloud server, which are then sent to a local computer (in Lesotho) and then sent to local customers phones. The same also will work in reverse (messages from phones -> to local computer -> to cloud server). I'll try to document the process and once it's ready I'll share the project with you in case your interested.

Thanks again!

On Mon, Mar 11, 2019 at 6:22 PM babca notifications@github.com wrote:

I couldn't remember when I saw this error last time. Now I remember, it was a process which occupied the port, as well. The same reason.

I created a simple FAQ section in https://github.com/babca/python-gsmmodem/blob/master/README.rst. Feel free to improve it 👍

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[babca]

Great news Eric. Share it for everyone! :-)