2

I've completely configured the port with opened modem on ttyACM0 as my mobile device (HTC M8). However, it didn't allow me to enter anything.

I've tried with hotkey Ctrl-A Z, but there was no news. I don't know how to send an AT command to get more information.

If you've done so far, please help me get through this step or it's nice to have any idea.

Image1

Jeff Schaller
  • 66,199
  • 35
  • 114
  • 250
Huy DQ
  • 21
  • 1

1 Answers1

1

Typing <ret>ATZ<ret> should produce an OK prompt. Similarly for ATE1, ATI0, or AT&V

See also https://en.wikipedia.org/wiki/Hayes_command_set

J_H
  • 636
  • 4
  • 8
  • I've tried to type with three characters as `A` `T` `Z` like an invisible characters because they were not display in my screen and nothing then happened. I cannot enter anything even `OK`. – Huy DQ Nov 25 '17 at 15:36
  • It sounds like your ttyACM0 device is not connected to the desired modem, or not connected to a modem that is listening for commands, or perhaps speed/parity/flow-control don't match the device. In desperation you might try `+++` before the Z reset command above, but it sounds as though that's unlikely to work, either. Debug info from dmesg, lsusb, or the like might shed some light on it. – J_H Nov 25 '17 at 15:46
  • You're right. The `+++` doesn't work as I've tried. Thanks for your sharing. Please get back if you have any news or sharing. – Huy DQ Nov 25 '17 at 17:31