I got a new EG25-G USB+TTY test board for one of my projects. The device is detected on Ubuntu when I plug it in using the USB. Below is the debug info from usb devices. The modem is detected and the tty’s are available.
However, I do not get a response from any of the four ttyUSB i/f when I use the simplest AT command like AT or ATI. NOTE: I do not have a sim card inserted and see that there is a constant blue light blink on the test board. But my assumption is that the modem should atleast provide response to AT and ATI commands. I just keep getting unknown command ‘AT’. try ‘help’ whenever I run anything from microcom, including USBtty2 which I believe is for AT i/f.
Thank you, any help is much appreciated.