I am testing the AT commands on EC25 modem through SecureCRT software using telnet protocol.
In SecureCRT software there are 4 USB ports are showing ttyUSB0, ttyUSB1, ttyUSB2 and ttyUSB3.
Which port I should use to test AT commands please help.
I have one more issue observed while testing AT commands.
While testing AT commands when I send any command sometimes I have not received its response. I need to disconnect the device and again need to re-connect the device then I get the response.
For example I sent “AT+QSTK?” its response should be “+QSTK: 1,1,300” if STK is enabled.
But in this case if I sent above AT command its response is not printing on screen when I disconnect the device and connect it again and sent the same command the correct response gets print on screen.