AT Command no response | Telit Cinterion IoT Developer Community
May 4, 2020 - 6:09am, 922 views
Hello, Our GSM Module - EHS6 A400 can't use at-command via USB-serial port. There is no response anything. Before we installed JRC-1.56.54.jad file, it worked but my application not worked. after that we try install JRC-1.56.54.jad file in to module, at-command can't use, there is no response but my laptop still found the list of serial port of modem as the picture, Do you have any suggestion to solve this problem please ?
Hello,
The module enumerates which suggests that it is working.
AT commands can be used on some of (not all) USB ports (depending on the configuration). You should also be able to send commands on the modem port - please open 'Cinterion EHSx Java Debug Modem USB' in device manager and find the port number. Please close all USB connections to the module (in terminals) and reboot it. Try to unplug the module fro power supply if still nothing.
If you still can't communicate you can try RS232 port - at least ASC0 should work - please use RTS/CTS hardware flow control as power saving on serial interfaces is enabled by default.
Do you have any other EHSx module to check with your system?
Is there any output available? Is there any custom application running on the module? Please see if there's any output on the application debug interface.
JRC MIDlets are distributed together with the firmware usf files, gWinSwup application also installs both as each firmware has a dedicated JRC version.
Regards,
Bartłomiej