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EHS5-E: Suddenly no response from RS232 line. | Thales IoT Developer Community

February 1, 2017 - 4:20pm, 4130 views

Hi

Our Device:

ATI
Cinterion
EHS5-E
REVISION 02.000

I have the problem here, that I suddenly receive no response from the Module.

Example:

I send an SMS over Serial RS232 with the following AT commands:

PC: AT+CREG?

Module: +CREG: 0,1 OK

PC: AT+CMGS="0123456789"<CR>

Module: <CR><LF>>

PC: 1234 #000<CTRL-Z>

Module: <CR><LF>+CMGS: 232<CR><LF><CR><LF>OK<CR><LF>

PC: ATH0<CR>

Module: <CR><LF>OK<CR><LF>

Then, 5s later, I send again the exact message, and I get immediately after the Prompt > an Error from the Module:

PC: AT+CMGS="0123456789"<CR>

Module: <CR><LF>>  <CR><LF>ERROR<CR><LF>

Module: <CR><LF>+CMGS: 233<CR><LF>

The Response +CMGS: 233 is the last signal from the Module, after this, it's not responding anymore to AT-Commands. I have to restart the Module to get it working again.

We use this modules in a few installations with exactly the same software who talks to the module, but only on on this system we have this problems.

- Firmware is the same like on the other working modules

- Module already changed

- Serial-Port on the PC changed

What could produce this issue? Can I read somewhere a diagnostic log?

Any help would be appreciated.

Regards, Stef