Multiple responses to AT commands

Technical Subjects Open Solution
1

Hi, all,
I use an openWRT router and I am debugging EC25-E modem with AT commands with shell command “socat”.
example of usage:
root@OpenWrt:~# socat - /dev/ttyUSB2,crnl
AT+CFUN=1,1

I get response to my commands but responses are duplicated, many times:

root@OpenWrt:~# socat - /dev/ttyUSB2,crnl
ATI
ATI

Quectel

EC25

Revision: EC25EFAR06A10M4G

OK

ATI

Quectel

EC25

Revision: EC25EFAR06A10M4G

OK

…

Number of duplicates increases exponentially at each session, which is annoying and my impact the interpretation of respones analysing by scripts.

I don’t know if this is related to the modem or to socat command.
I am looking for another solution to send AT commands from OpenWRT shell.
Any ideas?

Thanks,

2

Try turning command echo off with ATE0

But perhaps there are two problems, and that will solve only one of them.

3

ATE0 command resolved the multiple echo, it’s perfect.
And I also resolved modem registration issue by enabling both IPv4 and IPv6. So all is fine.
Thank you!