Problems accessing AT Command on Quectel EC25

Raspberry Pi Network HATs 3G/4G&LTE Base HAT
1

Hi,

I have a Base Hat with a Quectel-EC25 which connects to the network using QMI just fine. However when I attempt to access modem stats using AT commands I get timeouts:

My command: atcom --port /dev/ttyUSB2 AT+CSQ
Returns: [ERR] Timeout, couldn’t get response

I have tried different ttyUSB numbers, and for reference this is running on a Pi 5. I have a Pi 4 with exactly the same setup and AT commands work fine.

Any thoughts would be appreciated…

2

I just tried via minicom using:

sudo minicom -b 115200 -D /dev/ttyUSB2

And I can send AT commands this way. Hoping to get ATCOM working

3

Hi,

The port may be busy when you send the command; you can try ttyUSB3.

4

Hi, thanks for the quick reply

Same result when I try ttyUSB3

atcom --port /dev/ttyUSB3 AT+CSQ

[ERR] Timeout, couldn’t get response