How to filter undesired output in uart connection with screen

Asked Sep 17 '18 at 18:18

Active Sep 24 '18 at 07:35

Viewed 65 times

I'm connecting to an IP Camera's uart pins with the command :

sudo screen /dev/ttyUSB0 115200

and I got a root shell but it keeps flooding the console so I can't interact clearly with it ...

do you have an idea how to make it stop flooding and just respond what i ask ?

edited Sep 24 '18 at 07:35

Vadim Kotov

asked Sep 17 '18 at 18:18

Neolex

What `flooding` means? Excessive logging? Garbage? – Arkadiusz Drabczyk Sep 17 '18 at 19:17
yes it's logging things I don't care about... I'll try to kill the process logging if there is no other way. – Neolex Sep 18 '18 at 10:59
If there is `linux` running it might be possible that `dmesg` is continuously printing some logs - try `dmesg -n1`. – Arkadiusz Drabczyk Sep 18 '18 at 11:04
dmesg is not found, this looks like linux with only busybox – Neolex Sep 18 '18 at 17:04
`dmesg` is available in `busybox` - try `busybox dmesg`. It's also possible that these are not kernel logs. Can you access the device remotely, for example with ssh or telnet? – Arkadiusz Drabczyk Sep 18 '18 at 17:05
I thought i saw busybox but its not here i must be wrong. here is the only commands available : https://pastebin.com/n7pCeSCR I cant find the process to kill to stop the flood... – Neolex Sep 18 '18 at 19:21
and no i cant ssh or telnet on the device... but there is "telnetd".. i dont know if i can run a telnet server to connect it remotely ? – Neolex Sep 18 '18 at 19:23
1

Try `telnetd -l /bin/sh` to start telnet daemon and then connect with telnet from another machine. – Arkadiusz Drabczyk Sep 18 '18 at 19:25
Or try to disable serial logs: `echo 1 > /proc/sys/kernel/printk`. – Arkadiusz Drabczyk Sep 18 '18 at 19:26
Let us [continue this discussion in chat](https://chat.stackoverflow.com/rooms/180295/discussion-between-neolex-and-arkadiusz-drabczyk). – Neolex Sep 18 '18 at 19:31

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