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I'm working with a device connected to my PC via serial port.
When i send a command to this device (using putty or minicom) it send me back some output.
I would like to save this output (serial input of my PC) on a local file.
I found this workaround to do this:

-In the first terminal i type:

 cat -v /dev/ttyACM0 > filename

-In another terminal i type:

 echo -ne 'cat "filename"\n\r' > /dev/ttyACM

It works, but i'd like to automate the process with a single bash script.

./serialDownload.sh filename

I tried to put in background the first command before executing the second one but it doesn't work...

#!/bin/bash 


SERIAL_PORT="/dev/ttyACM0"
BAUDRATE=9600  

stty raw speed $BAUDRATE
./serialListen.sh $1& (->this put in background the first command)
sleep 2
echo -e 'cat "'$1'"\n\r' > $SERIAL_PORT

Thank you in advance for any kind of help!

Improve this question
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  • 1
    duplicate: stackoverflow.com/questions/12990702/… Commented Jan 4, 2017 at 11:15
  • ...it doesn't really fix my problem but it gives me some good hints i have to work on..thank you! Commented Jan 4, 2017 at 12:57
  • Have you tried wait or sleep 1 at the end of the script? Commented Jan 4, 2017 at 14:00
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