use buspirate v2.go to figure out at which baud rate a UART device talking AT commands communicates

bp_scan_uart_baud.sh

#!/bin/sh
# use buspirate v2.go to figure out at which baud rate a UART device talking AT commands communicates
# 2015 hadez@infuanfu.de
# device is powercycled for each try
 
DEV=/dev/ttyUSB0
 
echo "#" >$DEV #reset
sleep 1
for baud in 1 2 3 4 5 6 7 8 9; do
	echo "m 3 $baud 1 1 1 2" >$DEV; sleep 0.1
	for newline in "0x0d 0x0a" "0x0a"; do
		echo "W" >$DEV; sleep 0.1
		echo "{" >$DEV; sleep 2 # enter live read; wait for powerup
		echo "\"AT\" $newline" >$DEV; sleep 2
		echo "}" >$DEV; sleep 0.1
		echo "w" >$DEV; sleep 0.5
	done
done