$ perl -e 'system("echo -e "\xFF\x08\x00" >> /dev/ttyACM0");'
Backslash found where operator expected at -e line 1, near ""echo -e "\"
	(Missing operator before \?)
Backslash found where operator expected at -e line 1, near "xFF\"
Backslash found where operator expected at -e line 1, near "x08\"
String found where operator expected at -e line 1, near "x00" >> /dev/ttyACM0""
syntax error at -e line 1, near ""echo -e "\"
Execution of -e aborted due to compilation errors.