linux - BeagleBone Black UART1 enabled, but does not send or receive data -


i have (finally) managed uart1 going on bbb using instructions here:

http://tenderlovemaking.com/2014/01/19/enabling-ttyo1-on-beaglebone.html

doing ls -la /dev/ttyo* gives

crw--w---- 1 root tty     248, 0 sep 22 14:50 /dev/ttyo0 crw-rw---- 1 root dialout 248, 1 sep 22 14:50 /dev/ttyo1

but cannot seem write or read anything.

echo "wibble" > /dev/ttyo1

does nothing (i ran screen /dev/ttyo1 115200 in terminal window). there further step data flowing through serial port?

note: beaglebone revision b6.


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