change buttons to email, connect and print (as images show)
[linux-gpio-pinout] / pins /
drwxr-xr-x   ..
-rw-r--r-- 2391 Cubietech Cubieboard.txt
-rw-r--r-- 545 Lamobo R1.txt
-rw-r--r-- 2344 Pine64-pins.txt
-rw-r--r-- 654 Raspberry Pi,txt