Changes
/* JSON data example */
<pre>
To delete default text (as root):
echo "'{\"action\": \"delete\",\"id\":0}" ' > /dev/ttyACM0
</pre>
<pre>
To insert text (as root)
echo "'{\"action\": \"insert\",\"id\":1,\"text\": \"server1.domain.ch\",\"position_x\": 1,\"position_y\": 1,\"position_lenght\": 127,\"scroll_speed\": 20,\"scroll_index\":0,\"red\": 3,\"green\": 0,\"blue\": 1}" ' > /dev/ttyACM0
</pre>
