Prolite LED Sign Documentation
The sign is meant to be used as an output device by the MCP. It is useful
for debugging, displaying the robot's current state, or printing out status
messages from various subsystems.
The server will take a UDP message and display it on the LED sign. The sign requires 12 volts and a serial connection.
3. Main Discussion
The sign can display 13 characters at a time. It can be supplied with a 12 volt power source
and seems to be bugging. Sometimes on power-on, just a few leds will light up and nothing
else will happen. In this case, just power cycle it.
The computer communicates with the sign via the serial port. Information about the
communication protocol can be found here along with other information about the
The server is very simple. It uses the udpserver library to handle communications. A regular
expression parser checks any incoming message for validity, and will then reformat the
message into Prolite's protocol before writing it out to the serial port.
A udp server exists at port 9000 (at present). A string message should be sent to port 9000 via udp
in the following format:
Code listing 4.1
print: Just a normal message.
Code listing 4.2
error: Something bad happened!
Any message prefixed with "print: " will be displayed in green. Any message prefixed with "error: "
will be displayed in red. All other messages will be ignored.
6. To-Do List
It would be nice to add some more commands for different
colors and perhaps other features, such as date/time,
stopwatch, countdown, etc.