The problem is that you can't have multiple computers 'talk' at the same time, or else the messages become garbled.
You can only have one computer at a time send a message over the rednet.
If that's still ok with you, then here a small tutorial:
- Connect at least two computers together via bundled cable.
- To send/receive anything on a computer, you have to open a side for communication first. So type rednet.open( side ) on both first, where 'side' is the side on each computer, where the bundled cable is connected to.
- On the receiving computer, execute (either via Lua interactive interpreter, or via a program) rednet.receive( timeout ), where 'timeout' is the number of seconds the computer will wait for a message to arrive.
- On the sending computer, execute rednet.send( id, message ), where id is the 'id' of the receiver and 'message' is the message you want to send. If the message was sent successfully, rednet.send will return 'true'.
You can also send a broadcast, which will send the message to every computer who listens:
rednet.broadcast( message )There's also an announce feature, which is basically a broadcast with an empty-string message:
rednet.announce()equivalent to
rednet.broadcast( "" )To receive messages you are not limited to
rednet.receive( timeout ).
Alternatively you can listen to the "
rednet_message" event, e.g.:
rednet.open( "back" )
while true do
event, id, message = os.pullEvent()
if event == "rednet_message" then
print( "Message from ID#"..id..":" )
print( message )
end
end
rednet.receive, as well as the "
rednet_message" event will both return the
ID of the sender as well as his
message.
Edit: Forgot the rednet.open( "back ") in the code block.
