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Grid Redstone.png  Function rednet.broadcast
rednet.send()s a message on channel 65535. Any modem in range readied for rednet use will be able to receive it.

Most data types can be sent, but functions / coroutines are converted to nil. In the past tables were also converted to nil, and required the use of textutils.serialize() to transmit - they can now be sent directly (exact build which changed things is unknown, but CC 1.53 works and 1.5 does not).

ComputerCraft 1.6 introduces optional "protocols" - simple string names indicating what the message is about. Receiving systems may filter messages according to their protocols, thereby automatically ignoring incoming messages which don't specify an identical string. It's also possible to lookup which systems in the area are interested in certain protocols, hence making it easier to determine where given messages should be sent in the first place.
Syntax rednet.broadcast(any message, [string protocol])
Returns None
Part of ComputerCraft
API rednet


Grid paper.png  Example
Sends a message to all nearby systems (assuming a modem is attached and open).

Grid paper.png  Example
Sends a message to all nearby systems, specifying a protocol of "TestMessages".

Grid disk.png Rednet API Functions - rednet.close - rednet.send - rednet.broadcast - rednet.receive - rednet.isOpen - - rednet.unhost - rednet.lookup