Rednet API

 Note: This function call requires a Modem peripheral to be attached to the computer. See Networking for more information.

 Note: Rednet is not secure against interception or spoofing. See Network security#Rednet for more information.

Functionrednet.broadcast
Broadcasts a string message over the predefined rednet.CHANNEL_BROADCAST channel (default 65535), assuming rednet has been opened. The message will be received by every device listening to rednet.  Note: This function call requires a Modem peripheral to be attached to the computer. See Networking for more information.  Note: Rednet is not secure against interception or spoofing. See Network security#Rednet for more information.
Syntax	rednet.broadcast( message : any protocol? : string )
Returns	nil
Part of	CC:Tweaked (source)
API	rednet
ExampleBroadcast a 'Ping' message over rednet. Broadcasts 'Ping' over the defined rednet.CHANNEL_BROADCAST channel. Code <nowiki> rednet.broadcast('Ping') </nowiki> Output Users running rednet.receive will now have received 'Ping' in their programs.

Functionrednet.close
Closes rednet on the modem attached to side.  Note: This function call requires a Modem peripheral to be attached to the computer. See Networking for more information.  Note: Rednet is not secure against interception or spoofing. See Network security#Rednet for more information.
Syntax	rednet.close( side : string )
Returns	nil
Part of	CC:Tweaked (source)
API	rednet
See also	rednet.open
ExampleClose the top modem. If rednet is open on the top modem on the computer, this will close it. Code <nowiki> rednet.close("top") </nowiki> Output Rednet events will no longer trigger on the top modem.

Rednet.host

Functionrednet.isOpen
Checks if a modem is open on Rednet. channel must be a Modem or side, like “modem_1234” or “top”
Syntax	rednet.isOpen( Modem : string )
Returns	boolean open
Part of	CC:Tweaked (source)
API	rednet
ExampleCheck if modem_1234 is open Check if modem_1234 is open. Code <nowiki> local modem = peripheral.wrap("modem_1234") print(rednet.isOpen(modem)) </nowiki> Output true

Rednet.lookup

Functionrednet.open
Opens rednet on the modem attached to side.  Note: This function call requires a Modem peripheral to be attached to the computer. See Networking for more information.  Note: Rednet is not secure against interception or spoofing. See Network security#Rednet for more information.
Syntax	rednet.open( side : string )
Returns	nil
Part of	CC:Tweaked (source)
API	rednet
See also	rednet.close
ExampleOpen the top modem. Opens rednet on the top modem of the computer. Code <nowiki> rednet.open("top") </nowiki> Output Rednet events will now trigger on the top modem.
ExampleOpen all connected modems This is a little trick using peripheral.find. It accepts a function as the second argument, which is called for each matching peripheral. By using rednet.open here, every connected modem is opened. Code <nowiki> peripheral.find("modem", rednet.open) </nowiki>

Functionrednet.receive
Waits for a Rednet message to be received by an opened modem, or until timeout seconds elapse. Takes another optional parameter, which limits messages able to be received to those broadcasted or sent with a matching protocol.  Note: This function call requires a Modem peripheral to be attached to the computer. See Networking for more information.  Note: Rednet is not secure against interception or spoofing. See Network security#Rednet for more information.
Syntax	rednet.receive( protocol? : string timeout? : number )
Returns	number senderID, any message, string protocol
Part of	Rednet API (source)
API	rednet
ExampleReceive any message with no timeout Since we have no arguments, rednet.receive will wait for the next message from any protocol. If a rednet message was received with the text "Hello world!", the the output would be as follows: Code <nowiki> local id, message, protocol = rednet.receive() print(message) </nowiki> Output "Hello world!"
ExampleReceive any message with a timeout Since we have our timeout specified, rednet.receive will wait for the next message from any protocol, or until the timeout is up. If a rednet message was received with the text "Now there's a timeout!" before the timeout is up, the the output would be as follows: Code <nowiki> local id, message, protocol = rednet.receive(30) print(message) </nowiki> Output "Now there's a timeout!"
ExampleReceive messages of a certain protocol with a timeout Since we have our timeout and protocol specified, rednet.receive will wait for the next message from a specific protocol, or until the timeout is up. If a rednet message was received with the text "Now there's a protocol!" and protocol "ComputerCraft" before the timeout is up, the the output would be as follows: Code <nowiki> local id, message, protocol = rednet.receive("ComputerCraft", 30) print(message) </nowiki> Output "Now there's a protocol!"

Rednet.run

Functionrednet.send
Sends a Rednet message to be received by a specific computer (whose id is id.) Takes another optional parameter, protocol, which specifies what the message is for. It returns false if the message was unable to be sent, but true if it was sent. Make sure your modem is opened with rednet.open!  Note: This function call requires a Modem peripheral to be attached to the computer. See Networking for more information.  Note: Rednet is not secure against interception or spoofing. See Network security#Rednet for more information.
Syntax	rednet.send( id : number message : any protocol? : string )
Returns	bool success
Part of	Rednet API (source)
API	rednet
ExampleSend a message to a computer We send a message to the computer whose id is 567. If the message could be sent, we should see an output of true: Code <nowiki> print(rednet.send(567, "Hello world!")) </nowiki> Output true
ExampleSend a message to a computer with a protocol We now send a message to the computer whose id is 890, with a protocol of "ComputerCraft". If it was sent, we will see a true output: Code <nowiki> print(rednet.send(890, "Hello world!", "ComputerCraft")) </nowiki> Output true

Rednet.unhost