How to Set Up a Wired Modem Network with Computers

Crafting and Placing the Parts

Place a Computer or Advanced Computer where you want your main machine. Craft a Wired Modem and a Networking Cable. Attach the Wired Modem to the Computer by placing it against the computer block. Run Networking Cable from the modem to each additional Computer, Advanced Computer, or Turtle you want on the same network. Each machine that needs to talk on the network needs its own Wired Modem attached, with Networking Cable linking the modems together.

Opening and Testing the Network

Right-click the Computer to open its terminal. On each machine, open the modem peripheral and call modem.open(1) to listen on a channel. From one computer, send a message with modem.transmit(1, 1, "hello"). The receiving computer reads it with os.pullEvent("modem_message"). If nothing arrives, check that every modem is attached directly to a block and that Networking Cable connects modem to modem without gaps. Wired Modem connections only reach machines on the same cable run.

Adding Wireless

For machines you cannot cable, attach a Wireless Modem instead. Wireless Modem sends and receives over the air on the same channel numbers, so a wired and wireless machine can share a channel. Use Ender Modem when you need cross-dimension range. Keep channel numbers consistent across every machine on the network.