The Chat Box lets you send and receive chat messages. By default, the maximum distance for both is 40 blocks away from the peripheral - can be changed in config.
Recipe
API
Computers
say(message) - says a message within the chatbox distance.
(0.3.0+) getDistance() - gets the current listening/speaking distance.
(0.3.0+) setDistance() - sets the current listening/speaking distance. The maximum is defined in the config.
An event is sent every time the Chat Box receives a message. The name of the event is “chat_message”, the first parameter is the username and the second parameter is the message.
Redstone
Since Computronics 0.6.0, a 4-tick redstone pulse is sent every time the Chat Box receives a message.