ComputerCraft Wiki - User contributions [en]

Receiving a rednet message through os.pullEvent()

2012-12-03T05:09:32Z

MechaTallon: /* Explanation */

The following method is a good method of receiving a rednet message without using rednet.receive().
It is usually used in IRC, Chat programs e.t.c.
When a message arrives to a computer, a "rednet_message" event occurs.
== The Code ==
This is a typical Listener which prints the content and the sender id of any incoming message.
for n,m in ipairs(rs.getSides()) do rednet.open(m) end -- Opens all rednet sides.
while true do
event, id, text = os.pullEvent()
if event == "rednet_message" then
print(id .. "> " .. text)
end
end

== Explanation ==
for n,m in ipairs(rs.getSides()) do rednet.open(m) end
Here we just open all sides for rednet processing.

while true do
We start a loop because os.pullEvent() terminates itself after 10 seconds.

event, id, text = os.pullEvent()
We wait for an event to occur and when this happens, we store the event's info into 3 variables.
NOTE: You can give your variables whichever name you want.

if event == "rednet_message" then
We check if the event was a rednet message.

print(id .. "> " .. text)
We print the message and the id of the sender.

end
end
We close our previous statements.

[[Category:Programs]][[Category:Tutorials]]

Receiving a rednet message through os.pullEvent()

2012-12-03T05:08:47Z

MechaTallon: /* The Code */ - Gave a bit more sophisticated code for this...

The following method is a good method of receiving a rednet message without using rednet.receive().
It is usually used in IRC, Chat programs e.t.c.
When a message arrives to a computer, a "rednet_message" event occurs.
== The Code ==
This is a typical Listener which prints the content and the sender id of any incoming message.
for n,m in ipairs(rs.getSides()) do rednet.open(m) end -- Opens all rednet sides.
while true do
event, id, text = os.pullEvent()
if event == "rednet_message" then
print(id .. "> " .. text)
end
end

== Explanation ==
rednet.open("Direction_of_modem")
Here we just open the modem.

while true do
We start a loop because os.pullEvent() terminates itself after 10 seconds.

event, id, text = os.pullEvent()
We wait for an event to occur and when this happens, we store the event's info into 3 variables.
NOTE: You can give your variables whichever name you want.

if event == "rednet_message" then
We check if the event was a rednet message.

print(id .. "> " .. text)
We print the message and the id of the sender.

end
end
We close our previous statements.

[[Category:Programs]][[Category:Tutorials]]

Rednet.isOpen

2012-12-03T05:02:32Z

MechaTallon:

{{lowercase}}
{{Function
|name=rednet.isOpen
|args=[[string]] side
|returns=[[boolean_(type)|boolean]] isOpen, if the side has rednet opened it returns true, else false.
|api=rednet
|addon=ComputerCraft
|desc=Checks to see if the side has rednet opened.
|examples=
{{Example
|desc=Checks if any side is opened, if so then tell the user.
|code=for n,m in ipairs(rs.getSides()) do if rednet.isOpen(m) then print(m.." is open!") else print(m.." isn't open!") end end
}}
}}

[[Category:API_Functions]]

Rednet.isOpen

2012-12-03T05:01:56Z

MechaTallon: Added new page for the rednet API, may need revising.