Loop Rednet

Hello everyone,

I've been trying to make a loop in a program, I want it to wait that my main computer sends the message "true" on protocol "tickets" and if it's the case, power up some redstone.

Here's the code :

while true do
  if rednet.isOpen() == false then
	rednet.open("top")
  end
  local senderId, message, protocol = rednet.receive("tickets")
  if message == "true" then
	redstone.setOutput("back", true)
	os.sleep(0.5)
	redstone.setOutput("back", false)
  end
end

Thank you for your help! :D/>

Moved to Ask a Pro.

What exactly is the problem?

Are you sending the message like this:

rednet.send(id, "true", "tickets")

or like this:

rednet.send(id, true, "tickets")

if it's the latter you need to remove the quotes around true in your if statement.