How to control computers using rednet? 1.7.10

I would like to set up a big computercraft network with one main computer using wireless modems and rednet api. Though I was not able to find any tutorials - all of the tutorials I found were using Craft os 1.6 or lower (I am using 1.7). The wiki was not much help either.

Thank you in advance.

1 Answer

Using 3 basic rednet functions - open(side), broadcast(message, protocol) and receive(protocol, timeout), it is possible to implement this.

Control Computer code:

print('Main Computer')
print(' Enter any command to broadcast to slaves')
rednet.open('top') -- Open modem on top
while true do -- Run this forever io.write('>>> ') command = io.read() -- Read a command from stdin if command == 'exit' then -- If it's exit rednet.close('top') -- Close top modem return -- Exit end rednet.broadcast(command, 'slave') -- Otherwise, broadcast the command with protocol slave
end

Slave code:

rednet.open('top') -- Same, open top
while true do -- Run forever id, data = rednet.receive('slave') -- Receive message under protocol 'slave' print('Received command ' .. data) if data == 'quit' then -- If it's quit rednet.close('top') -- Cleanup, close top modem print('Quitting...') return -- Exit elseif string.match(data, 'math .+') then -- Regex: command starts with math print('Math:') equation = string.match(data, 'math (.+)') -- Regex: get actual equation print(equation .. ' = ' .. loadstring('return ' .. equation)()) -- Eval it. I'm not responsible for attacks. end
end

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