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I used a interface block to connect to the oc via a adapter block and then a simple dense cable to the controller via a p2p and it actually through out 1 item but not all of them in lua    

Updated to V1.3

Id check out this tiny library that you can probably fit along with your main program. multithread <- yeehaw

aye, the threading library is part of openos. without installing it, you've got not thread api My solution to your issue would be to put a timeout on computer.pullSignal. If it times, execute the next pending command (if there is one)  

I'm trying to write a script to control a worker drone. This drone will interact with plants on specific coordinates that are being fed to him by mainframe via wireless modem. I've planned to have those commands:
1. Add/remove new coordinates.
2. Print out all registered coordinates.
3. Finish the job, return to charger and wait for further commands. 
4. ... The initial solution included using two threads: a worker thread that executes requested and routine actions and a controller thread that listens for new modem messages, updates drone status and generates responses for the mainframe. The problem is - drones have no access to Thread API. I believe there should be a simple solution for this task but I don't see any suitable way to provide such level of responsiveness without proper threading. Rough example for drone :
  ... thread.waitForAny({   thread.create(function()  -- Worker     while true do       if state == "work" then         for _, pos in pairs(locations) do           moveto(pos)           dostuff()           if state ~= "work" then break end         end       elseif state == "stop" then       sleep(5)       end     end   end),   thread.create(function() -- Controller     while true do       local message = table.pack(computer.pullSignal())       if message[1] == "modem_message" then       local command = serialization.deserialize(message[5])       if command.text == "stop" then       state = "stop"       elseif command.text == "resume" then       state = "work"       end     end }})   I am sure somebody already did this kind of stuff on their server, I just can't come up with anything effective and simple without surpassing the 4KiB threshold. Do you have any suggestions?