Listing 4. Share: service temperature_check.

temperature_check = Service.new("2.5.8.4.1", -- declaration service   function()     return function(temp, threshold, ip)       local tcp = socket.tcp() -- Initialize tcp socket       local host, port = ip, 8888       tcp:connect(host, port)       tcp:send(temp .. ’,’ .. threshold)       local result, status = tcp:receive() -- Get response once       tcp:close() -- Close connection       return result     end   end,   function()     local server = socket.bind("*", 8888)     while true do       local client = server:accept()       local data, err = client:receive()       if not err then         local temp, threshold = data:match("([^,]+),([^,]+)")         temp, threshold = tonumber(temp), tonumber(threshold)         if temp and threshold and temp >= threshold then           client:send("ALERT: Temperature exceeded threshold!")         else           client:send("Temperature is within normal range.")         end       end       client:close() -- Close client connection       -- No break here to allow continuous operation     end   end,   function(temp, threshold)     return temp >= -50 and temp <= 150 and threshold > 0   end ) deviceB = Share.new(Myip) deviceB.attach(temperature_check)