function onMessage(client, topic, message)

     if handleQuery(topic.."+"..message) then
          uart.write(0,topic.."+"..message)

          uart.on("data","%", function(data)
             if data=="quit%" then
                 uart.on("data") -- unregister event
             end

             if data ~= "quit%" then
                 client:publish(topic.."/response","REPLY:"..data,0,0)
             end
          end,0)
     else
         client:publish(topic.."/response","REPLY: Invalid query",0,0)
     end
 end

REPLY:<value>%
 quit%