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Detect an Empty Hopper in MC 1.12.2


How to power a row of droppers efficiently from side or bottom?Minecraft Command Blocks Help - Selecting previous target in a second command blockAll items not removed from brewing stand in automated brewing systemHow can I make the redstone repeat a task x times and reset it self?How can I receive a success output signal from command block on a fill clock?Command Block always activates ComparatorHow to replace a SPECIFIC item in a players hotbar with another specific itemTesting for players in particlesBurnt-Out Redstone Torches Re-Ignites RandomlyTestfor items in hopper 1.12.2!






.everyoneloves__top-leaderboard:empty,.everyoneloves__mid-leaderboard:empty,.everyoneloves__bot-mid-leaderboard:empty margin-bottom:0;








1















I'd like to use a command block to detect when the first slot of a hopper has no items in it in 1.12.2 (Or alternatively, if no slots have items in them). I already know how to search for a specific item in the first slot:




/testforblock ~a ~b ~c hopper -1 Items:[id:"minecraft:dirt",Count:1b,Slot:0b]




I've tried to search for minecraft:air as a way to detect nothing, but this doesn't seem to work. Any help is appreciated! It must be a command block solution (I know that you can detect an empty hopper "manually" by having a comparator output with redstone torch, but in my scenario the hopper and signal destination (command block location) are very far apart)










share|improve this question




























    1















    I'd like to use a command block to detect when the first slot of a hopper has no items in it in 1.12.2 (Or alternatively, if no slots have items in them). I already know how to search for a specific item in the first slot:




    /testforblock ~a ~b ~c hopper -1 Items:[id:"minecraft:dirt",Count:1b,Slot:0b]




    I've tried to search for minecraft:air as a way to detect nothing, but this doesn't seem to work. Any help is appreciated! It must be a command block solution (I know that you can detect an empty hopper "manually" by having a comparator output with redstone torch, but in my scenario the hopper and signal destination (command block location) are very far apart)










    share|improve this question
























      1












      1








      1








      I'd like to use a command block to detect when the first slot of a hopper has no items in it in 1.12.2 (Or alternatively, if no slots have items in them). I already know how to search for a specific item in the first slot:




      /testforblock ~a ~b ~c hopper -1 Items:[id:"minecraft:dirt",Count:1b,Slot:0b]




      I've tried to search for minecraft:air as a way to detect nothing, but this doesn't seem to work. Any help is appreciated! It must be a command block solution (I know that you can detect an empty hopper "manually" by having a comparator output with redstone torch, but in my scenario the hopper and signal destination (command block location) are very far apart)










      share|improve this question














      I'd like to use a command block to detect when the first slot of a hopper has no items in it in 1.12.2 (Or alternatively, if no slots have items in them). I already know how to search for a specific item in the first slot:




      /testforblock ~a ~b ~c hopper -1 Items:[id:"minecraft:dirt",Count:1b,Slot:0b]




      I've tried to search for minecraft:air as a way to detect nothing, but this doesn't seem to work. Any help is appreciated! It must be a command block solution (I know that you can detect an empty hopper "manually" by having a comparator output with redstone torch, but in my scenario the hopper and signal destination (command block location) are very far apart)







      minecraft minecraft-commands






      share|improve this question













      share|improve this question











      share|improve this question




      share|improve this question










      asked Apr 26 at 15:38









      AndrewAndrew

      256




      256




















          1 Answer
          1






          active

          oldest

          votes


















          3














          In Minecraft 1.12.2, you can detect a hopper with no items in it with the command:



          /testforblock <x> <y> <z> hopper -1 Items:[]


          in one command block, followed by a conditional chain command block to do something when this is true.






          share|improve this answer























          • Wow I seriously overthought that... thank you!

            – Andrew
            Apr 26 at 17:58











          Your Answer








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          1 Answer
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          1 Answer
          1






          active

          oldest

          votes









          active

          oldest

          votes






          active

          oldest

          votes









          3














          In Minecraft 1.12.2, you can detect a hopper with no items in it with the command:



          /testforblock <x> <y> <z> hopper -1 Items:[]


          in one command block, followed by a conditional chain command block to do something when this is true.






          share|improve this answer























          • Wow I seriously overthought that... thank you!

            – Andrew
            Apr 26 at 17:58















          3














          In Minecraft 1.12.2, you can detect a hopper with no items in it with the command:



          /testforblock <x> <y> <z> hopper -1 Items:[]


          in one command block, followed by a conditional chain command block to do something when this is true.






          share|improve this answer























          • Wow I seriously overthought that... thank you!

            – Andrew
            Apr 26 at 17:58













          3












          3








          3







          In Minecraft 1.12.2, you can detect a hopper with no items in it with the command:



          /testforblock <x> <y> <z> hopper -1 Items:[]


          in one command block, followed by a conditional chain command block to do something when this is true.






          share|improve this answer













          In Minecraft 1.12.2, you can detect a hopper with no items in it with the command:



          /testforblock <x> <y> <z> hopper -1 Items:[]


          in one command block, followed by a conditional chain command block to do something when this is true.







          share|improve this answer












          share|improve this answer



          share|improve this answer










          answered Apr 26 at 17:41









          Jack L.Jack L.

          662




          662












          • Wow I seriously overthought that... thank you!

            – Andrew
            Apr 26 at 17:58

















          • Wow I seriously overthought that... thank you!

            – Andrew
            Apr 26 at 17:58
















          Wow I seriously overthought that... thank you!

          – Andrew
          Apr 26 at 17:58





          Wow I seriously overthought that... thank you!

          – Andrew
          Apr 26 at 17:58

















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