MineCase/data/minecraft/recipes/piston.json

{
  "type": "minecraft:crafting_shaped",
  "pattern": [
    "TTT",
    "#X#",
    "#R#"
  ],
  "key": {
    "R": {
      "item": "minecraft:redstone"
    },
    "#": {
      "item": "minecraft:cobblestone"
    },
    "T": {
      "tag": "minecraft:planks"
    },
    "X": {
      "item": "minecraft:iron_ingot"
    }
  },
  "result": {
    "item": "minecraft:piston"
  }
}