{
  "description":"read acceleration of 3-axis",
  "spec": {
    "id": "__HOPE__/demo/makeblock/3axis/read",
    "in": {
      "ports": [{
        "name": "trigger"
        }]
    },
    "out": {
      "ports": [{
          "name": "x",
          "type": "number"
        }, {
          "name": "y",
          "type": "number"
        }, {
          "name": "z",
          "type": "number"
        }]
    }
  }
}