const buffer = new ArrayBuffer(1)
const dataView = new DataView(buffer)
dataView.setUint8(0, 0)

wx.startHCE({
  success (res) {
    wx.onHCEMessage(function(res) {
      if (res.messageType === 1) {
        wx.sendHCEMessage({data: buffer})
      }
    })
  }
})