docs: function parseChassisData(statusData) {
          // sample data : 20 00 60 71 or 20 00 60
          var numStr = statusData.replace(/\s/g, '');
          assert.ok(numStr.match(/^[0-9A-Fa-f]{8}$|^[0-9A-Fa-f]{6}$/),
                    "Invalid chassis status output : " + statusData);
          var uidCode = parseInt(numStr[4], 16);
          var powerCode = parseInt(numStr[1], 16);
  
          // UID status need last 2 bit , so use mask 0x3(0011)
          // Power status need last bit , so use mask 0x1(0001)
          return {
              uid: uidStatus[uidCode & 0x3],
              power: (powerCode & 0x1) === 1
          };
      }