code: function isValid(message) {
    if (!Constants.equals(message.slice(4, 16))) return false;
  
    var checksum = message.readUInt16BE(message.length - 2);
  
    return checksum === crc(message.slice(16, -2));
  }
docs: Check if buffer is valid Smart Bus command
  
  @param  {Buffer} message
  @return {Boolean}