code: function(msg) {
  				msg.addOption(new Option(Message.Option.URI_PATH, new Buffer("c")));
  				msg.addOption(new Option(Message.Option.URI_QUERY, encodedCrc));
  				if (includeIndex) {
  					var idxBin = messages.ToBinary(chunkIndex, "uint16");
  					msg.addOption(new Option(Message.Option.URI_QUERY, idxBin));
  				}
  				return msg;
  			}
docs: logger.log('sendChunk %s, crc hex is %s ', chunkIndex, encodedCrc.toString('hex'), this.getLogInfo());