/** * composes the new value of a record definition into a updated set command that can be send back * to heat pump * * @param response of heat pump that should be updated with new value * @param RecordDefinition that shall be used for compose the new value into the heat pump set * command * @param string value to be compose * @return byte[] ready to send to heat pump * @throws StiebelHeatPumpException */ public byte[] composeRecord(String value, byte[] response, RecordDefinition recordDefinition) throws StiebelHeatPumpException { short newValue = 0; if (recordDefinition.getDataType() != Type.Settings) { logger.warn( "The record {} can not be set as it is not a setable value!", recordDefinition.getName()); throw new StiebelHeatPumpException("record is not a setting!"); } double number = Double.parseDouble(value); if (number > recordDefinition.getMax() || number < recordDefinition.getMin()) { logger.warn( "The record {} can not be set to value {} as allowed range is {}<-->{} !", recordDefinition.getName(), value, recordDefinition.getMax(), recordDefinition.getMin()); throw new StiebelHeatPumpException("invalid value !"); } // change response byte to setting command response[1] = SET; // reverse the scale if (recordDefinition.getScale() != 1.0) { number = number / recordDefinition.getScale(); newValue = (short) number; } // set new bit values in a byte if (recordDefinition.getBitPosition() > 0) { byte[] abyte = new byte[] {response[recordDefinition.getPosition()]}; abyte = setBit(abyte, recordDefinition.getBitPosition(), newValue); response[recordDefinition.getPosition()] = abyte[0]; return response; } // create byte values for single and double byte values // and update response switch (recordDefinition.getLength()) { case 1: byte newByteValue = (byte) number; response[recordDefinition.getPosition()] = newByteValue; break; case 2: byte[] newByteValues = shortToByte(newValue); int position = recordDefinition.getPosition(); response[position] = newByteValues[1]; response[position + 1] = newByteValues[0]; break; } response[2] = this.calculateChecksum(response); response = this.addDuplicatedBytes(response); logger.debug( "Updated record {} at position {} to value {}.", recordDefinition.getName(), recordDefinition.getPosition(), value); return response; }