# Firmware Lifecycle
# Change Log
- No changes
Make sure you have physical access to the device before starting the update process.
After firmware upgrade the electrolyser must be powered off and turn back on.
# Compatibility Matrix
Please carefully check compatibility matrix for 1.0.1 version of the firmware with other firmwares
- C - fully compatible;
- NC - not compatible;
- PC - party compatible, check additional notes.
|Modbus Communication Backward Compatibility||PC|
# Functionality Deprication Statements
# Modbus Compatibility
- Input Registers #14-#17 are used for ChassisSerialNumber
- System State is stored in Input Register #18