# Firmware Lifecycle

# Change Log

# New Features

  • UCM firmware version 1.5.2 release

# Bug Fixes

  • Fix for OTA does not finish successful without breaker.


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.


Do not power off the device during the firmware update.


Remove Dryer Control Network before updating the firmware.

# Compatibility Matrix

Please carefully check the compatibility matrix for the 1.5.2 firmware version with the previous version.


  • C - fully compatible;
  • NC - not compatible;
  • PC - party compatible, check additional notes.
OTA Upgradable C
Modbus Communication Backward Compatibility C
Configuration C
Rollback C


If Site has Enapter Gateway it needs to be updated to version 1.8.9 or higher.

# Functional Depreciation Statements

  • Warning WS_20 is deprecated. Instead of using it for checking that Electrolyser reached Max Pressure it is recommended to use input register #1200 (4 = Stand-By (Max Pressure)).

# Modbus Compatibility

  • Input registers #14 (Cabinet (Chassis) Serial Number) and #1000 (Stack Serial Number) are deprecated. Instead use holding registers #4026 (Enapter Chassis Serial Number) and #4376 (Enapter Stack Serial Number).

# Known Bugs List

The list below contains the most important problems in the firmware and their solutions.

  • The system stops calculation of total produced H2 after 524288.

    Solution: Update the firmware to version 1.6.0 or above. To update your device, navigate to Device Info -> Firmware and press the Check for Updates button. If you do not see an available update, you can contact our support team at support@enapter.com.