# Firmware Lifecycle

1.5.0 Update Note

In case firmware is updated from 1.5.0 directly to 1.8.1, produced H2 metric will be lost and FP_02 will be raised. It is recommended to follow the upgrade path: 1.5.0 -> 1.6.0 -> 1.7.X -> 1.8.1.


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


Make sure you have physical access to the device before starting the update process.


Do not power off the device during the firmware update.


Remove Dryer Control Network before updating the firmware.

# Change Log

# New Features

  • Support new electrolysers with product codes - ELE2105XXA2LSV03, ELE2105XXA2ASV08 and ELE2105XXA2LSV04.
  • Web GUI's parameters and modbus register naming brighten.
  • Web GUI's syslog configuration dialog reform.

# Bug fixes:

  • Frequent rewriting of configs re-uses file's entiries.
  • Modbus command to dryer does not lock networking.
  • Web GUI's production rate modal fixed.
  • More faster configuration refresh.

# Compatibility Matrix

Please carefully check the compatibility matrix for the 1.8.1 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

# 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)).

  • In case firmware is updated from 1.5.0 directly to 1.8.1 produced H2 will be lost and FP02 will be raised.

# Modbus Compatibility

  • Holding register #6018 is used for Start and Stop the Dryer starting from firmware 1.6.0.

  • 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.

  • There is an issue (opens new window) using WiFi and Windows to access the .local hostname.

    Solution: Use a local ethernet connection to the electrolyser or IP address as a hostname.

  • DCN may assign an IP address to devices (computers, mobiles) connected to Wi-Fi AP associated with DCN enabled Enapter devices.


    • Delete the DCN from the Enapter Mobile App and create it one more time.
    • If it is possible try to separate the DCN from your main network environment by connecting the DCN to another WiFi AP. There is no need to separate one DCN from another.