# Firmware Lifecycle
It is recommended to update the device in the IDLE mode without receiving and executing any commands from Modbus, Enapter Cloud, Enapter Mobile App, EL 2.1 Web GUI or others.
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.
If Site has Enapter Gateway it needs to be updated to version 1.8.9 or higher.
# Change Log
# New Features
UCM firmware version 1.6.1 release.
Water min pressure monitoring.
# Bug Fixes
Changed check period for membrane failure.
# Compatibility Matrix
Please carefully check the compatibility matrix for the 1.6.1 firmware version with the previous version.
- C - fully compatible;
- NC - not compatible;
- PC - party compatible, check additional notes.
|Modbus Communication Backward Compatibility||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)).
# 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
Solution: Use a local ethernet connection to the electrolyser or IP address as a hostname.
If the WiFi router power cut happens for a very short period it is possible that one of the devices connected to the MESH network won't be able to connect to the cloud and will have the offline status.
Solution: To resolve the issue you will need to manually reboot the device. This issue will be fixed in future FW releases.