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Release date: November 5, 2025

CS Relay – v106

A new build is available for our CS Relay, with the following changes since v102:

  • Return 0 for near-zero current measurements
  • Fix issue causing GFD measurements to be off by 1 channel

The update is available here.

Updating stack PCBs like CS Relay is possible through the stack master’s web interface. Download the binary file above, find the Upgrader page under the Stack tab and select the correct stack PCB from the drop-down. Choose the downloaded binary as the upgrade file, and then start the upgrade process.

Note: This release is compatible only with revision M of CS Relay.

Release date: November 5, 2025

Remote IO 1810 – v103

A new build is available for our Remote IO 1810, with the following changes since v102:

  • Restart communication timeout on both reads and writes
  • Fix issue with async communication, to be equal to old firmware
  • Add status view to webapp
  • Add IP filtering functionality to Modbus

The updater is available here.

Release date: November 4, 2025

Ethernet Switch – v18

A new build is available for our Ethernet Switch 8-port, with the following changes since v17:

  • Restart communication timeout on both reads and writes
  • Add IP filtering functionality to Modbus
  • Add ability to upgrade new type of stack PCBs
  • Improve customer updater error handling

The updater is available here.

Release date: June 16, 2025

Ethernet Switch – v17

A new build is available for our Ethernet Switch 8-port, with the following changes since v16:

  • Add link aggregation
  • Add temperatures to webapp
  • Disallow removing VLAN 1 from all ports
  • Indicate missing stack nodes in webapp
  • Fix issue with empty response
  • Fix DHCP server crash
  • Fix webapp favicon


The updater is available here.

Release date: June 11, 2025

Remote IO 1810 – v102

A new build is available for our Remote IO 1810, with the following changes since v100:

  • Fixes various issues with digital counters
  • Fix an issue where counter mode wasn’t stored
  • Fix favicon in webapp
  • Improve network robustness


The updater is available here.

Note: If you’re upgrading from v23 or below, you need to perform a conversion as described in this document before running the v102 updater.

Release date: May 22, 2025

Remote IO 1810 – v100

A new firmware is now available for our Remote IO 1810, v100, which is a complete rebuild of the existing firmware but now based on the same framework we use on most other PCBs. This enables us to share more code between products, and should be a more robust platform for future changes.

To clearly differentiate this version from the old generation, we’ve bumped the version number to v100, and we don’t plan any further changes to the earlier series. v100 has the same Modbus register interface as the current firmware, and should hence be fully backwards compatible.

These are the main features of the new firmware:

  • New web interface
  • All settings available in the web interface
  • Ability to control outputs and show live inputs in web interface
  • Same Modbus register interface as the current firmware
  • Support for customer updaters to make future upgrades easier
  • Based on Zephyr RTOS


If you’re upgrading from v23 or below, you need to perform a conversion as described in this document. The updater itself is available here.

Release date: April 19, 2025

Pulse Transceiver – v2

A new build is available for our Pulse Transceiver, with the following changes since v1:

  • PTP synchronization improvements
  • Fix PTP master selection issue
  • Fix network failure after configuration save
  • Fix Save button when webapp window is small

The updater is available here.

Release date: February 18, 2025

Subsea Display – v21

A new build is available for our Subsea Display, with the following changes since v20:

  • Fix webapp screen configuration
  • Fix bugs when POSTing new text
  • Further improvements to wifi robustness
  • Add wifi firmware version to /api/about
  • Add support for putting wifi module in bootloader

The updater is available here.

Release date: February 7, 2025

Subsea Display – v20

A new build is available for our Subsea Display, with the following changes since v19:

  • Change web interface to use webapp
  • Allow using colors in prefix and unit
  • Show error on display and in webapp if SD card isn’t found on boot
  • Improve wifi robustness
  • Upgrade to Zephyr v3.7

The updater is available here.

Release date: February 5, 2025

Ethernet Switch – v16

A new build is available for our Ethernet Switch 8-port, with the following changes since v15:

  • Add Host overview, showing which devices are connected to which port
  • Add DHCP server with port bind function
  • Add FINS support
  • Added Mbps to status page
  • stack: Add ability to clear nodelist without factory reset to webapp
  • stack: Add dummy node to stack from webapp and Modbus
  • stack: Add ability to set node ID for duplicate nodes from webapp
  • stack: Use type 0 for invalid nodes, like the Legacy Switch
  • stack: Update status continuously
  • Remove unusable speed configuration for SFP ports
  • Visual tweaks to the webapp – toggle switch, radio buttons, style
  • Upgrade Zephyr to v3.7
  • Improve network robustness
  • Various minor bug fixes and improvements

The updater is available here.