2.5.111

Released: April 16, 2026

New Features

Added support for custom function actions used by supported integrations.
Updated API version to 1.2.
Added CMP command-line support.
Added periodic system, network, and cloud health telemetry.
Added additional reboot commands for support and automation workflows.
Added memory diagnostic and probing endpoints for troubleshooting.

Cloud And Connectivity Improvements

Improved cloud startup reliability
Improved cloud logging during startup, provisioning, connection, retry, and failure handling.
Improved synCloud redirect handling
Improved cloud authorization behavior

Fixes And Stability

Fixed an issue where outlets could be missing after startup or reset.
Fixed network handling when hostname or FQDN values contain spaces.
Reduced monitoring memory usage.
Reduced noisy logging.
Removed unused UI statistics from the memory debug.

2.5.107

Released: January 22, 2026

New features and improvements

Upgrade SSH server on PDUs to support newer host key algorithms
802.1q VLAN Support
Static PDU Routes
MTR, traceroute utilities
Cloud login retention through factory reset
Cloud alert and notification improvement
Global reboot flag raised to 15 second. Report reboot time in GUI
Default autoping interval and timeout to 5 seconds
CLI prompt uses device name
Enhanced diagnostics logging stats
Add AD option in LDAP
Improve LDAP TLS Handshake
Harden reboot command handling.
Error handling when uploading CA certs and keys.
Allow deletion of ca cert and keys
Enhance secondary network interface interaction with VLAN and Wan Health Daemon

Fixes

Global reboot time not showing

2.5.103

Released: September 5, 2025

New features and improvements

Smart Hub digital input event handling improvements
Enhanced diagnostics logging stats

Fixes

Front end UI fix for Leak Detection Usecase

2.5.102

Released: May 12, 2025

New features and improvements

Support added for on-premises Synaccess Central Management Portal
More comprehensive data logging for CMP
Improvements for CMP integration

2.5.98

Released: February 17, 2025

New features and improvements

Internal OS enhancements
RADIUS now functional in bridged mode
LTE functionality improvements

Fixes

IPv6 disabled by default for compatibility and security

2.5.96

Released: January 18, 2025

New features and improvements

Security hardening
Improved internal diagnostic logging

2.5.95

Released: January 18, 2025

New features and improvements

Internal OS enhancements
Auto-ping functionality now working in bridged mode

2.5.94

Released: January 6, 2025

New features and improvements

IPv6 support added
Syslog TCP encryption added
Self-hosted Synaccess Portal functionality added
Security enhancements
CLI and shell improvements

2.5.93

Released: November 21, 2024

New features and improvements

Internal OS improvements
Additional endpoints to clear monthly kWh logs

2.5.90

Released: October 31, 2024

New features and improvements

Configuration API enhancements

Fixes

Bug fixes for networking bridged mode
Various system stability fixes

2.5.88

Released: August 21, 2024

New features and improvements

Improvements to NTP usage
Improvements to controller reboot behavior
Improvements to cloud pairing behavior

Fixes

Leak detection bug fix for improper characters

2.5.87

Released: July 31, 2024

New features and improvements

Security improvements for multiple networking protocols

2.5.86

Released: July 17, 2024

New features and improvements

Additional sensor port options and configurations

Fixes

Bug fix for web POST HTTP actions for sensor data

2.5.83

Released: July 9, 2024

Fixes

SMTP header formatting updated to conform to RFC requirements

2.5.81

Released: May 6, 2024

Fixes

Outlet state setting bug fix
Default gateway configuration bug fix
Firmware update reboot hang fix

2.5.80

Released: April 29, 2024

New features and improvements

Ability to globally enable or disable event monitoring based on time and day
Security patches
Additional validation for user inputs, blocking disallowed special characters
Auto-ping now defaults to the primary network interface
Netbooter CLI support

Fixes

Fix for device power-up hang issue
Fix for system resource leaks

2.5.79

Released: March 6, 2024

New features and improvements

Override DNS DHCP option added
Added “time executed” field for triggered events
Added “counter since event triggered”
Performance enhancements

Fixes

LCD display bug fix on three-phase models
Outlet CLI help section fix

2.5.75

Released: December 12, 2023

New features and improvements

Smart hub support
PAT support when updating firmware
Enhanced security for multiple temperature sensors per port
Stricter password requirements
Web page auto logout when idle
Password expiration
Account lockout after repeated unsuccessful login attempts
Manual lock and unlock controls for user accounts
USB port can be configured as COM mode
Auto login in serial console
Device name displayed in web app sidebar
Device name included in email alerts

Fixes

DHCP gateway reporting fix in bridged mode
Temperature sensor LCD reporting fix

2.5.73

Released: November 7, 2023

New features and improvements

Option to disable TLS versions lower than TLS 1.2 (enabled by default)

2.5.72

Released: November 2, 2023

New features and improvements

SNMP OIDs added for event trigger state and event trigger time

2.5.71

Released: October 23, 2023

Fixes

Bug fix for networking configuration changes

2.5.68

Released: October 10, 2023

New features and improvements

Security update for additional security protocols

2.5.67

Released: October 9, 2023

New features and improvements

DNS nameservers now supplied by DHCP
Security update for cloud connectivity

2.5.66

Released: August 18, 2023

New features and improvements

Power readings added for 120 V / 208 V PDU models

Fixes

Sensor connectivity bug fix

2.5.64

Released: June 13, 2023

New features and improvements

Error reporting added when cloud pairing fails
Support added for inlet plug IEC 60309 316P6

2.5.62

Released: June 8, 2023

Fixes

Fixed non-responsive behavior when incorrect credentials are used during login

2.5.61

Released: April 6, 2023

New features and improvements

Support added for 120/208 V three-phase PDUs
Factory reset and control module pairing process updated

2.5.60

Released: March 21, 2023

New features and improvements

Support added for a new triple-circuit/input 36-outlet PDU
Reduced redundant logging

2.5.58

Released: March 16, 2023

New features and improvements

Cloud support added (disabled by default)
RADIUS remote authentication support added
HTTPS POST action support added
Quad circuit support added
Control module re-pair behavior improved

2.5.57

Released: December 6, 2022

Fixes

Gateway IP display fix on LCD screen
Networking issues fixed for select routes with multiple network interfaces

2.5.55

Released: September 13, 2022

New features and improvements

Support added for quad-circuit configuration PDUs
Support added for WYE three-phase PDU configurations

2.5.51

Released: July 5, 2022

New features and improvements

LDAP remote authentication added
LDAP configuration testing tool added
30-minute timeout added for the web interface
Outlet grouping added
Navigation improved for selected configuration pages

2.5.49

Released: May 18, 2022

New features and improvements

Weekly event triggers added
Mining OS only: Slush API passthrough update
(contact us directly for Mining OS firmware)

Fixes

x-axis mislabeling fix on line charts
Bug fix when flushing logging data

2.5.48

Released: April 21, 2022

New features and improvements

Monthly kWh consumption tracking added
“Reset kWh” action added for automation
Monthly event triggers added
Secondary and backup network interface support added via USB–Ethernet dongle
IP access control added for cellular code bases only
Mining OS only: preset mining events, miner API passthrough, and Bitcoin exchange rate LCD behavior
(contact us directly for Mining OS firmware)

2.5.47

Released: March 9, 2022

New features and improvements

Support added for SynLink Switched modules
Current RMS reporting added

2.5.45

Released: May 18, 2022

Fixes

SNMP sysLocation and sysContact field bug fix

2.5.41

Released: March 2, 2022

New features and improvements

sysContact, sysName, and sysLocation fields added on web interface for SNMP

2.5.40

Released: February 16, 2022

Fixes

Fixed SNMP not reporting beyond IP address when booting after factory reset
Fixed apparent power reporting for each outlet in SNMP

2.5.38

Released: February 16, 2022

New features and improvements

Replaced watts as unit of measurement with apparent power

2.5.37

Released: January 31, 2022

New features and improvements

Faster auto-ping interval and auto-ping timeout options
Power measurements added to outlet API

2.5.36

Released: January 26, 2022

New features and improvements

Configuration backup and restore functionality added
Ethernet passthrough Realtek r8512 driver added
SSL keys and certificates regenerated more frequently
SSL certificate validity extended to 20 years
Outlet info screensaver added
“Mini leaf” for Banyan support added
Bitcoin screensaver added
SMS command “outlet status all” added
Action added to trigger other PDUs

Fixes

NTP drift error fix

2.5.33

Released: December 10, 2021

New features and improvements

Ability added to use outlet relay as an action
Ability added to use outlet index to modify outlet state or configuration instead of outlet UUID

Fixes

Fix for bankCurrentRms not updating for banks 2, 3, and higher via SNMP
Fix for erroneous inlet line current RMS in SNMP

2.5.31

Released: November 5, 2021

New features and improvements

SNMPv3 trap settings configuration added
SNMPv3 enable and snmp_port configuration added
SNMPv3 settings added on users
SNMPv3 trap action added
SNMPv3 authentication role permissions added

2.5.30

Released: October 18, 2021

Fixes

Horizontal LCD screensaver fix for three-phase PDUs

2.5.29

Released: October 15, 2021

New features and improvements

Circuit breaker type selection updated to Single Pole / Double Pole

2.5.28

Released: October 8, 2021

New features and improvements

ATS added to warning events on the frontend

2.5.6

Released: July 14, 2021

New features and improvements

Flag added to hide logs for outlet switching
Syslog format reverted to traditional
Enable or disable switch added for outlet switching logs
Outlet action section renamed in system outlet item page
User activity logs in overview page reordered

Fixes

Flush logs notification message fix
Graceful shutdown button renamed

2.5.5

Released: July 7, 2021

New features and improvements

CLI keywords for outlet set commands updated
Ability added to change global reboot time via CLI
WebSocket event history trigger states added
Graceful shutdown command renamed on web interface
Help menu added for LCD settings
Batch operation on web interface skips outlets already in intended state and informs users when all are already switched
Type field removed in CLI settings port set
portAExpansionPwrShare settings hidden

Fixes

Validation fixes for global reboot time
Factory reset bug fix for pwrOnState not resetting

2.5.4

Released: July 2, 2021

New features and improvements

Batch operation for outlet switching added on web interface
Help icons added throughout web interface next to inputs and data rows
“Pending reboot” status added to outlet sections when rebooting
USB firmware update section added on web interface
Data fetch behavior improved when components mount
JSON commands separated for CLI
Example sections added to CLI IP configuration
Help menus reworded for clarity in CLI
USB firmware update functionality added

2.5.3

Released: June 30, 2021

Fixes

Error message fix for PUT /api/inlet web API for inlet energy accumulation

2.5.2

Released: June 29, 2021

New features and improvements

Ping command added to CLI
“Last updated” coloring added on web interface
Firmware version shown in side header of web interface
HTTPS redirect disabled when HTTP is disabled
Data reloads improved on frontend navigation changes

2.5.1

Released: June 24, 2021

New features and improvements

Warning label added on frontend for IP and web changes

Fixes

Fix for issue when clearing logs; user is prompted
Fix for user initialization issue with SSH keys

2.5.0

Released: June 24, 2021

New features and improvements

Factory reset now resets power-up state and energy accumulation
Factory reset now clears log files
Default action created for SynLink Switched and Switched Pro+ during reset
Test ping command added
Invalid hosts allowed for auto-ping triggers
Trigger state added to event trigger object
Limits added for number of groups, actions, events, and SSH keys
Proper error responses when reaching maximum counts or violating uniqueness constraints
Example commands added in CLI
Telnet disabled by default
Output relay model support added in CLI and HTTP
Session cookie expiration changed to 24 hours

2.4.3

Released: June 9, 2021

Fixes

Telnet module issues fixed

2.4.1

Released: June 8, 2021

New features and improvements

Warning messages added when changing SSH, IP, or web settings
Password static text type added for web interface
SSH session now resets when SSH settings change

2.4.0

Released: June 4, 2021

New features and improvements

Ability to set time manually added
Polyfill added to support more legacy browsers on frontend
Personal access token functionality added for web API
Diagnostics info page added
System logs added for changes to settings, outlets, banks, groups, and inlets
Button added for graceful shutdown

Fixes

Bugs fixed when deleting SSH keys from web interface

2.3.1

Released: May 17, 2021

New features and improvements

Permissions added for additional shell commands
Configuration issues resolved for outlet settings on web interface

2.3.0

Released: May 13, 2021

New features and improvements

Logging page added for event trigger logging, internal logging, and user logging in web API and web interface
Groups functionality added to CLI
Ability to configure ports and display them in CLI added

2.2.2

Released: April 21, 2021

New features and improvements

User role permission checking enforced in CLI

Fixes

Firmware update issue on web interface fixed

2.2.1

Released: April 20, 2021

Fixes

Modem CLI bugs fixed
CLI outlet JSON output bugs fixed
Version reporting issues fixed

2.2.0

Released: April 19, 2021

New features and improvements

Configurable outlet boot state added and controllable via web interface
Modem functionality added to CLI
Hardware and firmware reporting added
SSH key functionality added