v1.6.1 - 22.08.2023
  - Bugfixes
    - 'Choose File' in SSL Cert upload now usable again
    - fixed fallback to user/pass when SSH key denied

v1.6.0 - 01.08.2023
  - Features
    - added session authentication with optional CSRF token in webserver
    - updated SSL(TLS), SSH, jquery-UI libraries to newest versions
    - support for new external sensors with additional inputs
    - calibration data can be stored on external sensors
    - warning when DHCP activated but gets no answer from DHCP server
  - Bugfixes
    - removed Ciphers with AES CBC from TLS and SSH
    - removed SSH Ciphers with SHA1
    - fixed possible buffer problem in webserver

v1.5.1 - 23.02.2023
  - Features
    - extended MQTT telemetry with more electrical data
    - removed 3DES TLS Ciphersuites (SWEET32)
    - extended internal watchdog
  - Bugfixes
    - increased webserver stability when targeted by vulnerability scanners
    - send correct input data in MQTT telemetry when inverted option set

v1.5.0 - 12.08.2022
  - Features
    - new hardware platform components support
  - Bugfixes
    - DNS resolver stability improved
    - RADIUS improved timing robustness
    - SSH no more sensitive to time-critical spawning sessions
    - ModbusTCP now shows correctly 0x8000 when sensor data not avail
    - improved checking when uploading new certificates

v1.4.1 - 11.03.2022
  - Features
    - better mail headers for improved SPAM scoring
  - Bugfixes
    - fixed html body when generating HTTP status codes
    - better SMTP multiline recognition
    - improved FW update over HTTPS slow connections

v1.4.0 - 11.11.2021
  - Features
    - MQTT messaging support
    - Extended sensor messaging trigger: time-interval and value-delta
    - Support for serverside HTTP redirection to HTTPS

v1.3.7 - 07.09.2021
  - Bugfixes
    - Debouncing input states on short pulses

v1.3.6 - 28.06.2021
  - Bugfixes
    - Sends SSL encrypted E-mails when HTTPs disabled
    - Browser compatibility issues (IE)

v1.3.5 - 27.05.2021
  - Features
    - config/status maintenance export.json

v1.3.4 - 27.04.2021
  - Features
    - IP filter (ACL) list extended up to 16 entries

v1.3.3 - 21.04.2021
  - Bugfixes
    - fixed digital input status on system power-up

v1.3.2 - 12.04.2021
  - Bugfixes
    - E-Mails using CRLF as line separator to avoid 'bare linefeed rejection'

v1.3.1 - 25.03.2021
  - Bugfixes
    - Missing 'logical state' label at dashboard inputs table

v1.3.0 - 01.03.2021
  - Features
    - New action: switch all outputs (by front panel, or browser)
    - New Icon set
    - HTTP server TLS version options (TLS v1.1 / v1.2 / v1.3)
    - HTTP server supports: ECC SSL certificates, keep-alive connections
    - Support for SSH command line interface
    - New messaging options (cli push messages, beeper alert tone options, and more)
    - Adjustable output switch alert messaging channels
    - More front panel display options
  - Bugfixes
    - More reliable front panel button handling
    - Concurrent sensor events when supporting beeper alert tones
    - Residual current in front panel display

v1.2.10 - 18.02.2021
  - Bugfixes
    - Increased SMTP TCP timeout

v1.2.8 - 20.10.2020
  - Bugfixes
    - Batchmode option selection in Web-Interface

v1.2.7 - 05.05.2020
  - Features
    - IP watchdog option: outlet reset on ethernet link down
  - Bugfixes
    - NTP status data when NTP client disabled

v1.2.6 - 04.02.2020
  - Bugfixes
    - Reduced memory usage for Output watchdog

v1.2.5 - 06.12.2019
  - Bugfixes
    - possible HTTPS deadlock
    - NTP client clock drift

v1.2.4 - 06.11.2019
  - Bugfixes
    - Large E-Mail password encryption on config save/restore
    - Radius authentication with Cisco ISE

v1.2.3 - 25.10.2019
  - Bugfixes
    - Telnet tabulator completion
    - Modbus TCP connection handling
    - Timer UI: allow to remove valid-from valid-until dates
    - SMTP: cleanups when remote mail server cancels TCP connection

v1.2.2 - 26.09.2019
  - Bugfixes
    - HTTP Server stability fix on GET Request fragmentation

v1.2.1 - 19.09.2019
  - Bugfixes
    - Update from previous versions might fail

v1.2.0 - 21.08.2019
  - Features
    - Programmable timers
    - New user interface
  - Bugfixes
    - Improved noise immunity on external sensor readings

v1.1.0 - 21.03.2018
  - Features
    - Reworked sensor config user interface
    - Sensor threshold status made visible in dashboard sensor tables
    - SNMP MIB / Trap OIDs: optimized for better sensor alert messages
    - Support for combined sensors for temperature/humidity/air pressure
  - Bugfixes
    - DHCPv6 stability

v1.0.2 - 09.08.2017
  - Bugfixes
    - Compatibility of Gude Control for Android and iOS

v1.0.1 - 19.07.2017
  - Features
    - Initial release