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Home > Zooz Light Switches > ZEN24 Toggle Dimmer Switch > ZEN24 Toggle Dimmer Change Log
ZEN24 Toggle Dimmer Change Log
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Here are the changes and updates we made to the ZEN24 model so far.

VER. 1.0 (released 12/2016)

Original release.

  • Did NOT include neutral jumper
  • Implemented the classic 3-way functionality with a dedicated add-on switch required (NO direct 3-way, do NOT connect to regular on/off switches)

Firmware: 20.16

  • No advanced settings available

VER. 2.0 (released 9/2017)


  • Added neutral jumper and short screws for wall plate
  • Added Direct 3-way solution (no add-on switch needed)

Firmware: 20.15

  • Added advanced settings for toggle control

VER. 2.01 (released 4/2018)

Firmware: 1.05

  • Added OTA firmware updates
  • Added ramp rate control (slow / fast only)

VER. 3.0 (released 4/2019)


  • Updated back cover for easier installation (larger terminal holes)
  • Terminal screws arrive loose (unscrewed) for easier installation
  • Updated wall plate screw installation design (added more room for the screw to fit in easily)
  • Added foam to packaging

Firmware: 3.0

  • Added scene control (2 triggers only)
  • Changed association settings to send separate reports for manual and Z-Wave control
  • Added S2 security
  • Added Built-in Timer
  • Added the ability to reset the switch to factory settings from the device directly
  • Added the ability to control load by toggling the toggle up or down
  • Added full ramp rate control
  • Added a setting to control status after power failure
  • Added minimum and maximum brightness level settings
  • Added double-tap to full / maximum brightness
  • Added double-tap behavior control

VER. 3.01 (released 6/2019)

Firmware: 3.01

  • Added full scene control
  • Expanded double-tap behavior control
  • Added the ability to disable local control


VER. 3.03 (released 8/2019)

Firmware: 3.03

  • Reduced manual control delay related to scene control functionality

VER. 3.04 (released 10/2019)

Firmware: 3.04

  • Extended manual dimming time (from 0 to 100% with paddle press-and-hold) to 4 seconds and added a setting to customize the dimming speed

VER. 3.05 (released 11/2019)

Firmware: 3.05

  • Added a setting to match Z-Wave ramp rate with physical ramp rate

VER. 3.06 (released 12/2019)

Firmware: 3.06

  • Added custom brightness setting
  • Added 3-way switch type setting to use momentary switches (like the ZAC99) in 3-way, 4-way, or 5-way set-ups without configuration limitations and with the ability to dim the light manually from each location

VER. 3.08 (released as OTA 3/2020)

Firmware: 3.08

  • Added a setting to change switch behavior with disabled manual control
  • Added night mode brightness: press and hold the lower paddle for a second to turn the light to low brightness

VER. 4.0 (released 9/2020)


  • Removed side heat sink tabs

Firmware: 4.0

  • Changed the button sequence for enabling smart bulb mode (aka disabling the relay / physical control) to 4-down-and-hold (toggle down-down-down-down'n'hold)

VER. 4.01 (released 10/2020 as OTA)

Firmware: 4.01

  • Changed power outage behavior in smart bulb mode
  • Applied timers to status reports in smart bulb mode
  • Changed the setting for Z-Wave ramp rate to automatically match the physical ramp rate (Parameter 17 set to default value 0)
  • Applied the ramp rate settings to Z-Wave triggered brightness transitions (multilevel changes)
  • Improved single-tap and long-tap timing for scene control triggers

VER. 4.03 (released 9/2021 as OTA)

Firmware: 4.03

  • Corrected the supervision command class for S2 implementation


This model has been discontinued and replaced with the ZEN74 dimmer which wires differently in 3-way and 4-way installations than the ZEN24 model (always follow the correct diagram from the manual when installing your switches). No further updates are planned for the ZEN24 device.

If your version of the toggle dimmer can be upgraded via OTA firmware updates, you can access all firmware files here after you register your product and create an account here. Questions? Just reach out to our tech support team.

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