Here are the improvements and changes we made to the ZEN76 S2 On/Off Switch model so far.

VER. 1.0 (released 12/2020)

Original release.
Hardware:

• Based on the ZEN26 500 series version with simple direct 3-way solution
• 700 Series Z-Wave chip
• Just 1.16" deep
• No heatsink tabs
• Multicolor LED indicator
• Replaceable paddles (color kits available here)

Firmware: 1.02

• SmartStart and S2 authenticated security

• Built-in range test tool

• Built-in signal repeater

• Smart bulb mode

• Scene control command class (multi-tap triggers)

VER. 10.0 (released 6/2021)

Firmware: 10.0

• Removed manual operation delay with scene control disabled
• Fixed smart bulb behavior after a power outage: the actual status of the relay and the reported status of the relay are both restored correctly now
• Added the ability to disable programming function from the paddles (parameter 17, see all of the settings here)

VER. 10.10 (released 09/2022 as OTA)

Firmware: 10.10

• Fixed S2 inclusion issue related to data packet size for advanced setting labels which affected selected hubs and scenarios

VER. 10.20 (released 05/2023 as OTA)

Firmware: 10.20

• Fixed central scene bug for control of its own load in smart bulb mode
• Added parameter 18 to disable LED blinking when a setting is changed. See all settings here.
• Changed the manual operation for disabling the relay (smart bulb mode): Hold the UPPER paddle for 10 seconds until the LED indicator starts blinking, then within 2 seconds, tap the upper paddle 5 times quickly to change this mode. The LED indicator will stay solid green for 3 seconds to confirm the change.
• Improved the factory reset procedure: The switch will not lock up if the factory reset is not successful in certain scenarios. 

VER. 2.0 (released 06/2022)

Hardware: 2.0

• Updated the Voltage regulator to improve surge protection

Firmware: 2.0

• Based on 10.00 firmware (see above)

VER. 2.10 (released 09/2022 as OTA)

Firmware: 2.10

• Based on 10.10 OTA changes (see above)

VER. 2.20 (released 05/2023 as OTA)

Firmware: 2.20

• Based on 10.20 OTA changes (see above)

VER. 800LR (released 05/2023)

Hardware: 3.0

• 800 Series Z-Wave chip

Firmware: 3.10

• Based on 10.20 firmware (see above)
• Long Range ready

Firmware: 3.20 (released 07/2023 as OTA)

• Addressed issues with the switch occasionally showing offline or becoming unresponsive on select platforms.

Firmware: 3.30 (released 09/2023 as OTA)

• Improved Direct Association Group 2 for the basic set on/off functionality. 

Firmware: 3.40 (released 09/2024 as OTA)

• Fixed the Range Test Tool feature

Your ZEN76 700 Series S2 On/Off Switch can be updated via OTA firmware updates, here is how to do that. After you register your product and create an account here, you can access all firmware files here. Need help? Please reach out to our support team, we reply 7 days a week!