Below is the changelog for the Blue Series 2-1 Switch (VZM31-SN).
Rows highlighted in blue are production firmware versions
Parameters that are hyperlinked lead to the official Blue Series 2-1 Switch • Parameters page for further explanation.
Each Firmware Version is hyperlinked to the corresponding GitHub folder
In the, "Firmware Version" column, you can find the date code which will tell you what firmware version your switch was produced with. Date codes can be found on the top left of your switch
Jul. 24, 2023
Modified P22 so that Single-Pole Full Sine Wave is the default
Modified when P22 is set to a value of 3, P258 will be automatically switched to 1 (On/Off Mode)
Added a Quick Tap Feature to show the firmware version
Added a Quick Tap Feature to switch to Leading or Trailing Edge
Fixed: Optimized issue where switches cannot join hub
Fixed: Optimized the transmitting power of the wireless signal
Officially added Leading / Trailing Edge parameter.
Apr. 11, 2023
Modified P56 range 0-254 (allow double-tap to turn device off)
Optimized dimming flicker problem
Mar. 17, 2023
Further optimized Zigbee messaging
Mar. 15, 2023
Optimized compatibility with dimmable bulbs
Optimized Zigbee messaging network processing
Fixed: Incorrect behavior of P5
Fixed: Adjust the output voltage under non-neutral
Fixed: Mode is not automatically switched to, "dimmer" when the user selects smart bulb mode
Fixed: Reduced unnecessary Zigbee broadcasts
Feb. 10, 2023
Minimum levels are better optimized w/neutral wire
Added Trailing Edge Dimming¹
Fixed: Ramp Rate remote sometimes not being applied
Trailing Edge Dimming improved switch buzz and LED Bulb Flicker.
Please see notes at the bottom for limitations.
Jan. 18, 2023
Added Option #3 to P22 (Switch Type) - Single-Pole Full Sine Wave
Added Disable Remote Control as a special cluster command (Manufacturer specific command 0x10 (0x00 Enable Remote Control, 0x01 Disable Remote Control)
Fixed: The duty cycle value of dimming will be less than the Max Level Value (miscalculation of max level when that setting is set)
Fixed: Bug that was making set level, "duration" not work correctly
Fixed: Excessive broadcast Report Attributes
Single-Pole Full Sine Wave improves On/Off performance
Nov. 11, 2022
Fixed: Deployed a fix for the ability to send commands to group binding
Nov. 08, 2022
Removed the sending of multicast commands to avoid switches that would accidentally control other devices within a group
Fixed: Deployed a fix for the wrong destination endpoint used when sending some commands
2.07 introduced a bug with group binding control and it is currently required that you use individual device binding. We recommend not updating to this version.
Nov. 07, 2022
Fixed: Deployed a fix for devices that are bound to the switch not using speed parameters 1-8
Nov. 04, 2022
Trailing Edge Dimming can only be used if you have a neutral wire and have a Single-Pole or 3-Way Aux setup
Updating Your Firmware
To update your firmware, please click on the hub you have to be taken to specific instructions.