You are using an unsupported browser. Please update your browser to the latest version on or before July 31, 2020.
Looking for Z-Box Hub Support? Please click here to access the Z-Box Hub Support Portal.
announcement close button
Home > General Questions > Firmware Updates > How to Perform an OTA Firmware Update on Zooz Devices
How to Perform an OTA Firmware Update on Zooz Devices
print icon

You can keep most of our products up to date by using the OTA (over-the-air) method. While the most popular Z-Wave platforms provide a direct method, some still do not so we created custom instructions using free third party software to update your devices. If you have Hubitat, HomeSeer, Home Assistant or Z-Box, check out the hub-specific update instructions below. For all other hubs, including SmartThings, follow the Simplicity Studio's PC Controller instructions.

This article covers OTA updates for end devices only, if you have a Zooz Z-Wave stick, please select your product below for dedicated OTW instructions:

 Where do I get the firmware files? 

SKIP to Simplicity Studio's PC Controller OTA Updates if you are not a user of Hubitat, HomeSeer, Home Assistant or Z-Box.


Hub Specific OTA Instructions


Check out our Hubitat-specific instructions here: How to Perform an OTA Firmware Update on Zooz Devices on Hubitat



If you have HomeSeer as your platform,  you can follow the instructions here: How to Perform an OTA Firmware Update on Zooz Devices on HomeSeer


Home Assistant

If you use Home Assistant Z-WaveJS as your platform, click here for OTA firmware update instructions. You may need to exclude and re-include your devices without security in order to help the firmware update go through. We recommend bringing the hub as close as possible too.



Quick and simple, just follow the instructions in our article: How to Perform an OTA Firmware Update for Z-Wave Devices on Z-Box


Simplicity Studio's PC Controller OTA Updates

These instructions are for all other hub users (including SmartThings) whose hubs do not provide a way to update end device firmware.

Please read ALL of the below instructions and disclaimers very carefully before flashing your device with new firmware. All updates are at your own risk. Products bricked during an update are not eligible for warranty service, replacement, or return.


  • Remember to unzip the file after you download it and before using it to update your device. 500 series device files will use the .otz or .hex format while 700 & 800 series device files will use the .gbl format.
  • Always double check that you're applying the correct firmware file to the right model and version of your Zooz device. Loading the wrong version to your device may deem it unusable.
  • You may need to exclude and re-include the device after the update is complete for best performance. Please consider you may need to then rebuild all of your automations and settings for the device.
  • If you notice an error about the wrong fragment size, please change the fragment size to 20 before attempting the update again.
  • If your device doesn't function correctly after the update is complete, please exclude it from your hub, factory reset the device, and then re-include it.
  • Firmware updates should usually take anywhere from 5 to 15 minutes depending on connection quality and how much information needs to actually be updated on a given device. If it is taking longer than that, please try to bring the hub / controller closer to the device that is being updated.

What You Need:

  • Z-Wave USB stick / dongle from any manufacturer
    • Click here to get the S2 Zooz Z-Wave Plus Stick
    • If you're using one with an open source set-up like OpenHAB you can use the same Z-Wave stick
  • Laptop or PC with at least 1 available USB port using Windows OS to run the necessary software
    • Simplicity Studio offers Linux / Mac version installers but we're unable to verify these will work for firmware updates
  • Device Specific OTA Firmware File
    • 500 series devices will use a file format with an .otz or .hex extension
    • 700 & 800 series devices will use a file format with a .gbl file extension.
    • If you do not see newer firmware available or do not see any firmware updates at all, it means there haven't been any updates and your device is on the latest available firmware for your device version.

Part One - Install Simplicity Studio Software

  1. Go
  2. Scroll down and click the Windows Installer button
  3. Create an account with Silicon Labs.
    • You may need to re-navigate to after creating an account and logging in.
  4. Once logged in, the file should begin downloading when you click on the Windows Installer button again.

Part Two: Finalize and Get the PC Controller Tool

  1. Follow the instructions here to finalize installing Simplicity Studio and getting the PC Controller Tool: 
    • You need to be logged in to Simplicity Studio in order to install the PC Controller tool

Part Three - How to Update Firmware Using PC Controller Tool 

  1. Please make sure you've installed the Simplicity Studio software (Step 1) above and have the PC Controller tool installed and ready for the update (Step 2). 
  2. Launch the Simplicity Studio software and LOG IN.
  3. Exclude or remove the device you'd like to update from the Z-Wave hub it is currently paired to.
  4. Insert the Z-Wave USB stick to a USB port on your computer.
  5. Click the "Tools" button on the top to open the Tools Dialog.
  6. Select Z-Wave PC Controller.  
  7. Click on Settings (the gear icon in the top right corner) 
  8. Check the recognized USB controller on the list in the dialog window. If there's nothing there, click DETECT and then REFRESH. If the USB stick still doesn't show up, you may need to install special drivers so please contact the manufacturer of the device for instructions.
  9. Click on Network Management 
  10. Click on ADD to enroll the controller in inclusion mode, then activate your Z-Wave device the same way you did when adding it to your hub (see device manual or online instructions for device specific pairing / inclusion steps)
  11. Once the device is successfully included, please select and check it in the dialog window on the left. Then click on the OTA firmware icon (arrow pointing up) in the side menu: 
  12. Wake the Zooz device up if it's battery-powered (see device manual for wake-up instructions) then select and check it in the new dialog window. You need to be able to see the current firmware version displayed in the upper part of the dialog window. The click on GET
  13. The folder icon will become active - click on it and locate the OTA firmware file, select, and open it.
  14. Once the name of the file name appears next to the folder icon, click on UPDATE and wait for the process to be completed. Progress bar will display on the bottom of the screen, followed by a "Success" or "Completed" message. If you notice an error about the wrong fragment size, please change the fragment size to 20 before attempting the update again.
  15. Go back to main menu and click on Network Management again.
  16. Click on REMOVE to exclude your Z-Wave devices the same way you did when removing it from your hub (see device manual or online instructions for device specific exclusion / removal steps)
  17. Add the Zooz device back to your hub.

As usual, if you come across any issues during the process, feel free to reach out to our team, we're here to help!

35 out of 57 found this helpful

Have you tried our virtual assistant chatbot? This AI tool can help you find answers from thousands of articles in our Knowledge Base quickly. Find it in the bottom righthand corner of the page.

Need more help? Our friendly team is ready to help you with any questions or concerns you may have about Zooz devices. Click here to submit a support ticket.

Are your devices registered? Extended warranty and firmware access is available for registered Zooz customers. Click here to submit your registration form.

Find the latest Zooz devices and great Z-Wave deals at The Smartest House.
scroll to top icon