Get the latest firmware and bootloader

  1. Download the latest firmware from here.
  2. Download the latest bootloader from here.

Download and install the Nordic nRF connect app 

  1. Open your iTunes AppStore and Search for "nRF Connect"
  2. Install the app on your device

Download and install the LightBlue Explorer

  1. Open your iTunes AppStore and Search for "LightBlue Explorer"
  2. Install the app on your device

Copy the necessary files to your iOS device.

  1. Connect your iOS device to your PC or Mac and open iTunes.
  2. Select your iOS device in iTunes and then select "File Sharing".
  3. Select the "nRF Connect" App and add the two files you've downloaded beforehand to the "Documents" section.
  4. Click "Sync" and then "Done"


Video Instruction


Set the ZEI° in DFU mode

  1. Turn on Bluetooth on your device
  2. Open the LightBlue app
  3. Turn on your ZEIº
  4. Klick on Timeular ZEIº to connect with your ZEI°
  5. Wait until the list is loaded
  6. Scroll down to Service "UUIDC7E70000-..." and tap on it in the white area
  7. Klick on Listen for notifications
  8. Klick on Write new value
  9. Write the value "01" and press Done
  10. Now you see am massage Disconnected Alert
  11. Klick on the Write new value
  12. Go to the Dismiss
  13. Close the app
  14. Now your ZEI° is in DFU mode

Upload the firmware

  1. Set your ZEI° in DFU Mode (see the instructions above)
  2. Open the nRF Connect App
  3. Connect to your ZEI° in DFU Mode
  4. Wait until the list is loaded
  5. Klick on the DFU Button in the lower right corner
  6. Select file type "Distribution packet (ZIP) " and hit OK
  7. Choose the ZIP Package "ZEI_320-801b_s130_app_dfu_package_v113.zip"  from your device.
  8. Hit the "Play" Button to start the update 
  9. Wait until the upload is completed
  10. Klick on Close in the upper right corner
  11. Close the nRF Connect App
  12. Now the Firmware was updated on your ZEI°
  13. Update the Bootloader on your ZEI° (this is important!)

Update the Bootloader 

  1. Set your ZEI° in DFU Mode (see the instructions above)
  2. Open the nRF Connect App
  3. Connect to your ZEI° in DFU Mode
  4. Wait until the list is loaded
  5. Klick on the DFU Button in the lower right corner
  6. Choose the ZIP Package "ZEI_320-801b_s130_bl_dfu_package_v113.zip"  from your device
  7. Hit the "Play" button to start the update 
  8. Wait until the upload is completed
  9. Click on Close in the upper right corner
  10. Close the nRF Connect App
  11. Now the Bootloader was updated on your ZEI°
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