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Zorro Blue User Manual

Table of contents

  1. Update SD-card Contents
  2. Update EdgeTX Firmware
  3. Update ExpressLRS

Zorro Blue NDAA compliant EdgeTx and ExpressLRS Transmitter

The Zorro Blue contains three different firmware versions that should be kept up to date for all the latest features and bug fixes.

Update SD-card Contents

  1. Update to version 0.0.13. To check, navigate to (SYS->SD CARD), then scroll to the bottom to view sdcard.version.x.x.x
  2. Remove and re-add updated SD card contents using the latest zip here
  3. Connect the Zorro Blue to your PC, then select (USB Storage). On your PC, open the SD card folder and take note of the file structure, then delete everything and copy the contents of the zip file.
  4. Restart the Zorro Blue and ensure the Zorro Blue model name is displayed correctly. If not, the copy procedure failed and must be performed again.
    • Troubleshooting: Try to eject the drive after copying, then reconnect to your PC.

Update EdgeTX Firmware

  1. Update to version 3.0.0.5 (2025-10-16). To check, navigate to (SYS->VERSION).
    • ⚠️ CRITICAL WARNING! Ensure your version is ≥ 3.0.0 and the date is at least 2025-09-02. If your version is < 3.0.0 or the date is earlier than 2025-09-02, do NOT proceed - this could BRICK your radio and render it unusable. Contact ModalAI support immediately to perform the update safely.
  2. Update the EdgeTX firmware using the latest firmware stored on the SD card.
  3. Begin by holding SYS when powering up, then select “Write Firmware”.
  4. Update the EdgeTX bootloader by power-cycling the Zorro Blue, then navigate to (SYS->SD Card->Firmware), select the firmware, and hold Enter.
    • ⚠️ If the bootloader update says “not compatible”, do NOT proceed. Contact ModalAI support immediately.
  5. Calibrate the analog sticks and potentiometers, as overwriting the SD card erases calibration.
    • Navigate to (SYS->Hardware->Calibration), press Enter to start, then follow the on-screen directions.

Update ExpressLRS

  1. Update to version 3.5.3.18. To check, navigate to (SYS->TOOLS->ExpressLRS), then scroll to the bottom to view x.x.x.x.
  2. Update the M0193-TX ELRS using the ExpressLRS Configurator. On the Zorro Blue, connect USB to your machine and select VCP, then update with the configurator. Example shown below.
  3. After cloning ExpressLRS, check out the recommended tag from step 1 with git checkout x.x.x.x.