Walksnail Avatar GT KIT Quickstart Guide

Introduction

This guide provides essential information for setting up and operating the Walksnail Avatar GT KIT, a high-performance FPV video transmission system.

Components Overview

The Avatar GT KIT includes the following main components:

• 1. Camera: Captures video feed.
• 2. Fan: Aids in cooling the VTX.
• 3. Serial Port Pad: For UART communication.
• 4. Power Port: Connects to the power source.
• 5. Link Button: Used for binding the VTX and goggles.
• 6. Micro SD Card Slot: For firmware upgrades and recording.
• 7. VTX LED: Indicates the status of the VTX.
• 8. Antenna: Connects to the VTX for signal transmission.

Connection

Proper connection is crucial for operation. Refer to the pinout diagram for details:

Power Input:

• Input Voltage: 11.1V ~ 25.2V (4S to 6S LiPo batteries)
• GND
• Output 5V (Connect to fan only)
• GND

UART (Serial Communication):

• Uart RX (Connects to Flight Controller TX)
• Uart TX (Connects to Flight Controller RX)
• Uart RX (Spare pad)
• Uart TX (Spare pad)

Power Consumption: Approximately 12V @ 1.5A. Ensure your power supply can handle this load.

Heat Dissipation: The VTX generates significant heat during operation. Ensure adequate airflow for cooling.

Linking VTX and Goggles

1. Connect the VTX and goggles to their respective power sources.
2. Short press the linking button on the VTX and the linking button on the goggles. The VTX will enter pairing mode, indicated by a solid red VTX LED. The goggles will emit a "DI... DI... DI..." sound.
3. Upon successful linking, the VTX LED will turn solid green, the goggles' beeping will stop, and the video feed will be displayed.

Firmware Upgrade

To upgrade the firmware, download the latest version from the official website. The VTX file is typically named Avatar_Sky_X.X.X.img. Do not change the file name.

1. Copy the upgrade file to the VTX's Micro SD card. Delete any old firmware files if present.
2. Connect the power supply and wait for the device to start up.
3. Press and hold the VTX linking button for 8 seconds. Release the button after the indicator light turns off. The VTX will restart and enter upgrade mode. The indicator light will change from blinking red to solid red, then turn off. The upgrade process takes approximately 20 seconds; do not power off during this time.
4. If the VTX remains lit red, the firmware may not be detected or is incorrect. Verify the firmware file.
5. After a successful upgrade, the VTX indicator light will turn green and blink.

Note: The Avatar GT TF card slot does not have a rebound function. Apply the provided PVC sticker to the TF card before inserting it.

UART Setup for Flight Controller Communication

The UART function allows the VTX to communicate with the flight controller (FC), enabling the FC to send information to the VTX. This example uses Betaflight Configurator.

Betaflight 4.3 or earlier:

1. Solder the white and gray wires of the 4-pin cable to the appropriate UART TX and RX pads on your flight controller (refer to the Connection diagram).
2. Connect the flight controller to your computer and open Betaflight Configurator.
3. Navigate to the 'Ports' tab. Select the desired UART port (e.g., UART1).
4. In the 'Configuration' section for that UART, set 'Serial Rx' to 'MSP' and 'Telemetry Output' to 'Disabled' or 'AUTO'. Click 'Save'.
5. Open the 'CLI' tab. Enter the following commands:
   • set osd_displayport_device = MSP
   • set displayport_msp_serial = Y (Replace 'Y' with a number one less than the serial port number. For example, for Serial 3, use '2'.)
   • save

Betaflight 4.4 or later:

1. Connect the flight controller to your computer and open Betaflight Configurator.
2. Navigate to the 'Ports' tab. Select the desired UART port (e.g., UART1).
3. In the 'Configuration' section for that UART, set 'Peripherals' to 'VTX(MSP+Displayport)'. Click 'Save'.
4. Open the 'CLI' tab. Enter the following commands:
   • set osd_displayport_device = MSP
   • set vcd_video_system = HD
   • save

Status Indication

Understanding the status indicators helps diagnose issues:

Goggles Buzzer Status:

• Linking: DI...DI...DI... (repeated)
• Upgrade Firmware: DI......DI......DI...... DI- DI..DI..DI.. (sequence varies)

VTX Indicator Status:

• Linking: Solid red light
• Upgrade Firmware: Red light rapidly flashes
• Wireless connection, image output is normal: Solid green light
• Wireless not connected: Green light rapidly flashes
• Wireless connection is normal, image is abnormal: Green light slowly flashes

Precautions

• Before powering on, ensure all antennas are installed to prevent component damage.
• When in standby mode, power is limited to 10mW. Unlock the flight controller or disable standby mode before takeoff.
• If using other 5.8GHz devices simultaneously, select a different channel to avoid interference.
• If using the camera's Gyroflow function, provide shock absorption for the camera's mounting base to ensure anti-shake functionality.

VTX Specifications

Camera Parameters

VTX Antenna

Support

For support and the latest information, please visit the official website or contact:

Website: https://www.caddxfpv.com

Email: support@caddxfpv.com

Note: Content is subject to change.