AVATAR KIT

Introduction

The AVATAR KIT air unit is depicted with labeled components: 1. 6Pin Port, 2. IPEX Antenna Ports, 3. Antenna, 4. Link Button, 5. Mounting hole (25.5x25.5mm, m2), 6. Camera, 7. Coaxial Cable, 8. LED Indicator, 9. USB Port.

Installation instruction: Ensure the antenna and coaxial cable are securely installed before powering on the device.

Connection

The connection diagram illustrates the wiring for the AVATAR KIT. It details the pinout for a 6-pin connector: 1. Power (6V-25.2V), 2. Power GND, 3. Uart RX (connects to Flight Controller TX), 4. Uart TX (connects to Flight Controller RX). It also shows USB connections: 5. USB-DP, 6. USB-DM, 7. USB-GND, 8. USB-5V.

Important Note: When using a 6s battery, it is crucial to install a capacitor with a rating of 50V / 47uF or higher across the power input terminals.

Linking

The linking process involves connecting the air unit and FPV goggles to power. Wait for the air unit's green LED to flash and the status icon to appear on the goggles. Press the link button on both the air unit and goggles simultaneously. The air unit's indicator will turn red, and the goggles will emit a 'di...di...di...' sound, indicating pairing mode. Successful pairing is confirmed by the air unit's indicator turning solid green and the goggles stopping the beeping sound and displaying the video feed.

Firmware Upgrade

To upgrade the firmware, download the appropriate files (Avatar_Sky_X.X.X.img for the air unit, Avatar_Gnd_X.X.X.img for the goggles) from the official Walksnail website. Copy these files to the root directory of the air unit or an SD card, ensuring the filenames are not changed. The air unit requires power to function as a USB drive. Copy the files, connect the power supply, and wait for initialization. If existing firmware files are present, delete them first. Press and hold the pairing button on both the air unit and goggles for 8 seconds to enter upgrade mode. The air unit's indicator will flash red, and the goggles will beep. Note that the upgrade process can take some time; avoid disconnecting power during the upgrade. Upon completion, the air unit's indicator will flash green, and the goggles will emit a prolonged beep for 5 seconds. Re-sync the devices after the upgrade.

UART

The UART function allows the air unit to communicate with the flight controller, enabling data exchange. The following steps detail the UART setup using Betaflight Configurator:

1. Solder the white and gray wires from the 6-pin cable to the corresponding TX and RX pins on your flight controller (refer to the Connection diagram).
2. Connect your flight controller to the Betaflight Configurator software. Navigate to the Ports tab, select the appropriate UART port (e.g., UART1), enable the MSP (Multi-Protocol Serial) protocol, and click Save.
3. Access the Command Line Interface (CLI) within Betaflight Configurator and enter the following commands, pressing Enter after each: set osd_displayport_device = MSP, set displayport_msp_serial = Y (replace 'Y' with the serial port number minus one; for example, if using Serial 3, enter '2'), followed by save.

Status Indication

Goggles Buzzer Status:

• In pairing state: di...di...di...
• Upgrade firmware: di......di......di...... di
• Upgrade failed: di..di..di..

VTX Indicator Status:

• In pairing state: Steady red light
• Upgrade firmware: Red light rapidly flashes
• Wireless connection, image output is normal: Steady green light
• Wireless not connected: Green light rapidly flashes
• Wireless connection is normal, but the image is abnormal: Green light slowly flashes

Specifications

Operating Channel:

VTX Specification:

• Model: Avatar module
• Dimensions: 33 x 33 x 9.5 mm
• Hole spacing: 25.5 x 25.5 mm (m2 hole)
• Weight: 16 g
• Operating Frequency: 5.660-5.839 GHz
• Transmitter Power (EIRP): FCC/SRRC/MIC: <30 dBm; CE: <14dBm
• Min. Latency (end-to-end): Low Latency Mode (720p 22ms); High Quality Mode (1080p 38ms)
• Max. Transmission Distance: FCC/SRRC/MIC: <4 km; CE: 0.7 km
• Video Format: MP4 (Video format: H.264)
• I/O Interface: 6pin, 4pin, IPEX
• Operating Temperature Range: -10℃-40℃
• Input Power: 6-25.2 V (12V@700mAh±100mAh)

Camera Parameters:

Avatar Nano Camera:

• Model: Avatar Nano Camera
• Dimensions: 17 x 14 x 14 mm
• Weight: 2.9 g
• Image Ratio: 16:9
• Sensor: 1/2.9" CMOS
• Aperture: F/2.0
• ISO: 100-25600
• FOV: 180°(D);160°(H);90°(V)

Avatar Camera:

• Model: Avatar Camera
• Dimensions: 21.8 × 19 × 19 mm
• Weight: 6.9 g
• Image Ratio: 16:9
• Sensor: 1/2.9" CMOS
• Aperture: F/2.1
• ISO: 100-25600
• FOV: 180°(D);160°(H);90°(V)

Antenna Parameters:

• Model: Polar antenna
• Dimensions: 105 x 11.2 mm
• Weight: 1.5 g
• Bandwidth: 5650-5950MHz
• Polarization: LHCP
• Average gain: 2 dBi
• VSWR: <1.4
• Efficiency: 98%
• Connector: U.FL

FCC Compliance

FCC WARNING

FCC Caution: Any changes or modifications not expressly approved by the party responsible for compliance could void the user's authority to operate this equipment. This device complies with Part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) This device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation. This device and its antenna(s) must not be co-located or operating in conjunction with any other antenna or transmitter.

15.105 Information to the user.

(b) For a Class B digital device or peripheral, the instructions furnished the user shall include the following or similar statement, placed in a prominent location in the text of the manual: Note: This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures: - Reorient or relocate the receiving antenna. - Increase the separation between the equipment and receiver. - Connect the equipment into an outlet on a circuit different from that to which the receiver is connected. - Consult the dealer or an experienced radio/TV technician for help.

This equipment complies with FCC radiation exposure limits set forth for an uncontrolled environment. This equipment should be installed and operated with minimum distance 20 cm between the radiator and your body.

Radiation Exposure Statement:

This equipment complies with FCC radiation exposure limits set forth for an uncontrolled environment. This transmitter must not be co-located or operating in conjunction with any other antenna or transmitter.

The availability of some specific channels and/or operational frequency bands are country dependent and are firmware programmed at the factory to match the intended destination. The firmware setting is not accessible by the end user.

The final end product must be labelled in a visible area with the following: 'Contains Transmitter Module "2A78Z-AVATAR"'.

Requirement per KDB996369 D03

2.2 List of applicable FCC rules:

This module meets the requirements of FCC part 15C (15.407), including AC Power Line Conducted Emission, Radiated Spurious emissions, Band edge and RF Conducted Spurious Emissions, Conducted Peak Output Power, Bandwidth, Power Spectral Density, and Antenna Requirement.

2.3 Summarize the specific operational use conditions:

The antenna used is the CADDX snail antenna, with a length of 11CM, width of 1CM, and a gain of 2dBi.

2.4 Limited module procedures:

The module is a single module.

2.5 Trace antenna designs:

The antenna is the CADDX snail antenna, with a length of 11CM, width of 1CM, and a gain of 2dBi.

2.6 RF exposure considerations:

The module complies with FCC radiofrequency radiation exposure limits for uncontrolled environments. The device must be installed and operated with a distance of more than 20 cm between the radiator and the user's body. This module follows FCC statement design, FCC ID: 2A78Z-AVATAR.

2.7 Antennas:

The list of antennas included in the application for certification is the CADDX snail antenna.

2.8 Label and compliance information:

Grantees are responsible for continued compliance. Host product manufacturers must provide a physical or e-label stating 'Contains FCC ID' on their finished product.

2.9 Information on test modes and additional testing requirements:

Walksnail Innovation Technology(Shenzhen)Co.,Ltd. provides instructions for configuring test modes to help host manufacturers verify compliance.

2.10 Additional testing, Part 15 Subpart B disclaimer:

The module does not contain unintentional-radiator digital circuitry and therefore does not require evaluation by FCC Part 15 Subpart B. The host system should be evaluated by FCC Subpart B.

Support

Email: support@walksnail.com

Website: https://www.walksnail.com

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