TBS Lucid FC Freestyle 20x20 Flight Controller, ICM-42688P Gyro, 6 UART, 3S-6S

Overview

The TBS Lucid FC Freestyle 20x20 Flight Controller is a 20x20 flight controller designed for racing and freestyle drone builds. It uses an ICM-42688P gyro, an AT32F435RMT7 MCU running at 288MHz, six UARTs, 8 MB blackbox flash, and plug-and-play connections for compatible ESCs and the DJI O3 digital system.

The flight controller is compatible with 20x20 ESCs and supports 4-in-1 ESC connections using the Betaflight connector standard. It is designed for TBS Crossfire and TBS Tracer ecosystems while also supporting other radio receivers. Auxiliary solder pads are arranged for practical installation in compact drone frames.

Key Features

• ICM-42688P gyro for the Freestyle version.
• AT32F435RMT7 MCU with a 288MHz clock.
• Six UARTs and 8 MB blackbox flash.
• Plug-and-play FC-to-ESC and DJI O3 connections.
• USB-C interface, ESC connector, bootloader button, status LED, receiver interface, and HD video interface.
• Four motor outputs with telemetry and current sensing.
• 9V and 5V BEC outputs.
• Early production samples had the UART3 RX and TX silkscreen markings reversed. The corrected production units use the proper markings.

Specifications

Default and Recommended Port Assignment

• UART2: ESC telemetry
• UART3: DJI O3 Air Unit
• UART4: DJI O3 SBus
• UART5: CRSF receiver
• UART7: GPS
• UART8: SmartAudio

Documented Flight Controller Configuration

• Betaflight board orientation: Roll 180 degrees, Pitch 0 degrees, Yaw 90 degrees.
• First gyro direction: clockwise, 0 degrees.
• MAG alignment: default.
• Betaflight external voltage sensor: scale 210, divider 10, multiplier 1.
• INAV external voltage sensor: scale 2100, offset 0.
• GPIO functions are high-level active.
• Betaflight CameraControl and INAV ADC In use MCU pin PC5.
• SWDIO uses MCU pin PA13 for User 1, and SWDCLK uses MCU pin PA14 for User 2.

For User 1 and User 2 pin functions in INAV, the documented CLI commands are set pinio_box1 = 47 and set pinio_box2 = 48. To enable the camera-control pin as ADC, the documented command is set vbat_adc_channel = 3. The pinout documentation notes that the SWDIO and SWDCLK user functions are removed on flight controllers marked P4 and later. It also notes that boards marked P1, P2, or P3 do not support voltage selection and that the VBAT pin is directly connected to battery voltage.

For product or setup assistance, contact https://rcdrone.top/.

What's Included

• TBS Lucid 20x20 FC
• FC-to-ESC plug-and-play cable
• DJI O3 plug-and-play cable
• 4 M3 rubber dampers
• 4 M3 x 8 screws

Applications

Suitable for 20x20 racing and freestyle drone builds using compatible 20x20 ESCs, 4-in-1 ESCs, DJI O3 digital video equipment, GPS, CRSF receivers, or SmartAudio devices.

Manuals

• STEP file for design and prototyping
• TBS Lucid Manual

Details