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Holybro Pixhawk 6C

by Holybro

Community
Open Hardware

Pixhawk 6C ships in plastic or aluminum enclosures with optional bundled power modules.

Holybro Pixhawk 6C autopilot in its plastic enclosure with side connector array.

Key Specifications

MCU
STM32H743
STM32H742xI/G, STM32H743xI/G data sheet
Mounting Pattern
Cube Carrier Board
Connectivity
7 UARTs ā€¢ 2 IĀ²C ā€¢ 2 CAN
Power
4.9ā€“5.5 V ā€¢ Power Module
Onboard Sensors
2Ɨ IMU ā€¢ 1Ɨ Barometer ā€¢ 1Ɨ Magnetometer
Firmware Support
ArduPilot
PX4 Autopilot
Reference Docs
ArduPilot Autopilot Hardware OptionsPixhawk 6C ā€” PX4 User GuideArduPilot Autopilot Hardware Options
Image: Holybro Store ā†—

Detailed Specifications

Core Specifications

Quick reference for the primary hardware capabilities.

MCU
STM32H743
STM32H742xI/G, STM32H743xI/G data sheet
 Mounting Cube Carrier Board
Power 4.9ā€“5.5 V ā€¢ Power Module I/O Overview 7 UARTs ā€¢ 2 IĀ²C ā€¢ 2 CAN
PWM & Storage 16 PWM outputs ā€¢ microSD logging Sensors 2Ɨ IMU ā€¢ 1Ɨ Barometer ā€¢ 1Ɨ Magnetometer

Hardware Overview

Core MCU, mounting, and mechanical data.

Base hardware specification
Default
MCU
STM32H743
STM32H742xI/G, STM32H743xI/G data sheet
 Mounting Cube Carrier Board
Dimensions 44 Ɨ 84.8 Ɨ 12.4 mm Weight 59.3g

Power Supply

Input rails, regulators, and redundancy.

Voltage ā€”
Inputs 3
Redundancy Redundant

Power Inputs

POWER1 Power Module
Connector:  6-pin power monitor
Voltage:  4.9ā€“5.5 V
POWER2 Power Module
Connector:  6-pin power monitor
Voltage:  4.9ā€“5.5 V
USB USB
Connector:  USB Type-C
Voltage:  4.75ā€“5.25 V
Input Voltage ā€” Redundancy āœ“ Yes

Max input 6V with 0-36V servo rail tolerance; triple-redundant POWER1/POWER2/USB inputs.

Connectivity & I/O

Port availability, buses, and expansion options.

UARTs 7 CAN Bus 2
PWM Outputs 16 SD Card āœ“ Yes
Ethernet āœ— No

Peripheral Ports

Port Type Default Function Voltage / Level Connector Notes
TELEM1 UART Primary MAVLink telemetry 3.3 V signal / 5 V @ 1.5 A peripheral power JST-GH 6-pin Dedicated 1.5 A regulator powers telemetry radios or companion computers.
TELEM2 UART Secondary telemetry link 3.3 V signal / 5 V supply JST-GH 6-pin Full RTS/CTS hardware flow control ideal for long-range radios.
TELEM3 UART Configurable serial payload bus 3.3 V signal / 5 V supply JST-GH 6-pin Assignable UART commonly repurposed for scripting, ESC telemetry, or ELRS receivers.
GPS1 GPS Primary GPS/compass/safety harness 3.3 V signal / 5 V supply JST-GH 10-pin Integrates safety switch, buzzer, and I2C compass with the first GPS receiver.
GPS2 GPS Secondary GPS 3.3 V signal / 5 V supply JST-GH 6-pin Provides redundant navigation receiver connection or RTK base input.
CAN1 CAN DroneCAN peripheral bus Differential CAN / 5 V supply JST-GH 4-pin Supplies regulated 5 V for smart batteries, ESCs, or nodes.
CAN2 CAN Redundant DroneCAN network Differential CAN / 5 V supply JST-GH 4-pin Supports CAN-FD peripherals and ESC daisy-chains.
I2C1 I2C External sensor bus 3.3 V JST-GH 4-pin Shared with GPS1 harness for compasses and digital sensors.
I2C2 I2C Auxiliary I2C expansion 3.3 V JST-GH 4-pin Additional I2C breakout on the side panel for airspeed or rangefinder peripherals.
RCIN RC Serial RC input (SBUS/DSM/FPort) 3.3 V signal / 5 V supply JST-GH 6-pin Timer-capable input supporting PWM/PPM legacy receivers and modern serial protocols.
S.BUS OUT / RSSI RC Redundant receiver output and RSSI 3.3 V signal JST-GH 3-pin Provides S.Bus passthrough alongside analog RSSI monitoring.
FMU PWM OUT (1-8) PWM Primary motor outputs Selectable 3.3/5 V signal (servo rail 0-36 V) Servo rail bank A FMU-controlled outputs supporting DShot on groups 1-3.
IO PWM OUT (9-16) PWM Auxiliary PWM outputs Selectable 3.3/5 V signal (servo rail 0-36 V) Servo rail bank B IOMCU-managed outputs for secondary motors, payloads, or actuators.
POWER1 Power Primary power module input 4.9-5.5 V 6-pin power monitor Supplies redundant 5 V and SMBus telemetry from the first power module.
POWER2 Power Secondary power module input 4.9-5.5 V 6-pin power monitor Provides backup 5 V supply with the same SMBus monitoring capability.
SERVO RAIL Power PWM servo supply 0-36 V tolerant Servo rail bus High-voltage tolerant rail powering PWM outputs independently from logic.
USB-C USB Console and firmware updates 5 V USB Type-C Provides SERIAL0 console, bootloader access, and configuration interface.
Buzzer/Safety Other External safety switch and buzzer 5 V supply JST harness Combined harness for safety button, RGB LED, and audible alarm.

Onboard Sensors

IMU, barometer, and magnetometer load-outs per revision.

IMU
Bosch Sensortec BMI088
Bosch Sensortec BMI088 datasheetCUAV Pixhawk V6X ā€” ArduPilot Hardware OverviewPixhawk 6X ā€” PX4 User GuideCUAV Pixhawk V6X ā€” ArduPilot Hardware Overview
TDK InvenSense ICM-42688-P
TDK InvenSense ICM-42688-P datasheetCube Orange+ ā€” PX4 User Guide
Barometer
TE Connectivity MS5611
TE Connectivity MS5611 datasheetCube Orange+ ā€” PX4 User Guide
Magnetometer
IST8310
IST8310 datasheetPixhawk 6C ā€” PX4 User GuidePixhawk 6C Flight Controller ā€” Holybro

Additional Features

Value-add capabilities bundled with the controller.

  • āœ“ Hardware-selectable PWM signal voltage
  • āœ“ Integrated vibration isolation
  • āœ“ Redundant IMU stack

Known Issues & Advisories

BMI088 IĀ²C driver produces unstable gyro data

PX4's bmi088_i2c driver reports severe gyro jitter and unusable orientation on Crazyflie and other IĀ²C-based boards.

Medium
Reported
Source BMI088 connected via I2C does not work right
Affects Bosch Sensortec BMI088
Onboard IMU

Documentation & Vendor Resources

Edit on GitHub

Propose improvements to this controller entry.

ā†—
Contributors: Jairus
Last updated:
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