Drotek Pixhawk 3 Pro (FMUv4pro)
:::warning PX4 does not manufacture this (or any) autopilot. Contact the manufacturer for hardware support or compliance issues. :::
The Pixhawk® 3 Pro is based on the FMUv4 hardware design (Pixracer) with some upgrades and additional features. The board was designed by Drotek® and PX4.
:::note The main hardware documentation is here: https://drotek.gitbook.io/pixhawk-3-pro/hardware :::
:::tip This autopilot is supported by the PX4 maintenance and test teams. :::
Quick Summary
Microcontroller: STM32F469; Flash size is 2MiB, RAM size is 384KiB
ICM-20608-G gyro / accelerometer
MPU-9250 gyro / accelerometer / magnetometer
LIS3MDL compass
Sensors connected via two SPI buses (one high rate and one low-noise bus)
Two I2C buses
Two CAN buses
Voltage / battery readings from two power modules
FrSky® Inverter
8 Main + 6 AUX PWM outputs (Separate IO chip, PX4IO)
microSD (logging)
S.BUS / Spektrum / SUMD / PPM input
JST GH user-friendly connectors: same connectors and pinouts as Pixracer
Where to buy
From Drotek store (EU) :
From readymaderc (USA) :
Building Firmware
:::tip Most users will not need to build this firmware! It is pre-built and automatically installed by QGroundControl when appropriate hardware is connected. :::
To build PX4 for this target:
Debug Port
The board has FMU and IO debug ports as shown below.
The pinouts and connector comply with the Pixhawk Debug Mini interface defined in the Pixhawk Connector Standard (JST SM06B connector).
| Pin | Signal | Volt |
|---|---|---|
1 (red) | VCC TARGET SHIFT | +3.3V |
2 (blk) | CONSOLE TX (OUT) | +3.3V |
3 (blk) | CONSOLE RX (IN) | +3.3V |
4 (blk) | SWDIO | +3.3V |
5 (blk) | SWCLK | +3.3V |
6 (blk) | GND | GND |
For information about wiring and using this port see:
PX4 System Console (Note, the FMU console maps to UART7).
Serial Port Mapping
| UART | Device | Port |
|---|---|---|
UART1 | /dev/ttyS0 | WiFi |
USART2 | /dev/ttyS1 | TELEM1 (flow control) |
USART3 | /dev/ttyS2 | TELEM2 (flow control) |
UART4 | ||
UART7 | CONSOLE | |
UART8 | SERIAL4 |
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