Ultra-Compact Open Flight Controller

Tustin Mach

An ultra-compact open flight controller for space- and weight-constrained platforms, with CAN expansion and high-rate flight logging for small UAVs, robotics and research prototype integration. Tustin Mach has entered both the ArduPilot and PX4 communities, with INAV and Betaflight support planned.

Available now Small UAVs & robotics ArduPilot & PX4 communities INAV & Betaflight planned China-standard RID identity

Buy on Taobao →

Hardware Details

Main controller STM32H743VIT6

IMUs ICM-45686 + BMI088 dual-IMU design

Parameter storage Dedicated ferroelectric RAM (FRAM)

Identity storage EEPROM for the China-standard RID unique product identifier

Product stage Available now

Target aircraft Small UAVs, robotics and research prototypes

Expansion bus CAN

Flight logging High-rate microSD flight-data logging

Open-source ecosystem ArduPilot and PX4 communities; INAV and Betaflight support planned

Mechanical Dimensions

36 × 36 mm board, 30.5 × 30.5 mm mounting pattern, Ø4 mm mounting holes, 8 mm overall height and 10 g weight. The side profile is a structural illustration; the physical product takes precedence.

Connector Pinout Diagram

Read horizontal connectors left to right and vertical connectors top to bottom. Board signal connectors use the SH1.0 specification, except for USB Type-C. Product images are provided only to illustrate connector locations and pin order; the physical product takes precedence. Confirm the connector orientation before wiring hardware.

Connector side

M5-M8 ESC Left to right

RX7CURM8M7 M6M5VBATGND

M1-M4 ESC Left to right

RX7CURM4M3 M2M1VBATGND

Both ESC headers share the UART7 receive signal RX7 and current-sense input CUR. VBAT range: 3-8S.

TELEM3UART5

GND5VTX5RX5

TELEM2UART4

GND5VTX4RX4

CAN

5VCANHCANLGND

Tustin Mach connector-side pinout rendering

VTXAnalog video output

TX2VIDEO_OUTGND12V

SWDDebug

SWCLKSWDIOGND3V3

GPS1UART3 + I2C1 · left to right

5VTX3RX3SCLSDAGND

TELEM1UART1

GND5VTX1RX1

RCUART6

GND5VTX6RX6

Controller side Power and secondary peripheral connections

CAMAnalog video input

VIDEO_INGND12V

GPS2 / DJI O3/O4UART2 + RX6

12VGNDTX2 RX2GNDRX6

USB Type-C Power, firmware upload and USB communication

Tustin Mach controller-side pinout rendering

I2C1Expansion

GNDSDASCL5V

Shared RX6 The RC and GPS2/DJI connectors expose the same UART6 receive signal.

Power connections are not interchangeable: the motor headers carry 3-8S VBAT, the CAM, GPS2/DJI and VTX interfaces use 12V, general peripheral ports use 5V, and SWD exposes 3.3V.

Serial Port Mapping

ArduPilot PX4

ArduPilot Serial Port Mapping

ArduPilot Parameter	Board Port	Physical Layer (Board Silkscreen)
`SERIAL0`	USB	USB virtual serial port
`SERIAL1`	`TELEM1`	UART1
`SERIAL2`	`GPS2`	DJI
`SERIAL3`	`GPS1`	GPS
`SERIAL4`	`TELEM2`	UART4
`SERIAL5`	`TELEM3`	UART5
`SERIAL6`	`RC`	UART6
`SERIAL7`	ESC telemetry	UART7 (RX-only)

Set each port's function with its corresponding SERIALx_PROTOCOL parameter.
SERIAL7 receives ESC telemetry through the shared RX7 signal on both ESC headers.

PX4 Serial Port Mapping

NuttX Layer	PX4 Layer (Software Parameter Configuration)	Physical Layer (Board Silkscreen)
`ttyACM0`	USB	USB virtual serial port
`ttyS0`	`TELEM1`	UART1
`ttyS1`	`GPS2`	DJI
`ttyS2`	`GPS1`	GPS
`ttyS3`	`TELEM2`	UART4
`ttyS4`	`TELEM3`	UART5
`ttyS5`	`RC`	UART6
`ttyS6`	`UART6`	UART7 (RX-only)

ttyS6 maps to the receive-only UART7 telemetry signal exposed as RX7 on both ESC headers.