Description

MATEKSYS H7A3-SLIM FLIGHT CONTROLLER – 30X30MM

Packed with features, the H7A3-Slim from Matek is ready to go. Compatible with INAV, Betaflight, and ArduPilot.

SPECIFICATIONS:

MCU: STM32H7A3RIT6, 280MHz Cortex-M7, 1.4MB RAM, 2MB Flash
IMU: ICM42688P
Baro: SPL06-001
OSD: AT7456E
Blackbox: 128MB Flash (1G-bit NAND)
6x Uarts (1,2,3,4, 5, 6) with built-in inversion.
11x PWM outputs
1x I2C
1x CAN
4x ADC (VBAT, Current, VB2, Cur2)
3x LEDs for FC STATUS (Blue, Red) and 3.3V indicator(Red)
USB Type-C(USB2.0)
8x PWM outputs on 2x JST-SH1.0_8pin connector for 2x 4in1 ESC
1x JST-GH1.25_4pin connector (5V/CAN-H/CAN-L/G)
9V output ON/OFF switchable
Digital video OSD is supported by any spare UART

Power

Vbat Input: 6~36V (2~8S LiPo)
BEC: 5V 2A cont. (Max.3A)
BEC: 9V 2A cont. (Max.3A)
LDO 3.3V: Max.200mA
No Current Sensor built-in
ADC VB2 pad supports Max. 69V (voltage divider: 1K:20K)

FC Firmware

ArduPilot: MATEKH7A3 (4.6 or newer)
ArduPlane https://firmware.ardupilot.org/Plane/latest/MatekH7A3/
ArduCopter https://firmware.ardupilot.org/Copter/latest/MatekH7A3/
Flashing with STM32CubeProgrammer

Physical

Mounting: 30.5 x 30.5mm, Φ4mm with Grommets Φ3mm
Dimensions: 36 x 36 x 5 mm
Weight: 7g
3D step H7A3-SLIM_step.zip

ArduPilot Mapping:

RC INPUT

RC input is configured on the USART2(SERIAL2). It supports all serial RC protocols. SERIAL2_PROTOCOL=23 by default.

PPM is not supported.
CRSF requires Tx2 & Rx2 connection, and set SERIAL2_OPTIONS to “0” (default).
SBUS/DSM/SRXL connects to the Rx2 pin, but SBUS requires that the SERIAL2_OPTIONS be set to “3”.
FPort requires connection to Tx2, and set SERIAL2_OPTIONS to “7”. If Telemetry doesn’t work, try set SERIAL7_OPTIONS = 135.
SRXL2 requires a connection to Tx2, and automatically provides telemetry. Set SERIAL2_OPTIONS to “4”.
Any UART can be used for RC system connections in ArduPilot also, and is compatible with all protocols except PPM. See Radio Control Systems for details.

ArduPilot Relay(PINIO)

9V output ON by default
PC13 PINIO1 OUTPUT GPIO(81) //9V power switche.g.

RELAY_PIN 81 // PINIO1 GPIO
RC7_OPTION 28 //Relay On/Off, Use CH7 of Transmitter to set 9V ON/OFF

The configured feature will be triggered when the auxiliary switch’s pwm value becomes higher than 1800. It will be deactivated when the value falls below 1200.

Check the pwm value sent from the transmitter when the switch is high and low using the Mission Planner’s Initial Setup >> Mandatory Hardware >> Radio Calibration screen. If it does not climb higher than 1800 or lower than 1200, it is best to adjust the servo end points in the transmitter.