• MATEKSYS H7A3-SLIM Flight Controller, MATEKSYS H7A3-SLIM 30x30 flight controller board with USB port and labeled solder pads for UART and I2C
  • MATEKSYS H7A3-SLIM Flight Controller, MATEKSYS H7A3-SLIM 30x30 flight controller board with USB-C port, labeled solder pads, and CAN connector
  • MATEKSYS H7A3-SLIM Flight Controller, MATEKSYS H7A3-SLIM 30x30 flight controller board with USB-C port, wiring harnesses, and soft-mount grommets
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MATEKSYS H7A3-SLIM Flight Controller - ICM42688P - 30x30

MATEKSYS H7A3-SLIM Flight Controller - ICM42688P - 30x30

MATEKSYS

$95.00 USD
$95.00 USD
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The MATEKSYS H7A3-SLIM Flight Controller offers high performance in a compact 30x30mm design. It features the STM32H7A3RIT6 MCU, 280MHz Cortex-M7 processor, 1.4MB RAM, and 2MB Flash. With the ICM42688P IMU, SPL06-001 barometer, AT7456E OSD, and 128MB Flash Blackbox, it provides precise data and ample logging. The controller includes 6 UARTs, 11 PWM outputs, 1 I2C, 1 CAN port, and 4 ADC channels. It also has three status LEDs, a USB Type-C port, and a switchable 9V output. With a 30.5 x 30.5mm mounting pattern, 4mm holes, 3mm grommets, and weighing just 7g, it’s perfect for FPV racing and freestyle flying. A 3D step file is included for custom integration.

Features

  • On-Screen Display
  • 30x30 Mounting
  • Compact Design
  • Connectivity
  • Lightweight

Specifications

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

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

Including

  • 1x H7A3-SLIM
  • 6x Silicon grommets M4 to M3
  • 2x JST-SH1.0_8pin cable, 5cm,  & 8pin connectors
  • 1x JST-GH-4P to JST-GH-4P cable for CAN port, 20cm

 

Details

MATEKSYS H7A3-SLIM flight controller board with USB-C port, JST connectors, and 30.5mm mounting holes

MATEKSYS H7A3-SLIM flight controller uses an STM32H7A3 MCU with ICM42688P IMU and a USB-C port in a 30.5mm mounting pattern.

MATEKSYS H7A3-SLIM Flight Controller, MATEKSYS H7A3-SLIM 30x30 flight controller board with USB-C port and labeled solder pads

The MATEKSYS H7A3-SLIM flight controller uses a compact 30x30 layout with a USB-C port and clearly labeled pads for tidy wiring.

 MATEKSYS H7A3-SLIM flight controller close-up showing dual JST-SH 8-pin ports, JST-GH 4-pin and USB-C

MATEKSYS H7A3-SLIM uses dual JST-SH 1.0 8-pin connectors plus a JST-GH 4-pin port and USB Type-C for tidy wiring and easy setup.

MATEKSYS H7A3-SLIM flight controller layout diagram with labeled pads, JST ports, and USB-C connector

MATEKSYS H7A3-SLIM uses clearly labeled solder pads and ports for camera/VTx video, UARTs, CAN, and power connections.

MATEKSYS H7A3-SLIM flight controller wiring diagram with 4-in-1 ESCs, battery, GPS, receiver, and camera connections

MATEKSYS H7A3-SLIM uses clearly labeled pads for connecting dual 4-in-1 ESCs, VBAT power, GPS, receiver, and analog video components.

CAN wiring diagram for MATEKSYS H7A3-SLIM flight controller with CAN-H/CAN-L, 5V and GND connections

ArduPilot mapping

ArduPilot
PWM S1 PWM1 GPIO50 5 V tolerant I/O TIM1_CH2 DMA/Bi-DShot Group1
S2 PWM2 GPIO51 5 V tolerant I/O TIM1_CH3 DMA/Bi-DShot
S3 PWM3 GPIO52 5 V tolerant I/O TIM2_CH1 DMA/Bi-DShot Group2
S4 PWM4 GPIO53 5 V tolerant I/O TIM2_CH2 DMA/Bi-DShot
S5 PWM5 GPIO54 5 V tolerant I/O TIM3_CH3 DMA/Bi-DShot Gourp3
S6 PWM6 GPIO55 5 V tolerant I/O TIM3_CH4 DMA/Bi-DShot
S7 PWM7 GPIO56 5 V tolerant I/O TIM3_CH1 DMA/Bi-DShot
S8 PWM8 GPIO57 5 V tolerant I/O TIM3_CH2 DMA/Bi-DShot
S9 PWM9 GPIO58 5 V tolerant I/O TIM4_CH1 DMA/DShot Group4
S10 PWM10 GPIO59 5 V tolerant I/O TIM4_CH2 DMA/DShot
S11 PWM11 GPIO60 5 V tolerant I/O TIM16_CH1 DMA/DShot Group5
PWM1~PWM11 are Dshot and PWM capable. However, mixing Dshot and normal PWM operation for outputs is restricted into groups,
ie. enabling Dshot for an output in a group requires that ALL outputs in that group be configured and used as Dshot, rather than PWM outputs.
If servo and motor are mixed in same group, make sure this group run lowest PWM frequency according to the servo specification.
That is to say. If Servo support Max. 50Hz, ESC must run at 50Hz in this group.
PINIO 9V switch GPIO81 RELAY1_PIN 81
ADC Vbat pad BATT_VOLTAGE_SENS 6~36V BATT_VOLT_PIN
BATT_VOLT_MULT		 10
21.0
 Curr pad BATT_CURRENT_SENS 0~3.3V BATT_CURR_PIN
BATT_AMP_PERVLT		 11
X
VB2 Pad BATT2_VOLTAGE_SENS 0~69V BATT2_VOLT_PIN
BATT2_VOLT_MULT		 18
21.0
CU2 Pad BATT2_CURRENT_SENS 0~3.3V BATT2_CURR_PIN
BATT2_AMP_PERVLT		 8
X
I2C SCL/SDA I2C3 5V tolerant I/O on board Baro SPL06-001 Address 0x76
Digital Airspeed I2C
MS4525
DLVR-L10D		 ARSPD_BUS
ARSPD_TYPE
ARSPD_TYPE		 0
1
9
Magnetometer COMPASS_AUTODEC 1
CAN C-H/C-L CAN2 5V tolerant I/O CAN CAN_D1_PROTOCOL
CAN_P1_DRIVER		 1
1
CAN GPS
CAN Compass
CAN Airspeed sensor		 GPS_TYPE
COMPASS_TYPEMASK
ARSPD_TYPE		 9
0
8
UART USB USB console SERIAL0_PROTOCOL 2
TX1 RX1 USART1 w/DMA 5 V tolerant I/O Telemetry SERIAL1_PROTOCOL 2
TX2 RX2 USART2 w/DMA 5 V tolerant I/O RC input/Receiver SERIAL2_PROTOCOL 23
TX3 RX3 USART3  w/DMA 5 V tolerant I/O GPS SERIAL3_PROTOCOL 5
TX4 RX4 UART4 w/o DMA 5 V tolerant I/O Spare SERIAL4_PROTOCOL -1
TX5 RX5 UART5 w/o DMA 5 V tolerant I/O Spare SERIAL5_PROTOCOL -1
TX6 RX6 USART6 w/o DMA 5 V tolerant I/O Spare SERIAL6_PROTOCOL -1

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.
  • RELAY1_FUNCTION   1
  • RELAY1_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.

 

 

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