ORBITH743

../_images/orbith743.jpg

The above image and some content courtesy of Orbit Technology-.

Specifications

Processor

  • STM32H743VIH6 (480MHz)

  • 256MB Flash for data logging

Sensors

  • InvenSense 2x ICM42688 IMU (accel, gyro)

  • DPS368 barometer

  • Voltage & Current sensor

Power

  • 2–6S LiPo input power

  • 5V 3A BEC for peripherals

  • 10V 3A BEC for video, GPIO controlled

Interfaces

  • USB Type-C port

  • 8x UARTs

  • 13x PWM outputs(one for serial LED by default) via two 8-pin ESC connectors and/or solder pads

  • 1x RC input (PWM/SBUS)

  • I2C port for external compass, airspeed sensor, etc.

  • HD VTX support

  • Dual switchable analog Camera inputs

  • 2x Power Monitor

  • Buzzer and LED strip

  • Built-in OSD

Size and Dimensions

  • 38.3 mm x 39.8 mm

  • 8.4 g

  • 30.5 mm x 30.5 mm mounting holes

Wiring Diagram

../_images/orbith743-wiring.jpg

UART Mapping

  • SERIAL0 = USB (MAVLink2)

  • SERIAL1 = UART1 (ESC Telemetry)

  • SERIAL2 = UART2 (USER)

  • SERIAL3 = UART3 (DJI HD Air Unit)

  • SERIAL4 = UART4 (VTX)

  • SERIAL5 = UART5 (RC Input)

  • SERIAL6 = UART6 (GPS)

  • SERIAL7 = UART7 (USER)

  • SERIAL8 = UART8 (USER)

All UARTs have DMA capability except UART 1

Wiring Diagram

../_images/orbith743-wiring.jpg

RC Input

RC input is configured by default on SERIAL5 (UART5). The 4V5 pin is powered by both USB and the onboard 5V BEC from the battery.

  • PPM is not supported. (PPM pin is not functional)

  • SBUS/DSM/SRXL connects to the RX5 pin.

  • FPort requires connection to TX5. Set SERIAL5_OPTIONS = 7

  • CRSF also requires both TX5 and RX5 connections and provides telemetry automatically.

Any UART can be used for RC system connections in ArduPilot. See the common RC systems documentation for details.

RSSI

Analog RSSI input is supported.

  • RSSI pin number: 8

  • Set RSSI_TYPE = 1 for analog RSSI, or = 3 for RSSI provided by RC protocols like CRSF.

OSD Support

The ORBITH743 has an onboard OSD using a MAX7456 chip and is enabled by default. The CAM1/2 and VTX pins provide connections for using the internal OSD. Simultaneous DisplayPort OSD is also possible and is configured by default.

DJI Video and OSD

An SH1.0 6P connector supports a standard HD VTX. SERIAL3 is configured by default for DisplayPort. Pin 1 provides 10V which is controlled by GPIO81 which is assigned to RELAY 2 by default. do not connect peripherals that cannot accept 10V to this pin.

DShot Capability

All motor outputs (M1–M8) support:

  • DShot

  • Bi-directional DShot (for BIDIR motors)

  • PWM

  • Mixing DShot and PWM within the same timer group is not allowed. Groups must be uniformly configured. Output timer groups are:

    1/2, 3/4, 5/6, 7/8.

  • Servo outputs (Outputs 9-12, marked S1–S4) on PA15, PB3, PD12, and PD13 (TIM2 and TIM4 timers) are PWM only. Output 13 (marked LED) is in a separate group and supports PWM/DShot or serial LED operation and is configured for serail LED operation by default.

GPIOs

ORBITH743 outputs can be used as GPIOs (relays, buttons, RPM, etc.). Set the SERVOx_FUNCTION = -1 to enable GPIO functionality.

GPIO Pin Mapping

  • PWM1 → 50

  • PWM2 → 51

  • PWM3 → 52

  • PWM4 → 53

  • PWM5 → 54

  • PWM6 → 55

  • PWM7 → 56

  • PWM8 → 57

  • PWM9 → 58

  • PWM10 → 59

  • PWM11 → 60

  • PWM12 → 61

  • LED → 62

  • BUZZER → 80

  • VTX PWR → 81 (internal)

  • CAM SW→ 82 (internal)

Camera Switch Control

GPIO 82 controls camera switching betweeen the CAM andd CAM2 inputs. Set high or low to toggle between analog camera inputs. RELAY3 is configured by default to control this GPO.

The “CC” pin is not functional.

Compass

This board does not include a compass. An external compass may be connected via the SCL/SA pins for autonomous features.

Battery Monitor

The autopilot can support up to two external analog battery monitors. The first monitor is enabled by default with these parameters:

Then reboot.

First battery monitor is enabled by default:

The second battery monitor is not enabled by default, but its parameter defaults have been set:

Where to Buy

Firmware

This board does not ship with ArduPilot pre-installed.

Follow this guide to load it for the first time.

Firmware can be found in ArduPilot firmware repo under the ORBITH743 sub-folder.