Documentation
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Atlas Control

Quick Start

This section covers how to power the controller and connect its main peripherals. Exact pin numbers for every connector are in the Pinout section.

What goes where

ConnectorWhat to connect
POWER AAnalog power module. Measures voltage and current through the ADC. Do not connect a digital module here.
POWER CDroneCAN power module. This is the default option.
GPS & SAFETYGPS module. The connector combines GPS, I2C1, safety switch and buzzer.
SERIAL4 (UART4 / I2C2)Second GPS or other UART/I2C peripherals.
TELEM1 / TELEM2 / TELEM3Telemetry radios.
CAN1 / CAN2DroneCAN devices: GPS, power modules, servos.
I2C1 – I2C4External compass, airspeed sensor, rangefinder.
RC INRC receiver. Also SERIAL5 (UART8).
M1 – M14Motors and servos.
USB-CConnection to a computer for setup and firmware loading.
DEBUG & UART7System console and SWD. Not needed in normal use.
ADC / RSSIAnalog inputs and receiver signal strength.
microSDLog storage card. Fitted at the factory.

1. Board orientation

Mount the controller with its arrow pointing forward, along the direction of flight. Sensor rotation is handled in firmware, so AHRS_ORIENTATION does not need changing.

If that is not possible
When the board cannot be mounted in its default position, set the actual orientation with the AHRS_ORIENTATION parameter.

2. Power

Connect the power module to POWER C if it is DroneCAN, or to POWER A if it is analog. The board can also run from USB, which is enough for bench setup but not for flight.

The board is not powered by the servo rail
The servo rail is isolated. Without power on POWER A, POWER C or USB the controller will not turn on.

3. GPS and compass

The recommended option is a DroneCAN GPS on CAN1 or CAN2. A conventional GPS connects to GPS & SAFETY, which already carries the compass lines (I2C1), the safety switch and the buzzer.

Mount the GPS on a mast, away from power cables, with its arrow pointing the same way as the controller's arrow.

About the compass
The board has an internal RM3100 compass. Since the controller usually sits inside the airframe where the magnetic field is distorted, the external compass in the GPS module should normally be the primary one.

4. Safety switch and buzzer

Both are part of the GPS & SAFETY connector. If your GPS module has a built-in switch and buzzer, no separate parts are needed.

When flying without GPS, the switch still connects to the same port — the vehicle will not arm without it.

5. Radio control

The receiver connects to the RC IN contact on the servo rail. All unidirectional ArduPilot protocols are supported: SBUS, CPPM, DSM.

CRSF, ELRS, FPort and SRXL2 require a UART. See the Configuration section for the settings.

6. Telemetry

Connect the air-side radio to TELEM1 or TELEM2 — these support hardware flow control. TELEM3 suits additional devices.

7. Memory card

The microSD card for logs is fitted at the factory; nothing needs to be done.

8. Motors and servos

Connect ESCs and servos to outputs M1 – M14 in the order ArduPilot defines for your vehicle type.

Servo power
The servo rail is fully isolated from the controller's internal supply, and the controller does not power it. To power servos, connect a BEC to any plus/minus pair on outputs M1 – M14. Maximum 10 V.