SIYI N7 User manual

N7 Autopilot User Manual (ArduPilot) v1.0
1
N7
AUTOPILOT
ARDUPILOT
USER MANUAL
V1.0
Nov 2023

N7 Autopilot User Manual (ArduPilot) v1.0
2
Thank you for purchasing SIYI product.
The N7 flight controller is equipped with the H7 double-precision floating-point unit
processor. It adopts built-in dual IMU redundancy and internal shock absorption
structure design, which endows the aircraft with high reliability. The N7 flight
controller is compatible with both ArduPilot and PX4 open-source ecosystem to
achieve abundant application scenarios and provide stable and comprehensive
systematic solutions for enthusiasts and industry application explorers of drones,
unmanned vehicles and ships, smart robots.
To ensure you a good experience of the product, please read this manual carefully.
If you encounter any issue using the product, please consult the manual or check
the online pages of this product on SIYI official website (https://siyi.biz/en). You can
also write an email to SIYI official A/S center ([e-mail]).

N7 Autopilot User Manual (ArduPilot) v1.0
3
SIYI User Group - Facebook
SIYI Official Website (https://siyi.biz/en/)
SIYI Official Store (https://shop.siyi.biz)
SIYI Official AliExpress Store (https://siyi.aliexpress.com)
SIYI YouTube Channel (https://www.youtube.com/c/SIYITech)

N7 Autopilot User Manual (ArduPilot) v1.0
4
User Manual Update Log
Version
Date
Updates
1.0
2023.11
Initial version.

N7 Autopilot User Manual (ArduPilot) v1.0
5
CONTENT
READ TIPS.................................................................................................................................................................7
Icons.........................................................................................................................................................................7
Safety.......................................................................................................................................................................7
Storage / Carrying / Recycling.............................................................................................................................9
1 INTRODUCTION..................................................................................................................................................11
1.1 Product Features...........................................................................................................................................11
1.2 Interface & Pinouts........................................................................................................................................13
1.3 Typical Connection Diagram .......................................................................................................................15
1.4 Technical Specifications...............................................................................................................................16
1.5 Packing List....................................................................................................................................................18
1.6 GPS Indicator Definition...............................................................................................................................19
2 FIRST TIME SETUP............................................................................................................................................20
2.1 Ground Control Station.................................................................................................................................20
2.2 Firmware Upgrade ........................................................................................................................................20
2.3 Mounting the Autopilot..................................................................................................................................25
2.3.1 Orientation...............................................................................................................................................25
2.3.2 Mounting the GPS Module...................................................................................................................25
2.3.3 Motor Order Diagrams...........................................................................................................................27
2.3.4 Vibration Damping.................................................................................................................................28
2.3.5 Magnetic Interference............................................................................................................................31
2.4 Mandatory Hardware Configuration ...........................................................................................................33
2.4.1 Basic System Overview........................................................................................................................33
2.4.2 Frame Class and Type Configuration.................................................................................................33
2.4.3 Motor Numbering and Direction...........................................................................................................34
2.4.4 Remote Controller Calibration..............................................................................................................34
2.4.5 Accelerometer Calibration....................................................................................................................38
2.4.6 Compass Calibration.............................................................................................................................41
2.4.7 Remote Controller Flight Mode Configuration...................................................................................43
2.4.8 Electronic Speed Controller (ESC) Calibration..................................................................................45
3 FIRST FLIGHT & TUNING..................................................................................................................................47
3.1 Pre-arm Safety Check..................................................................................................................................47

N7 Autopilot User Manual (ArduPilot) v1.0
6
3.2 Arming and Disarming..................................................................................................................................51
3.2.1 Arming the Motors..................................................................................................................................51
3.2.2 Disarming the Motors............................................................................................................................52
3.3 Getting Off the Ground –Tips for New Operators ...................................................................................54
3.3.1 First Flight................................................................................................................................................54
3.3.2 Tips for Your First Flights......................................................................................................................55
3.4 Measuring Vibration......................................................................................................................................57
3.4.1 Real-Time View in Ground Station......................................................................................................57
3.4.2 Vibe Dataflash Log Message...............................................................................................................58
3.5 Thrust Loss and Yaw Imbalance Warnings...............................................................................................61
3.5.1 Potential Thrust Loss.............................................................................................................................61
3.5.2 Yaw Imbalance.......................................................................................................................................62
4 ADVANCED CONFIGURATIONS .....................................................................................................................64
4.1 Power Module................................................................................................................................................64
4.2 Safety Switch.................................................................................................................................................66
4.3 Serial Port Configuration Options...............................................................................................................67
4.4 CAN Bus Setup..............................................................................................................................................68
4.5 Parameter Reset...........................................................................................................................................69
4.6 Common Parameters for N7 Autopilot.......................................................................................................70
4.7 Logs.................................................................................................................................................................72
5 After-sale Service.................................................................................................................................................74
5.1 Repair Service...............................................................................................................................................74
5.2 Warranty.........................................................................................................................................................75
5.2.1 7-Day Return & Refund.........................................................................................................................75
5.2.2 15-Day Replacement.............................................................................................................................76
5.2.3 1-Year Warranty Repair........................................................................................................................78

N7 Autopilot User Manual (ArduPilot) v1.0
7
READ TIPS
Icons
Please pay more attention to content indicated with the following marks:
DANGER Dangerous manipulation probably leads to personal injuries.
WARNING Warnings on manipulation possibly leads to personal injuries.
CAUTION Cautions on what manipulation may lead to economic losses.
Prohibited Mandatory Mark
Safety
N7 autopilot is designed and manufactured for professional application scenarios.
Operators need to have certain basic skills, so please use it with caution. SIYI
Technology does not assume any responsibility for any unnecessary product
damage caused by irregular or irresponsible operation of this product, economic
losses or even personal injury to the user or others. Minors must have professionals
present to supervise and guide minors when using this product. SIYI Technology's
products are designed for commercial use, and it is prohibited to use SIYI products
for military purposes. It is prohibited to disassemble or modify this product without
SIYI Technology's permission.

N7 Autopilot User Manual (ArduPilot) v1.0
8
To jointly maintain flight safety and allow you to better utilize the features of this
product, please pay special attention to the following matters:
It is prohibited to operate in crowded places (squares, parks, etc.), places with many
obstacles (streets, parking lots, etc.), places with strong magnetic fields or signal
interference sources (high-voltage lines, railway lines, radar stations, etc.) or other places
that may cause using SIYI products to control aircraft, vehicles or models in areas where
unnecessary economic losses or even personal injuries will occur.
During operation, never cover the remote controller antenna or otherwise block signal
transmission.
The top of the standard omni-directional antenna on the remote controller is the part
where signal transmission is weakest. Avoid pointing it at your aircraft, vehicle or model
while working.
It is prohibited to use SIYI products to control aircraft, vehicles, or models when you
are tired, drunk, or unwell.
Without special operation permission, it is prohibited to use SIYI products to control
aircraft, vehicles, or models in rainy days, at night or in strong wind environments.
When the engine or motor on your aircraft, vehicle or model is still running, do not cut
off the power to the remote controller in advance.
For flight safety, please keep the aircraft within sight when operating the aircraft.
When working, be sure to return to the main page from the system parameter setting
page.

N7 Autopilot User Manual (ArduPilot) v1.0
9
Before starting the operation, be sure to check the power of the remote controller and
the power supply voltage of the air unit.
When finishing the operation, first power off the air unit and then the remote controller.
Before setting the remote controller parameters, be sure to power off the engine and
motor to prevent accidental start.
Before starting the operation, be sure to pre-set the fail-safe function on the remote
control or in the ground station software.
When installing, please avoid installing the air unit and GPS module too close to avoid
interference. It is recommended that the distance between the air unit and the GPS module
be longer than 20 cm.
Storage / Carrying / Recycling
When the SIYI product you own is idle, or you want to take the SIYI product out for
work, or the product has reached the end of its service life, please pay special
attention to the following matters:
DANGER
When SIYI products are not in use, they should be kept away from areas easily accessible
to children.
Please avoid placing SIYI products in an environment that is too hot (above 60 degrees
Celsius) or too cold (below minus 20 degrees Celsius).

N7 Autopilot User Manual (ArduPilot) v1.0
10
CAUTION
Please avoid placing SIYI products in humid or sandy environments.
When carrying and transporting SIYI products, please avoid operations that may damage
components such as vibration or impact.

N7 Autopilot User Manual (ArduPilot) v1.0
11
1 INTRODUCTION
1.1 Product Features
Systematic Solution
The N7 flight control system supports a series of feature-rich SIYI products and
open-source ecosystem products to easily meet different application requirements.
Combine high-performance firmware and software including PX4, ArduPilot,
QGroundControl, and Mission Planner to support a wide range of application
scenarios and provide users with powerful systematic solutions. At the same time,
it lowers barriers to use, provides developers with a complete development platform,
and facilitates application development.
Internal Shock Absorption Structure
IMU and Magnetometer Dual Redundancy
IMU Thermostatic Control
The internal shock absorbing structure design of the N7 flight control can meet the
working requirements of multiple models. Built-in dual IMU redundancy design,
GPS module magnetometer and flight control board magnetometer dual
redundancy design, built-in heating resistors to ensure that the flight control IMU
can still work at a constant temperature in low temperature environments, and the
systematic comprehensive design greatly improves flight stability and reliability.
H7 Double Precision Floating Point Unit Processor

N7 Autopilot User Manual (ArduPilot) v1.0
12
The N7 flight controller is equipped with an STM32H743IIK6 processor, equipped
with a double-precision floating-point unit (DSP & FPU), up to 480 MHz main
frequency, 2 MB flash memory, and 1 MB memory, bringing powerful computing
capabilities, high-speed data processing capabilities, significantly improving flight
stability, and creating a broader space for functional development.

N7 Autopilot User Manual (ArduPilot) v1.0
13
1.2 Interface & Pinouts

N7 Autopilot User Manual (ArduPilot) v1.0
14

N7 Autopilot User Manual (ArduPilot) v1.0
15
1.3 Typical Connection Diagram

N7 Autopilot User Manual (ArduPilot) v1.0
16
1.4 Technical Specifications
Hardware
Main Processor
STM32H743IIK6
(32 Bit Arm® Cortex®-M7, 480 MHz, 2 MB memory, 1 MB
RAM)
Co-processor
STM32F103
(32 Bit Arm® Cortex®-M3, 72 MHz, 20 KB SRAM)
Sensors
Accelerometer / Gyro
BMI088 / ICM20689
Electronic Compass
IST8310
Barometer
MS5611
External Interface
UART Serial Port
4
I2C
3
CAN
1
PWM Output
8 x Standard PWM IO
5 x Programmable IO
RC Input (S.Bus)
1
Power Module Input
1
GPS & Safety
1
USB (Type-C)
1
TF Card Slot
1
Overall
Compatible Model
PX4 / ArduPilot Firmware
(Planes / Multirotors / Helicopters / VTOL / UGV / USV)
Power Module Voltage
Input
4.5 ~ 5.5 V

N7 Autopilot User Manual (ArduPilot) v1.0
17
USB Voltage Input
5 V (±0.25 V)
Servo Voltage Input
0 ~ 10 V
Working Temperature
-20 ~ 65 ℃
Dimensions
47 x 68 x 19 mm
Weight
57 g
Mark
To make sure your flight log is recorded smoothly and stably, please format your SD card
to FAT32 format and make the minimum storage unit as 64 KB.
The default firmware for N7 autopilot is ArduCopter v4.3.7.
To have a stable flight, please assign the external compass as main compass.

N7 Autopilot User Manual (ArduPilot) v1.0
18
1.5 Packing List
Basic Combo
GPS Combo
1 x N7 Autopilot
1 x Power Module
1 x M9N GPS
2 x I2C / CAN Cable
1 x TELEM1 Cable
1 x S.Bus Cable
1 x TELEM4 to I2C Cable
1 x SIYI Gimbal to PX4 / ArduPilot Flight Controller UART Cable
(Connect SIYI gimbal’s UART port to PX4 / ArduPilot flight controller’s UART port for
communication and gimbal control)
1 x USB to Type-C Cable
(Connect flight controller to PC for firmware upgrade and configuration)
3 x 3M Double-Sided Tape (4 x 2 cm)
(Fix and mount N7 autopilot)

N7 Autopilot User Manual (ArduPilot) v1.0
19
1.6 GPS Indicator Definition
Red-Blue Blinks: Initialing (Gyro calibrating, etc.)
Red-Green-Blue Blinks: Saving configuration / Compass calibrating / ESC
calibrating.
Red-Yellow Blinks: Kalman filter failsafe.
Blue-Yellow Blinks: GPS fail.
Fast Yellow Blinks: Radio / GCS / Batt failsafe.
Solid Green: Armed - GPS 3D Fix
Solid Blue: Armed - No GPS positioning.
Double Yellow Blinks: Disarmed - Arm check failed.
Fast Green Blinks: Disarmed - DGPS Fix
Slow Green Blinks: Disarmed - GPS Fix
Slow Blue Blinks: Disarmed: No GPS positioning.

N7 Autopilot User Manual (ArduPilot) v1.0
20
2 FIRST TIME SETUP
If you are new to ArduPilot, welcome to visit the official ArduPilot documentation for
step-by-step instructions.
ArduPilot Official Documentation
https://ardupilot.org/copter/docs/copter-introduction.html#
2.1 Ground Control Station
Ground Control Station (GCS) software provides a means to configure your
autopilot system as well as providing an in-flight means of monitoring and controlling
all aspects of the vehicle operation.
Mark
It is suggested to configure ArduPilot flight controller in Windows Mission Planner.
Download Mission Planner:
https://firmware.ardupilot.org/Tools/MissionPlanner/MissionPlanner-latest.msi
2.2 Firmware Upgrade
ArduPilot flight controller firmware can be upgraded through Mission Planner GCS.