ArduPilot SITL setup in Drone Programming - Mini Project: Build & Apply

ArduPilot SITL Setup

📖 Scenario: You want to test your drone flight code safely on your computer before flying a real drone. ArduPilot SITL (Software In The Loop) lets you run a virtual drone simulator that behaves like a real drone.This project will guide you step-by-step to set up ArduPilot SITL on your computer and run a simple simulation.

🎯 Goal: Set up ArduPilot SITL environment, configure a basic drone model, start the SITL simulation, and see the drone's status output.

📋 What You'll Learn

Install Python 3.12+

Install necessary SITL dependencies

Download ArduPilot source code

Run SITL simulation and view output

💡 Why This Matters

🌍 Real World

Testing drone flight code safely on your computer before flying a real drone helps avoid crashes and saves time.

💼 Career

Drone developers and researchers use SITL to develop and test drone software efficiently without risking hardware.

1

Download ArduPilot source code

Use the command git clone https://github.com/ArduPilot/ardupilot.git to download the ArduPilot source code folder named ardupilot to your computer.

Drone Programming

# Run the git clone command below
# Your code here

Hint

Open your terminal or command prompt and type the exact git clone command to download the code.

2

Install SITL dependencies

Inside the ardupilot folder, run the command Tools/environment_install/install-prereqs-ubuntu.sh -y to install all required dependencies for SITL on Ubuntu Linux.

Drone Programming

git clone https://github.com/ArduPilot/ardupilot.git
# Run the dependency install script below
# Your code here

Hint

Make sure you change directory into ardupilot before running the install script.

3

Build and start SITL simulation

Run the commands cd ardupilot/ArduCopter and then ../waf configure --board sitl followed by ../waf copter to build the SITL simulator. Then start SITL with ../waf --target bin/arducopter.

Drone Programming

git clone https://github.com/ArduPilot/ardupilot.git
cd ardupilot
Tools/environment_install/install-prereqs-ubuntu.sh -y
# Build and start SITL below
# Your code here

Hint

Follow the exact commands to build and run the SITL simulator for the copter model.

4

View SITL simulation output

Run ../Tools/autotest/sim_vehicle.py -v ArduCopter -f quad --console --map inside the ardupilot folder to start the SITL simulation with a console and map window. Then observe the output showing the drone's status.

Drone Programming

git clone https://github.com/ArduPilot/ardupilot.git
cd ardupilot
Tools/environment_install/install-prereqs-ubuntu.sh -y
cd ArduCopter
../waf configure --board sitl
../waf copter
../waf --target bin/arducopter
# Start SITL simulation with console and map
# Your code here

Hint

This command launches the SITL simulation with a console and map to see the drone's status live.

Practice

1. What is the main purpose of using ArduPilot SITL in drone programming?

easy

A. To simulate drone flights on a computer without real hardware

B. To control a real drone remotely

C. To build physical drone parts

D. To write drone flight manuals

Solution

1. Step 1: Understand what SITL means

   SITL stands for Software In The Loop, which means running drone software on a computer instead of a real drone.

2. Step 2: Identify the purpose of simulation

   Simulation lets you test and control drone behavior safely without risking hardware damage.

3. Final Answer:

   To simulate drone flights on a computer without real hardware -> Option A

4. Quick Check:

   Simulation = Safe drone testing on computer [OK]

Hint: SITL means simulating drones on your computer [OK]

Common Mistakes:

• Thinking SITL controls real drones directly
• Confusing simulation with hardware building
• Assuming SITL is for documentation only

2. Which command correctly starts a quadcopter simulation using ArduPilot SITL?

easy

A. sim_vehicle.py -v Boat

B. sim_vehicle.py -v ArduCopter

C. sim_vehicle.py -v Rover

D. sim_vehicle.py -v Plane

Solution

1. Step 1: Identify the vehicle type for a quadcopter

   ArduCopter is the vehicle type used for quadcopters in ArduPilot SITL.

2. Step 2: Match the command with the vehicle type

   The command sim_vehicle.py -v ArduCopter starts the quadcopter simulation correctly.

3. Final Answer:

   sim_vehicle.py -v ArduCopter -> Option B

4. Quick Check:

   Quadcopter = ArduCopter option [OK]

Hint: Use -v ArduCopter to simulate a quadcopter [OK]

Common Mistakes:

• Using Plane or Rover for quadcopter simulation
• Omitting the -v option
• Typing vehicle names incorrectly

3. What output will you see after running sim_vehicle.py -v ArduPlane successfully?

medium

A. A real drone takes off automatically

B. An error message about unknown vehicle type

C. A simulated plane starts with console showing telemetry and a map window

D. The program exits without any output

Solution

1. Step 1: Understand what sim_vehicle.py does with ArduPlane

   It launches a plane simulation showing telemetry data in the console and a map window for visualization.

2. Step 2: Identify expected output

   You should see the simulation start with console messages and a map, not errors or real drone actions.

3. Final Answer:

   A simulated plane starts with console showing telemetry and a map window -> Option C

4. Quick Check:

   ArduPlane simulation = console + map output [OK]

Hint: Successful sim_vehicle.py shows console and map [OK]

Common Mistakes:

• Expecting real drone flight
• Confusing vehicle types causing errors
• Thinking no output means success

4. You run sim_vehicle.py -v ArduCopter but get an error: command not found. What is the likely cause?

medium

A. The sim_vehicle.py script is not installed or not in your PATH

B. You typed the vehicle type incorrectly

C. Your computer does not support simulation

D. You need to connect a real drone first

Solution

1. Step 1: Analyze the error message

   The error 'command not found' means the system cannot find the sim_vehicle.py script to run.

2. Step 2: Identify common causes

   This usually happens if the script is not installed or its folder is not added to the system PATH environment variable.

3. Final Answer:

   The sim_vehicle.py script is not installed or not in your PATH -> Option A

4. Quick Check:

   Command not found = missing script or PATH [OK]

Hint: Check if sim_vehicle.py is installed and in PATH [OK]

Common Mistakes:

• Assuming vehicle type typo causes command not found
• Thinking hardware is required to run simulation
• Ignoring environment PATH settings

5. You want to simulate a drone mission using ArduPilot SITL and automatically log telemetry data. Which command option should you add to sim_vehicle.py to enable logging?

hard

A. -g

B. --log

C. --enable-logs

D. -l

Solution

1. Step 1: Recall sim_vehicle.py logging options

   The standard option to enable logging in sim_vehicle.py is -l, which starts telemetry logging automatically.

2. Step 2: Compare options

   Options like --log or --enable-logs are not recognized by sim_vehicle.py, and -g is unrelated.

3. Final Answer:

   -l -> Option D

4. Quick Check:

   Logging option = -l [OK]

Hint: Use -l to enable logging in sim_vehicle.py [OK]

Common Mistakes:

• Using long options not supported by sim_vehicle.py
• Confusing logging with other flags
• Forgetting to add any logging option