💻 Introduction to Programming

🎯 Lesson Objective

In this lesson, students will understand:

• What programming is
• Why programming is important in robotics
• How programs control electronic systems
• The relationship between hardware and software
• How programming enables robots to perform tasks

This lesson introduces the basic concept of programming, which is essential for controlling robots and electronic systems.

1️⃣ What is Programming?

Programming is the process of writing instructions that a computer or microcontroller can understand and execute.

These instructions are written in a programming language, which allows humans to communicate with machines.

A program tells the machine:

• What actions to perform
• When to perform them
• How to respond to different situations

For example, in robotics programming we might write instructions such as:

• Turn a motor on
• Read a sensor value
• Wait for a certain amount of time
• Change direction when an obstacle is detected

These instructions together form a program that controls the robot’s behavior.

2️⃣ Programming in Robotics

In robotics, programming allows us to control how the robot behaves.

The program running inside the microcontroller decides:

🔎 How the robot reads sensor data
⚙️ How the robot moves
📡 How the robot communicates with other devices
🤖 How the robot reacts to its environment

Without programming, electronic components would not know how to work together.

For example:

In an obstacle avoiding robot:

1️⃣ The ultrasonic sensor measures the distance to an object.
2️⃣ The microcontroller reads the sensor value.
3️⃣ The program checks if the object is too close.
4️⃣ The program tells the motors to change direction.

This entire process is controlled by a program written by the developer.

3️⃣ Hardware and Software in Robotics

Robotics systems are built using two main parts:

🔧 Hardware

Hardware includes the physical components of the robot.

Examples include:

• ESP32 microcontroller
• Sensors
• Motors
• Motor drivers
• Batteries

These components form the physical structure of the robot.

💻 Software

Software refers to the program that runs on the microcontroller.

The software tells the hardware:

• When to activate sensors
• How to control motors
• How to respond to inputs

Without software, hardware cannot perform meaningful tasks.

Robotics systems work by combining hardware and software together.

4️⃣ Programming Languages in Robotics

There are many programming languages used in robotics and embedded systems.

Some common languages include:

• C / C++
• Python
• Java
• MATLAB

In this course, we will use Arduino programming language, which is based on C/C++.

Arduino programming is widely used in robotics because it is:

✔ Simple and beginner-friendly
✔ Easy to understand
✔ Well supported with libraries and examples

This makes it ideal for students who are learning robotics for the first time.

5️⃣ How Programs Run in a Microcontroller

When we write a program in Arduino IDE and upload it to the ESP32, the program is stored inside the microcontroller’s memory.

Once the ESP32 is powered on:

1️⃣ The microcontroller reads the program stored in memory.
2️⃣ It begins executing the instructions step by step.
3️⃣ The instructions control the sensors, motors, and other devices.

The program continues running as long as the microcontroller has power.

This allows the robot to perform tasks automatically.

6️⃣ Why Programming Skills Are Important

Programming is one of the most important skills in robotics development.

With programming knowledge, you can:

💻 Control electronic devices
🤖 Build intelligent robots
⚙️ Design automation systems
📡 Develop IoT applications

Learning programming allows you to transform simple electronic components into smart and interactive systems.

🚀 What Happens Next

Now that you understand what programming is and why it is important in robotics, the next step is to learn how microcontrollers execute programs.