Birth of a Little Flyer

Overview

Welcome to your first drone project! In this tutorial, you’ll build a fully functional ESP32 drone from scratch and complete your first flight.

What You’ll Learn

• Drone frame assembly
• Motor and ESC connection
• ESP32 firmware flashing
• Basic flight controls
• Safety procedures

Materials Needed

Item	Quantity	Notes
ESP32-S3-DevKitC Board	1	Main flight controller
715 Brushed Motors	4	2 CW, 2 CCW
MPU6050 Attitude Sensor	1	Measures drone attitude
LiPo Battery 1S 3.7V	1	300-500mAh
PCB Frame	1	Use PCB directly as frame
ESCs	4	Or use ESP32 PWM directly
USB Cable	1	For programming

Step 1: Frame Assembly

1.1 Attach Motor Mounts

1. Mount motors to the four corners of the PCB frame, tighten with screws
2. Important: Note the motor rotation direction (CW vs CCW)

Motor Layout (Top View):
    Front
     ↑
  1     2  (1,3 = CW | 2,4 = CCW)
   \   /
    \ /
    / \
   /   \
  4     3

1.2 Install Flight Controller

Mount the ESP32 board in the center of the frame using double-sided tape or standoffs.

Step 2: Wiring

2.1 Motor Connections

Connect each motor to the corresponding GPIO pins:

Motor	GPIO Pin	Rotation
M1	GPIO 4	CW
M2	GPIO 5	CCW
M3	GPIO 6	CCW
M4	GPIO 7	CW

2.2 Sensor Connections

Connect the MPU6050 attitude sensor to ESP32 I2C interface:

• MPU6050 SCL → ESP32 GPIO 22
• MPU6050 SDA → ESP32 GPIO 21

2.3 Power Connection

Connect the battery to the ESP32 power interface through a power switch.

Step 3: Firmware Flashing

3.1 Prepare Flashing Tool

1. Download flash_tool.exe (Windows) or flash_tool_mac.app (macOS)
2. Download takeoff.bin file to your computer desktop

3.2 Flash the Firmware

1. Hold the “BOOT” button on the ESP32 board while connecting the USB cable to your computer
2. Open flash_tool.exe and select the takeoff.bin file
3. Click the “Flash” button and wait for completion (about 10 seconds)
4. After the tool shows “Flash successful”, remove the USB cable

Step 4: First Flight

4.1 Pre-flight Checklist

• Battery fully charged
• Propellers securely attached
• No loose wires
• Firmware flashed successfully
• Choose an open flight area

4.2 Using the Mobile App

1. Download Drone Control APP (Android) or search “ESP Drone” in App Store (iOS)
2. Power on the drone (battery switch), the drone LED will blink
3. Connect your phone to the drone’s Wi-Fi (Name: ESP-Drone, Password: 12345678)
4. Open the APP and wait for connection

4.3 Takeoff

1. Click the “Takeoff” button in the APP
2. Slowly push the throttle slider, and the drone will fly!
3. Try controlling the drone to move forward, backward, left and right
4. Slowly lower the throttle to let it land

Safety First: Always fly in open areas away from people and obstacles.

Troubleshooting

Drone won’t arm

• Check battery voltage (>3.5V)
• Verify wireless connection
• Ensure level surface for calibration

Drone flips on takeoff

• Check propeller direction
• Verify motor order matches configuration
• Check gyro calibration

Achievement

Congratulations! Your hand-assembled drone is flying! This is an exciting milestone, and you’ve taken the first step to becoming a drone expert.

Next Steps

In the next project, you’ll learn how to change different sound effects and LED effects for your drone, creating your own personalized aircraft.