Interfacing SG90 Servo Motor with ESP32

In this tutorial, we will learn how to interface an SG90 servo motor with an ESP32 microcontroller. The SG90 is a popular micro servo motor used in various DIY electronics projects due to its compact size and ease of use. The ESP32 is a powerful microcontroller with built-in Wi-Fi and Bluetooth capabilities, making it suitable for IoT applications.

Components Required:

- ESP32 Development Board
- SG90 Servo Motor
- Breadboard
- Jumper Wires
- Micro USB Cable

August 8, 2023

ESP32 Node MCU Development Board with Wifi and Bluetooth (CP2102 Driver, 30 PIN)

3 pole ferrite, all nylon gear
Top ball bearing
Operating Voltage: 4.8V~6.0V
Operating speed: 0.12sec/60 degree
Output torque: 1.6kg/cm 4.8V
Dimension: 21.5 x 11.8 x 22.7mm
Weight: 9g

August 10, 2023

Tower Pro SG90 Servo – 9 gms Mini/Micro Servo Motor

400 tie points
1 Double strip, Total 300 tie points
2 Power lanes, Total 100 tie points in power lanes
Perfect for Arduino shield prototyping and testing
Plastic housing, metal contact clips

August 28, 2023

400 Points Half Size Solderless Breadboard

Tie-Points
170Material
ABSMounting Holes
M2Length (mm)
48Width (mm)
35Height (mm)
9Weight (gm)
14

August 28, 2023

170 Points Mini Breadboard SYB-170 Yellow

40P color jumper wires
Length: 200mm
Weight: 45 gm
Compatible with 2.54mm spacing pin headers
High quality and in good working condition
Durable and reusable
Easy to install and use

August 18, 2023

Male to Male Jumper Wire 40pin – 20cm Length

Length 1 m
Round Cable
Connector One: Micro-USB|Connector Two: Usb
Cable Speed: 50 Mbps

August 26, 2023

ELECTROLINE M12 Micro USB Cable for ESP32/NodeMCU -1 Meter

Step-by-Step Guide

1. Understanding the SG90 Servo Motor

The SG90 servo motor has three wires:

- Brown: Ground (GND)
- Red: Power (VCC)
- Orange: Signal (PWM control)

The servo motor operates on 5V power and uses Pulse Width Modulation (PWM) to control the angle of the motor shaft.

2. Wiring the Components

Connect the servo motor to the ESP32 as follows:

- GND: Connect the brown wire of the servo to a GND pin on the ESP32.
- VCC: Connect the red wire of the servo to the 5V (VIN) pin of the ESP32.
- Signal: Connect the orange wire of the servo to a PWM-capable GPIO pin on the ESP32 (e.g., GPIO 4).

3. Setting Up the Software

We will use the Arduino IDE to program the ESP32. Ensure you have the ESP32 board package installed in your Arduino IDE. If not, you can install it by following these steps:

1. Open Arduino IDE 2.
2. Open the Library Manager, search for ServoESP32Fix by alunit3, and install it.
3. Open File > Examples > ServoESP32Fix > 01-SimpleServo.

This code sweeps the servo motor back and forth between 0 and 180 degrees. The Servo library simplifies the control of the servo motor by abstracting the PWM signals.

5. Uploading the Code

1. Connect the ESP32 to your computer via USB.
2. Select the correct board and port in the Arduino IDE: Tools > Board > ESP32 Dev Module and Tools > Port > (your ESP32 port).
3. Click the Upload button to compile and upload the code to the ESP32.

6. Testing

Once the code is uploaded, the servo motor should start sweeping back and forth.

Conclusion

Interfacing an SG90 servo motor with an ESP32 is straightforward using the Servo library and PWM pins. This setup can be extended to more complex projects involving remote control and automation. Happy experimenting!

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