How to Control a Servo Using a Slider on a Web Server with NodeMCU
Here’s a step-by-step guide to control a servo motor using a slider on a web server with NodeMCU
Description:
In this tutorial, we'll show you how to control a servo motor using a slider on a web server hosted by a NodeMCU. This project combines IoT and web technologies to allow you to control the servo's position from any device with a web browser. Let's get started!
Materials Needed
- NodeMCU (ESP8266)
- Servo Motor (e.g., SG90)
- Breadboard and jumper wires
- Power supply (e.g., USB cable for NodeMCU)
- Micro USB cable
- Computer with Arduino IDE installed
Step 1: Set Up the Arduino IDE
1. Install the ESP8266 Board:
- Open Arduino IDE.
- Go to `File` > `Preferences`.
- In the "Additional Board Manager URLs" field, add: `http://arduino.esp8266.com/stable/package_esp8266com_index.json`.
- Go to `Tools` > `Board` > `Boards Manager`.
- Search for `ESP8266` and click "Install".
2. Install Required Libraries:
- Go to `Sketch` > `Include Library` > `Manage Libraries`.
- Search for `ESP8266WiFi` and install it.
- Search for `Servo` and install it.
Step 2: Connect the Servo Motor to NodeMCU
1. Connections:
- Connect the servo motor's power pin (usually red) to the 3.3V pin on the NodeMCU.
- Connect the ground pin (usually black or brown) to the GND pin on the NodeMCU.
- Connect the signal pin (usually yellow or white) to the D1 (GPIO 5) pin on the NodeMCU.
Step 3: Write the Code
1. Create the Web Server Code:
2. Upload the Code:
- Select your board and port from `Tools` > `Board` > `NodeMCU 1.0 (ESP-12E Module)` and `Tools` > `Port`.
- Click the upload button to flash the code to the NodeMCU.
Step 4: Test the Project
1. Connect to the Web Server:
- Open the Serial Monitor in Arduino IDE (set baud rate to 115200) to see the IP address assigned to your NodeMCU by your WiFi network.
- Open a web browser and enter the IP address in the address bar.
2. Control the Servo:
- You should see a slider on the webpage. Move the slider to control the servo's position.
- The servo should move according to the slider value, allowing you to control its angle from 0 to 180 degrees.
Project Gallery
Video Tutorial :
Conclusion :
You have successfully created a web server on the NodeMCU to control a servo motor using a slider. This project demonstrates the power of combining IoT and web technologies for remote control applications. Explore more projects and continue enhancing your skills with EmbeddedBrew!