Index
ESP32 Web Server using Server-Sent Events:
This tutorial demonstrates how to implement Server-Sent Events (SSE) in an ESP32 Web Server using Arduino IDE. SSE enables the browser to receive automatic updates from a server via an HTTP connection. It’s particularly handy for sending updated sensor readings to the browser. Whenever a new reading is available, the ESP32 sends it to the client, and the web page can be automatically updated without requiring additional requests.
Introducing Server-Sent Events (SSE)
Server-Sent Events (SSE) enable the client to receive automatic updates from a server via an HTTP connection.
The client establishes the SSE connection, and the server utilizes the event source protocol to send updates to the client. While the client can receive updates from the server, it cannot send any data back after the initial handshake.
This functionality proves handy for transmitting updated sensor readings to the browser. Whenever there’s a new reading available, the ESP32 dispatches it to the client, allowing the web page to refresh automatically without the need for additional requests. You can leverage SSE to transmit various data types relevant to your project, such as GPIO states or notifications for detected motion.
Note: Server-Sent Events (SSE) aren’t compatible with Internet Explorer.
Applications of SSE:
- Real-Time Updates:
- Social media feeds
- Live sports scores
- Stock market updates
- Chat applications
- IoT and Sensor Data:
- Environmental sensor readings (temperature, humidity)
- Motion detection events
- Smart device status updates
- Notifications and Alerts:
- New emails
- Social media mentions
- System status updates
- Emergency alerts
Advantages of SSE:
- Real-Time Updates:
- Enhanced user experience
- Reduced server load
- IoT and Sensor Data:
- Real-time monitoring and control
- Automated actions based on sensor readings
- Notifications and Alerts:
- Instant notifications to users
- Timely information delivery
