This project transforms the CrowPanel ESP32-S3 5" display into a real-time temperature and humidity monitor with a polished LVGL user interface. It combines RS485 Modbus communication, built-in RTC clock, Wi-Fi synchronization, and interactive UI controls creating a compact yet feature-rich smart panel.

The ESP32-S3 reads data from an RS485 Modbus sensor (XYMD02) and updates the screen every second. The CrowPanel’s integrated RTC displays the current time, and when Wi-Fi is available, it automatically synchronizes the clock via NTP, ensuring the displayed time is always accurate without manual adjustment.

A slider widget on the UI allows users to control the screen brightness smoothly, while a Log tab provides real-time system feedback, showing Wi-Fi connection status, sensor availability, and alerts if the RS485 sensor disconnects or fails to respond.

All wiring details and setup steps are clearly shown in the YouTube tutorial linked with this project, making it easy for anyone to follow along.

This open-source project can be extended with data logging, cloud monitoring, or multiple Modbus devices. With its blend of industrial reliability and modern UX, it’s an excellent example of how ESP32-S3 and LVGL can work together to create a professional, connected, and visually engaging monitoring dashboard.