LILYGO T-RS S3 ESP32-S3 RS232 RS485 Module is a robust, industrial-grade communication development board built around the dual-core ESP32-S3 XTensa LX7 MCU ⚙️. Featuring 8MB flash memory 💾, integrated Wi-Fi 📶 and Bluetooth 5.0 🔗, and a wide input voltage range (DC 7V~24V), this board is ideal for industrial IoT 🏭, automation systems 🤖, and serial bus applications 🔌.
🔗 Interfaces & Communication
Equipped with both RS232 (RSM232MT5V) and RS485 (RSM485MT5V) interfaces, the LILYGO T-RS S3 supports full-duplex high-speed transmission from 1200 to 256000bps 🚀, and offers 3000V isolation protection 🛡️ for safe and stable data exchange in noisy environments.
🧰 Development & Integration
Compatible with Arduino, ESP-IDF, and VS Code, this module is easy to integrate into Modbus RTU systems, PLC interfaces, and data acquisition platforms. Onboard features include WS2812 LED support 🌈, Reset/Boot/IO2 buttons 🔘, and a compact TTL to RS232/RS485 converter—all in one streamlined form factor.
💡 Use Cases
- Industrial control panels
- Remote sensor gateways
- Smart factory automation
- Serial device monitoring
- Modbus RTU/ASCII integration
📐 Specifications
| MCU | ESP32-S3 dual-core XTensa LX7 |
| Wireless | Wi-Fi / Bluetooth 5 (LE) |
| Flash | 8MB |
| Programming Platform | Arduino, ESP-IDF |
| Onboard Functions | WS2812 (GPIO1) |
| Buttons | Reset + Boot (GPIO0) + IO2 |
| Power Input | DC 7V~24V, RS232 DB9 female connector |
🔌 RS232 Module (RSM232MT5V)
| Module Name | RSM232MT5V |
| Port | TTL/RS232 |
| Isolation Voltage | 3000V |
| Isolation Output | 5V / 50mA (0.5W) |
| Communication Rate | 1200 ~ 256000bps |
🔌 RS485 Module (RSM485MT5V)
| Module Name | RSM485MT5V |
| Port | TTL/RS485 |
| Isolation Voltage | 3000V |
| Isolation Output | 5V / 50mA (0.5W) |
| Communication Rate | 1200 ~ 256000bps |
💻 Sample Code [Github]
If you need technical support, please check the link below for more details.
T-RS S3
🖼️ Product Display
📏 Size
📌 Pin Diagram