LILYGO T-Connect Pro is a DIN rail-mountable, ESP32-S3-based industrial IoT controller with Ethernet, WiFi 4, Bluetooth 5.0 LE, and LoRa connectivity, as well as CAN Bus, RS232, and RS485 interfaces.
The controller also features a 2.33-inch touchscreen display, a 10A relay, a 12V to 24V DC screw terminal for power, 5V USB-C port for programming, a Qwiic connector for expansion, and BOOT and Reset buttons.
- SoC – Espressif ESP32-S3R8
- CPU – Dual-core Tensilica LX7 microcontroller up to 240 MHz with vector instructions for AI acceleration
- Memory – 8MB PSRAM
- Wireless – WiFi 4 and Bluetooth 5.0 LE + Mesh connectivity
- Storage – 16MB SPI flash
- Display – 2.33-inch RGB display with 480×222 resolution via ST7796 SPI display controller with touchscreen using CST226SE chip
- Networking
- 10/100Mbps Ethernet RJ45 port via W5500 4-wire SPI controller
- WiFi 4 and Bluetooth 5.0 LE via ESP32-S3
- LoRa via HPD16A Semtech SX1262 module (Bands: 433, 868, 915, 920MHz) and external antenna
- USB – USB Type-C port for power and programming
- Serial
- RS232 UART module (TD501D232H)
- RS485 UART module (TD501D485H-A)
- CAN Bus I2C module (TD501MCANFD); isolation voltage: 2500V
- Relay – 10A output relay
- Expansion – Qwiic connector
- Misc – BOOT and Reset buttons
- Power Supply
- 12 to 24V DC input
- 5V/500mA via USB port
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Dimensions – 88 x 72 x 25mm; 4x M3 mounting thread
- Weight – 240 grams
LILYGO provides Arduino code samples for all features, including a factory test sketch on GitHub, where you’ll also find basic instructions to get started with PlatformIO + VS Code or the Arduino IDE, and the PDF schematics.
We have written about plenty of ESP32 IoT controllers over the years, but the LILYGO T-Connect Pro’s design reminds me of the NORVI ENET DIN Rail ESP32 industrial controller with a similar shape, a touchscreen display, the same wired and wireless connectivity option (Ethernet, WiFi, BLE, LoRa), etc… However, the new LILYGO device features a more recent ESP32-S3 microcontroller, a larger display, CAN Bus, RS232 and RS485, although it lacks analog inputs, digital outputs, and only offers one 10A relay.
Another advantage is that it’s also cheaper since it’s made in China. The T-Connect Pro is sold for $89.98 on AliExpress including shipping, $78 on Amazon, and you’ll also find it on the company’s online store for $70.36 plus shipping.
Jean-Luc started CNX Software in 2010 as a part-time endeavor, before quitting his job as a software engineering manager, and starting to write daily news, and reviews full time later in 2011.
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