---
title: "LILYGO T-Connect Pro"
url: "https://maker.wiznet.io/scott/resellers/lilygo-t-connect-pro/"
markdown_url: "https://maker.wiznet.io/scott/resellers/lilygo-t-connect-pro/md"
type: "VAR: Value-Added Reseller Products"
author: "LILYGO"
author_url: "https://lilygo.cc/products/t-connect-pro/"
editor: "WIZnet"
editor_url: "https://maker.wiznet.io/"
original_author: "LILYGO"
original_url: "https://lilygo.cc/products/t-connect-pro/"
published: "2025-10-29"
language: "en"
likes: 0
views: 618
comments: 0
source: "WIZnet Makers (https://maker.wiznet.io/)"
---

# LILYGO T-Connect Pro

> Support 2.4Ghz Wi-Fi Bluetooth 5 (LE) and LoRa

Original author: LILYGO (source: https://lilygo.cc/products/t-connect-pro/)

## Documents and links

- [Github](https://github.com/Xinyuan-LilyGO/T-Connect-Pro) (code)

## Article

The **LILYGO T-Connect Pro** is not just another development board. Built around the **ESP32-S3R8 dual-core MCU**, it integrates all major communication interfaces required for modern industrial IoT — **Ethernet, CAN, RS232, RS485, LoRa, Wi-Fi, and Bluetooth** — into a single board. With **DIN rail mounting** and **12–24 V DC input support**, it can be directly installed in control panels or industrial equipment environments.

---

## **Key Specifications**

| **Item** | **Specification** |
| --- | --- |
| **Processor** | ESP32-S3R8 (240 MHz, Dual-Core LX7) |
| **Memory** | 16 MB Flash / 8 MB PSRAM |
| **Display** | 2.2″ TFT LCD (222×480) + Capacitive Touch |
| **Wireless** | Wi-Fi 4 / Bluetooth 5.0 LE / LoRa (SX1262 – 433·868·915·920 MHz options) |
| **Wired Communication** | Ethernet (W5500), RS232, RS485, CAN-FD (2.5 kV isolation) |
| **I/O and Expansion** | One 10 A relay output, Qwiic / STEMMA QT I²C expansion port |
| **Power** | 12–24 V DC input, USB-C 5 V (for programming) |
| **Development Environment** | Arduino IDE / PlatformIO / ESP-IDF compatible |

---

## **Strengths of the Integrated Design**

### **1️⃣ Fully Unified Industrial and IoT Interfaces**

Unlike typical IoT boards limited to Wi-Fi or BLE, the T-Connect Pro comes with **RS232, RS485, CAN, Ethernet, and LoRa** as standard. This allows direct communication with industrial devices and sensors without external modules or complex wiring.

### **2️⃣ Built-In On-Site UI**

Featuring a **2.2″ color touchscreen**, the board can serve as a simple **HMI (Human-Machine Interface)**. Users can display sensor data, monitor relay states, or control equipment directly from the onboard display.

### **3️⃣ Industrial Power and Form-Factor Compatibility**

With a **12–24 V DC input** and **DIN-rail mountable design**, it fits seamlessly into existing industrial setups. Both the CAN and RS485 modules use **2.5 kV isolated transceivers**, ensuring noise resistance and surge protection in harsh environments.

---

## **External Reviews and Media Coverage**

### **🔹 CNX Software (March 5, 2025)**

📄 Original article: [LILYGO T-Connect Pro Industrial IoT Controller Offers Ethernet, WiFi, Bluetooth, LoRa, RS232, RS485 and CAN Bus](https://www.cnx-software.com/2025/03/05/lilygo-t-connect-pro-industrial-iot-controller-offers-ethernet-wifi-bluetooth-lora-rs232-rs485-and-can-bus/)

**CNX Software** describes the T-Connect Pro as an “**ESP32-S3-based industrial IoT controller that unifies all key wired and wireless communication interfaces on one board.**” The article highlights its compact gateway potential with **LoRa, Ethernet, CAN, and RS485** integration, and its suitability for **edge devices and IoT hubs**.

It also notes that the board’s **DIN rail mount, industrial power input, and single 10A relay** make it ideal for field deployment, while **limited analog and digital I/O** remain a drawback. Priced around **$70–$90**, CNX calls it “an accessible and practical platform for industrial IoT developers.”

---

### **🔹 Hackster.io – Author: Gareth Halfacree**

📄 Original article: [LILYGO Goes After the Industrial Automators with the DIN-Mountable T-Connect Pro](https://www.hackster.io/news/lilygo-goes-after-the-industrial-automators-with-the-din-mountable-t-connect-pro-9c4db04fb48e)

In his review, **Gareth Halfacree** of Hackster.io introduces the board as a “**DIN-rail-mountable ESP32-S3 platform targeting industrial automation applications.**” He emphasizes its **three-layer stacked PCB design**, **isolated RS232/RS485/CAN modules**, and **built-in Ethernet and LoRa** capabilities — all of which enable compact, single-board automation and communication solutions.

Halfacree also praises the **integrated touchscreen LCD** as a simple and intuitive HMI option for on-site control. However, he points out that due to **limited digital I/O and the absence of PLC language support**, the board is better suited as a **prototype or test platform for engineers** rather than a full industrial PLC replacement.

---

## **Example Applications**

| **Field** | **Use Case** |
| --- | --- |
| **IoT Gateway** | LoRa sensor network → Ethernet/Wi-Fi MQTT uplink |
| **Industrial Monitoring** | RS485 (Modbus) data acquisition and display on LCD |
| **Protocol Bridge** | CAN↔Ethernet or RS485↔MQTT data conversion |
| **Edge Computing Node** | On-device anomaly detection using ESP32-S3 AI acceleration |
| **Test Controller** | Functional testing or data logging for industrial devices |

---

## **Technical Limitations**

Both CNX Software and Hackster.io highlight the **limited I/O expandability** as the main constraint. The board lacks multiple analog inputs and digital outputs, and provides only a single 10A relay channel. It also doesn’t offer **PLC-level IEC-61131-3 language support** or full **industrial-grade certification** (EMC, temperature, humidity).

Consequently, the **T-Connect Pro** excels in **prototyping, testing, and proof-of-concept (PoC)** use cases, but additional validation would be required before adopting it as a mass-production industrial controller.

---

## **Engineering Evaluation**

| **Category** | **Rating** |
| --- | --- |
| **Communication Interface Diversity** | ★★★★★ |
| **UI Integration** | ★★★★☆ |
| **Power and Installation Convenience** | ★★★★★ |
| **I/O Expandability** | ★★☆☆☆ |
| **Development Accessibility (Arduino / ESP-IDF)** | ★★★★★ |
| **Industrial Reliability** | ★★★☆☆ |

---

## **Conclusion**

The **LILYGO T-Connect Pro** is best described as “**a unified platform capable of handling all major industrial communication protocols on a single board.**” With Wi-Fi, Bluetooth, LoRa, Ethernet, RS-232/485, and CAN built-in, it serves effectively as an **industrial IoT gateway**, **protocol bridge**, or **edge computing controller**.

**CNX Software** calls it “a well-balanced and affordable industrial IoT controller,” while **Gareth Halfacree (Hackster.io)** concludes it’s “**a practical ESP32-S3-based board designed for automation developers and prototyping in real-world industrial contexts.**”

Rather than a full PLC replacement, the T-Connect Pro is best positioned as an **engineer’s integrated prototyping and field-testing platform**, offering high flexibility and connectivity for industrial IoT innovation.

---

Source: https://maker.wiznet.io/scott/resellers/lilygo-t-connect-pro/