T-Connect Pro

Overview

T-Connect Pro is a 3-layer stackable industrial-grade module based on ESP32-S3-R8 (16 MB Flash, 8 MB PSRAM). Integrates SX1262 LoRa (HPD16A, 433–920 MHz), ST7796 TFT LCD (222 × 480, SPI) with CST226SE capacitive touch, W5500 Ethernet, CAN (TD501MCANFD), RS485 (TD501D485H-A), RS232 (TD501D232H), and 10 A relay. 12–24 V DC wide-range input. Suitable for complex industrial automation and IoT terminals.

Quick Start

Example Support

Example	PlatformIO/Arduino	Description
Original_Test	✓	Factory program
CAN	✓	CAN bus communication
RS485	✓	RS485 communication
RS485_2	✓	RS485 communication (variant)
Ethernet_HTTP	✓	Ethernet HTTP client
Ethernet_Relay	✓	Ethernet relay control
Ethernet_Scan	✓	Ethernet network scan
GFX	✓	Display test
GFX_SX1262	✓	Display + LoRa combined
CST226SE	✓	Touch screen test
Relay	✓	Relay control
SX126x_PingPong	✓	LoRa ping-pong test
raw	✓	LoRa raw transmission
ttn_abp	✓	TTN ABP activation
ttn_otaa	✓	TTN OTAA activation

PlatformIO

Install Visual Studio Code and Python
Search for and install the PlatformIO IDE extension in VS Code
Clone the T-Connect-Pro repository
Open platformio.ini and under [platformio] uncomment the desired environment
Click ✓ to compile, click → to upload

Arduino

Install Arduino IDE
Add ESP32 boards URL: https://raw.githubusercontent.com/espressif/arduino-esp32/gh-pages/package_esp32_index.json
Copy the project libraries folder to your Arduino libraries folder
In Tools → Board, configure:

Arduino IDE Setting	Value
Board	ESP32S3 Dev Module
Upload Speed	921600
USB Mode	Hardware CDC and JTAG
USB CDC On Boot	Enabled
USB Firmware MSC On Boot	Disabled
USB DFU On Boot	Disabled
CPU Frequency	240 MHz (WiFi)
Flash Mode	QIO 80 MHz
Flash Size	16MB (128Mb)
Core Debug Level	None
Partition Scheme	16M Flash (3MB APP/9.9MB FATFS)
PSRAM	OPI PSRAM
Arduino Runs On	Core 1
Events Run On	Core 1

Click Upload

Development Platforms

Video

Key Features

ESP32-S3-R8 dual-core LX7 @ 240 MHz, 16 MB Flash, 8 MB PSRAM, Wi-Fi + BT 5.0
SX1262 LoRa (HPD16A, 433–920 MHz), W5500 Ethernet
ST7796 TFT LCD 222 × 480, CST226SE capacitive touch
CAN (TWAI), RS485, RS232 industrial protocols; 10 A relay
12–24 V DC input, 3-layer stackable design

Product Parameters

Feature	Specification
MCU	ESP32-S3-R8
Flash	16 MB
PSRAM	8 MB (Octal SPI)
Wi-Fi	2.4 GHz 802.11 b/g/n
Bluetooth	Bluetooth 5.0 LE
LoRa	SX1262 (HPD16A), 433–920 MHz
Ethernet	W5500 (SPI)
Display	ST7796 TFT LCD, 222 × 480 (SPI)
Touch	CST226SE (I²C)
CAN	TD501MCANFD (TWAI)
RS485	TD501D485H-A (UART)
RS232	TD501D232H (UART)
Relay	10 A output
IMU	BMA423 (I²C)
USB	1 × Type-C (USB + OTG)
Power Input	12–24 V DC or 5 V/500 mA USB
Expansion	1 × QWIIC
Mounting Holes	4 × M3
Dimensions	88 × 72 × 60 mm (with base)

Pin Diagram

Pin Mapping

Display	IO11 (MOSI), IO13 (MISO), IO41 (DC), IO12 (SCLK), IO21 (CS), IO46 (BL)
Touch (CST226SE)	IO39 (SDA), IO40 (SCL), IO47 (RST), IO3 (INT)
Ethernet (W5500)	IO11 (MOSI), IO13 (MISO), IO48 (RST), IO12 (SCLK), IO10 (CS), IO9 (INT)
LoRa (SX1262)	IO11 (MOSI), IO13 (MISO), IO42 (RST), IO12 (SCLK), IO14 (CS), IO45 (DIO1), IO38 (BUSY)
RS485	IO17 (TX), IO18 (RX)
RS232	IO4 (TX), IO5 (RX)
CAN	IO6 (TWAI_TX), IO7 (TWAI_RX)

Dimension Diagram

Schematic

Datasheet

Software Development

T-Connect-Pro GitHub Repository

Dependent Libraries

FAQ

Q. Why does my board keep failing to upload programs? A. Hold down the BOOT button and try uploading again.
Q. What frequency bands does the LoRa module support? A. The LoRa module supports 433–920 MHz. Select the appropriate band per regional regulations.
Q. Are there any GPIO conflicts when using LoRa with Wi-Fi or Bluetooth? A. No, Wi-Fi and Bluetooth are built-in chip functions with no GPIO conflicts.

Version History

Version	Release Date	Update Description
T-Connect Pro V1.0	—	Initial version

T-Connect Pro ​

Overview ​

Quick Start ​

Example Support ​

PlatformIO ​

Arduino ​

Development Platforms ​

Video ​

Key Features ​

Product Parameters ​

Pin Diagram ​

Pin Mapping ​

Dimension Diagram ​