T-Panel S3 Lite get it now

Overview

T-Panel S3 Lite is a streamlined variant of the T-Panel S3, powered by a single ESP32-S3 with a 3.95" 480×480 IPS non-touch display. Compared to the full T-Panel S3, it removes the ESP32-H2 coprocessor, the touch controller, and the RS485/CAN field-bus module, resulting in a simpler and more affordable panel suitable for display-centric IoT dashboards and embedded HMI projects.

Quick Start

Hardware Assembly

Arduino

ESP-IDF

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Key Features

• 3.95" 480×480 IPS LCD, SPI init + RGB parallel data bus (ST7701S controller, YDP395BT001 panel)
• ESP32-S3 with 16 MB Flash and 8 MB PSRAM
• Wi-Fi 2.4 GHz + Bluetooth 5 LE
• Non-touch display (no touch controller)
• MicroSD card slot (SPI interface)
• IO expander (XL9535) for SPI control of display init
• 2 user buttons (KEY1, KEY2) + BOOT button
• Compatible with Arduino, PlatformIO, and ESP-IDF

Specifications

Parameter	Value
SOC	ESP32-S3
Flash	16 MB
PSRAM	8 MB
Display	3.95" 480×480 IPS, ST7701S, SPI+RGB
Touch	None
Wireless	Wi-Fi 2.4 GHz, BT 5 LE
IO Expander	XL9535, I2C
Weight
Package size

Pin Diagram

Display (ST7701S)

ST7701S	BL	VSYNC	HSYNC	PCLK	R0	R1	R2	R3	R4	G0	G1	G2	G3	G4	G5	B0	B1	B2	B3	B4
ESP32-S3	GPIO14	GPIO40	GPIO39	GPIO41	GPIO12	GPIO13	GPIO42	GPIO46	GPIO45	GPIO6	GPIO7	GPIO8	GPIO9	GPIO10	GPIO11	GPIO1	GPIO2	GPIO3	GPIO4	GPIO5

Display SPI init (via XL9535):

Function	XL9535 Pin
SPI CS	IO14
SPI SCLK	IO36 (shared with SD)
SPI MOSI	IO35 (shared with SD)

SD Card

SD Card	CS	SCK	MOSI	MISO
ESP32-S3	GPIO34	GPIO36	GPIO35	GPIO37

Buttons

Function	GPIO
KEY1	GPIO48
KEY2	GPIO47
BOOT	GPIO0

Dimensions

Schematic

T-Panel-Lite V1.0 Schematic (PDF)

Datasheet

• ST7701S Display Controller
• YDP395BT001 Display Panel

Software Libraries

• T-Panel-Lite GitHub Repository
• Arduino_GFX (v1.3.7)
• JPEGDEC (v1.2.8)
• MiniTV

FAQ

Changelog

Version	Date	Notes
V1.0		Initial release