LilyGo T-Display-S3 AMOLED

Development Board

Code name: LILYGO_T_DISPLAY_S3

LilyGo T-Display-S3 AMOLED is a development board based on the ESP32S3 microcontroller using XTENSA architecture.

This board features a maximum CPU frequency of 240 MHz and 16MB flash memory.

About LilyGo T-Display-S3 AMOLED

🚀 The LilyGo T-Display-S3 AMOLED is a cutting-edge development board featuring an ESP32-S3 chip with integrated WiFi and Bluetooth 5 capabilities. It boasts a 1.91-inch AMOLED display with a resolution of 536x240 pixels, driven by an RM67162 controller, offering vibrant visuals for embedded applications. ⚡

📡 With support for WiFi 802.11 b/g/n and Bluetooth 5 (LE), it ensures seamless wireless connectivity for IoT projects. The board is equipped with 8MB PSRAM and 16MB Flash memory, providing ample storage and performance.

💾 Designed with multiple GPIOs, PWM, ADC, I2C, and SPI support, it is suitable for various applications, including sensor interfacing, graphical user interfaces, and wireless communication.

Where to Buy LilyGo T-Display-S3 AMOLED

Starting from

$32.50 per unit

Amazon.de Ships to EU

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Technical Specifications

Complete technical specification details for LilyGo T-Display-S3 AMOLED

Display

Type AMOLED

Size 1.91"

Resolution 536x240

Driver RM67162

Connectivity

WiFi 802.11 b/g/n (2.4 GHz)

Bluetooth 5.0

BLE 5.0

Microcontroller

Model esp32s3

Clock Speed 240 MHz

Flash Size 16MB

PSRAM 8MB

Architecture xtensa

✨ Features & Pins

Digital IO 48

Analog Input 20

PWM 27

Interrupts 46

Download Full Datasheet

Quick Setup

Copy-paste configs for LilyGo T-Display-S3 AMOLED - auto‑generated from this board's exact hardware specs.

ESP32S3 240 MHz 16MB DIO Xtensa

In Arduino IDE 2 select Lilygo T Display S3 from the esp32 by Espressif package. In PlatformIO use board = esp32-s3-devkitm-1. ESP32S3 · 240 MHz · 16MB · DIO.

Tools menu settings

Board (select in Arduino IDE) Lilygo T Display S3

CPU Frequency 240 MHz

Flash Size 16MB

Flash Mode DIO

Upload Speed 921600

Architecture Xtensa

In Arduino IDE 2, open Boards Manager, search "esp32" by Espressif and install it. Then go to Tools → Board and select "Lilygo T Display S3" for the LilyGo T-Display-S3 AMOLED.

platformio.ini


[env:lilygo_t_display_s3_amoled]
platform  = espressif32
board     = esp32-s3-devkitm-1
framework = arduino

; Exact hardware config for LilyGo T-Display-S3 AMOLED
board_build.mcu        = esp32s3
board_build.f_cpu      = 240000000L
board_build.flash_size = 16MB
board_build.flash_mode = dio
board_upload.flash_size = 16MB

The board value is a close generic match - check PlatformIO board registry for an exact fit.

esp32: block (YAML)


esp32:
  board: esp32-s3-devkitc-1
  framework:
    type: arduino   # or "esp-idf"

# LilyGo T-Display-S3 AMOLED - 240 MHz ESP32S3
# Flash: 16MB | USB: N/A

Paste into your device's .yaml. See ESPHome ESP32 docs for full options.

esptool.py - flash command


esptool.py \
  --chip esp32s3 \
  --baud 921600 \
  write_flash \
    --flash_mode dio \
    --flash_size 16MB \
    0x0 bootloader.bin \
    0x8000    partitions.bin \
    0xe000    boot_app0.bin \
    0x10000   firmware.bin

Install: pip install esptool - replace firmware.bin with your binary - bootloader at 0x0

LilyGo T-Display-S3 AMOLED Pinout Diagram

Complete pin reference for LilyGo T-Display-S3 AMOLED

The LilyGo T-Display-S3 AMOLED pinout offers a variety of digital and analog pins, along with a dedicated display interface. Key pins include:

5V and 3.3V power rails for stable operation.

SDA and SCL for I2C, MISO, MOSI, SCK, and SS for SPI communication.

Additionally, dedicated LCD pins ensure efficient display control.

Safe Pins to Use

These pins are safe for general GPIO usage without boot or system conflicts

IO1

IO2

IO4

IO5

IO6

IO7

IO8

IO15

IO16

IO17

IO18

IO21

Why Are These Pins Safe?

✓ No boot sequence involvement

✓ No flash/PSRAM connections

✓ No USB or JTAG conflicts

✓ Freely assignable without issues

Pins to Avoid or Use with Caution

Reserved for critical functions. Misuse may cause boot failures, programming issues, or system conflicts.

Strapping Pins

Boot behavior & flash voltage

JTAG Debugging

Low-level debugging interface

USB Pins

USB Serial/JTAG communication

Flash/SPI Pins

Memory & PSRAM connections

UART Serial

Debugging & firmware uploads

PIN	Label	Why Avoid	Type
IO0	GPIO0	Must be pulled high (default) or low (to enter UART download mode) at reset. Using it for other functions can interfere with boot mode configuration.	🛠️ Strapping
IO3	GPIO3	Sampled at reset to select JTAG interface (USB Serial/JTAG controller vs. external pins). Improper use can disable external JTAG or alter debug interface.	🛠️ Strapping
IO9	FSPIHD	Connected to external flash (data/hold signal) on most modules. Not recommended for use as GPIO, since it must remain dedicated to flash communication.	⚡ Flash
IO10	FSPICS0	Used to select the external flash chip. It is required for flash access and cannot be repurposed without losing flash connectivity	⚡ Flash
IO11	FSPID	Used as a data line for flash (and in-package PSRAM). It should not be used as GPIO when the flash/PSRAM is in use.	⚡ Flash
IO12	FSPICLK	Drives the flash (and PSRAM) clock. This critical signal must be reserved for memory and not used as general GPIO.	⚡ Flash
IO13	FSPIQ	Used as a data line for flash/PSRAM transfers. Not available for other uses when flash/PSRAM is connected.	⚡ Flash
IO14	FSPIWP	Connected to external flash (data/write-protect signal). Not recommended as GPIO because it’s reserved for flash operations.	⚡ Flash
IO38	FSPIWP	On flash-equipped chips, this pin is tied to the flash’s WP# (or D3) line. It should be avoided for other use, as it’s needed for flash operations.	⚡ Flash
IO39	MTCK (GPIO39)	Default JTAG debugging TCK pin. If JTAG is needed, this pin must be free; it may also be used internally for PSRAM chip select on certain modules, so avoid repurposing it.	🪛 Other
IO40	MTDO (GPIO40)	Default JTAG TDO output for debugging. Using it as GPIO will interfere with JTAG debugging functionality.	🪛 Other
IO41	MTDI (GPIO41)	Default JTAG TDI input for debugging. Should be reserved for JTAG or left unused if JTAG is to remain available.	🪛 Other
IO42	MTMS (GPIO42)	Default JTAG TMS signal for debugging. Using this pin for other purposes will disable the JTAG interface (unless JTAG is rerouted to USB).	🪛 Other
IO43	U0TXD (GPIO43)	Used for bootloader output and UART console logs. If repurposed, you will lose the default serial output (and programming via UART0).	🪛 Other
IO44	U0RXD (GPIO44)	Used for bootloader input (download mode via serial). If repurposed, you cannot use the default UART0 download mode for programming the chip.	🪛 Other
IO45	GPIO45	Determines flash/PSRAM power voltage (3.3 V vs 1.8 V) at boot. Must match hardware configuration; using as GPIO can upset flash supply setting.	🛠️ Strapping
IO46	GPIO46	Must be at a defined level during reset (with GPIO0) to select normal or download boot and UART/USB print mode. This pin is input-only (no output drive), so it should be left for its intended strapping function.	🛠️ Strapping
IO47	SPICLK_P	Used only on variants with Octal SPI interface (e.g. ESP32-S3R16V) as part of the differential clock pair. On such chips it operates at 1.8 V and is reserved for the high-speed octal SPI clock, not for general GPIO use.	⚡ Flash
IO48	SPICLK_N	Used only on variants with Octal SPI interface, as the negative leg of the differential clock&. On such chips it operates at 1.8 V; it should be avoided for GPIO to prevent conflicts with the octal flash/PSRAM clock.	⚡ Flash

Useful Links

Datasheets and resources for LilyGo T-Display-S3 AMOLED

Board Datasheet

Technical specifications

ESP32S3 Datasheet

Microcontroller reference

LilyGo T-Display-S3 AMOLED Custom Pin Mapping

Pin configuration and GPIO mapping for LilyGo T-Display-S3 AMOLED

Digital I/O Pins

Interrupt Pins

Analog Inputs

PWM Pins

Pin	Function	ESP Pin	I/O Type	Description
1	3V3	3.3V	POWER OUTPUT	3.3V power output
2	GND	GND	POWER GROUND	Ground connection
3	5V	5V	POWER INPUT	5V power input for the board
4	IO0	A0	BIDIRECTIONAL	GPIO, ADC pin, Touch, PWM
5	IO1	A1	BIDIRECTIONAL	GPIO, ADC pin, Touch, PWM
6	IO2	A2	BIDIRECTIONAL	GPIO, ADC pin, Touch, PWM
7	IO3	A3	BIDIRECTIONAL	GPIO, ADC pin, Touch, PWM
8	IO4	BAT_VOLT	INPUT	GPIO, Battery Voltage Sense, PWM
9	IO5	LCD_RES	OUTPUT	GPIO, LCD Reset, PWM
10	IO6	LCD_CS	OUTPUT	GPIO, LCD Chip Select, PWM
11	IO7	LCD_DC	OUTPUT	GPIO, LCD Data/Command, PWM
12	IO8	LCD_WR	OUTPUT	GPIO, LCD Write, PWM
13	IO9	LCD_RD	OUTPUT	GPIO, LCD Read, PWM
14	IO10	SS	BIDIRECTIONAL	GPIO, SPI Slave Select, ADC pin, Touch, PWM
15	IO11	MOSI	BIDIRECTIONAL	GPIO, SPI Master Out Slave In, ADC pin, Touch, PWM
16	IO12	SCK	BIDIRECTIONAL	GPIO, SPI Clock, ADC pin, Touch, PWM
17	IO13	MISO	BIDIRECTIONAL	GPIO, SPI Master In Slave Out, ADC pin, Touch, PWM
18	IO14	BUTTON_2	INPUT	GPIO, User Button, PWM
19	IO15	LCD_POWER_ON	OUTPUT	GPIO, LCD Power Enable, PWM
20	IO16	TP_INIT	BIDIRECTIONAL	GPIO, ADC pin, PWM
21	IO17	SCL	BIDIRECTIONAL	GPIO, I2C Clock, ADC pin, PWM
22	IO18	SDA	BIDIRECTIONAL	GPIO, I2C Data, ADC pin, PWM
23	IO21	TP_RESET	BIDIRECTIONAL	GPIO, PWM
24	IO38	LCD_BL	OUTPUT	GPIO, LCD Backlight, PWM
25	IO39	LCD_D0	OUTPUT	GPIO, LCD Data 0, PWM
26	IO40	LCD_D1	OUTPUT	GPIO, LCD Data 1, PWM
27	IO41	LCD_D2	OUTPUT	GPIO, LCD Data 2, PWM
28	IO42	LCD_D3	OUTPUT	GPIO, LCD Data 3, PWM
29	IO43	TX	BIDIRECTIONAL	GPIO, UART Transmit, PWM
30	IO44	RX	BIDIRECTIONAL	GPIO, UART Receive, PWM
31	IO45	LCD_D4	OUTPUT	GPIO, LCD Data 4, PWM
32	IO46	LCD_D5	OUTPUT	GPIO, LCD Data 5, PWM
33	IO47	LCD_D6	OUTPUT	GPIO, LCD Data 6, PWM
34	IO48	LCD_D7	OUTPUT	GPIO, LCD Data 7, PWM

Legend

Function Pin role

GPIO ESP32 pin

I/O Direction

# Pin number

Pin Mappings

Complete pinout and GPIO mapping for LilyGo T-Display-S3 AMOLED

Digital I/O Pins

Interrupt Pins

Analog Inputs

PWM Pins

Pin	Analog	Touch	PWM	Other
0				BUTTON_1
1	A0	T1	PWM
2	A1	T2	PWM
3	A2	T3	PWM
4			PWM	BAT_VOLT
10	A9	T10	PWM	SS
11	A10	T11	PWM	MOSI
12	A11	T12	PWM	SCK
13	A12	T13	PWM	MISO
17	A16		PWM	SCL
18	A17		PWM	SDA
43			PWM	TX
44			PWM	RX

Legend

A0 Analog input

T0 Touch sensor

PWM PWM capable

RX/TX Serial pins

LED Built-in LED

# Pin number

Default Tools & Configuration

Build and upload settings for LilyGo T-Display-S3 AMOLED

Setting	Value
Bootloader tool	esptool_py
Uploader tool	esptool_py
Network uploader tool	esp_ota
Bootloader address	`0x0`
Flash mode	dio
Boot mode	qio
PSRAM type	opi
Maximum upload size	3072 KB (3145728 bytes)
Maximum data size	320 KB (327680 bytes)