T-Mini E-Paper S3 get it now

Overview

T-Mini E-Paper S3 is a compact multifunctional development board based on ESP32-S3FN4R2 (4 MB Flash, 2 MB QSPI PSRAM). Features a 1.02-inch E-Ink display (128 × 80), SX1262 LoRa (868/915/923 MHz), PCF85063ATL RTC, TF card, QWIIC interface, and 18350 3.7 V battery. Suitable for remote IoT monitoring nodes, low-power information display tags, and portable data logging. 102 × 24.5 × 53 mm.

Quick Start

Example Support

Example	PlatformIO/Arduino	ESP-IDF	Description
Extension	✓		LoRa expansion + RTC example
Meun_Lora_Shield	✓		Menu example with Meshtastic mode
Meun	✓		Menu interface example
GxEPD_TF_Card_Example	✓		TF card function example
Hello_World_U8G2_Fonts	✓		U8G2 font library example
GxEPD_Example	✓		E-Ink, SD card, and Wi-Fi test
Partial_UpdateTest	✓		E-Ink partial refresh test

PlatformIO

1. Install Visual Studio Code and Python
2. Search for and install the PlatformIO IDE extension in VS Code
3. Clone the LilyGO-Mini-Epaper-S3 repository
4. Open platformio.ini, under [platformio] uncomment the desired default_envs and src_dir line (keep only one active)
5. Click ✓ to compile, click → to upload

Arduino

1. Install Arduino IDE
2. Add ESP32 boards URL: https://espressif.github.io/arduino-esp32/package_esp32_index.json
3. Copy all directories from the project lib folder to your Arduino libraries folder
4. 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	4MB (32Mb)
Core Debug Level	None
Partition Scheme	Default 4MB with spiffs (1.5MB APP/1.5MB SPIFFS)
PSRAM	QSPI PSRAM
Arduino Runs On	Core 1
Events Run On	Core 1

5. Click Upload

Development Platforms

1. PlatformIO
2. Arduino IDE
3. MicroPython

Video

Key Features

• ESP32-S3FN4R2 @ 240 MHz, 4 MB Flash, 2 MB QSPI PSRAM, Wi-Fi + BT 5.0
• 1.02-inch E-Paper (128 × 80), SX1262 LoRa (868/915/923 MHz)
• PCF85063ATL RTC, TF card, QWIIC, 18350 3.7 V battery, 102 × 24.5 × 53 mm

Product Parameters

Feature	Specification
MCU	ESP32-S3FN4R2 @ Dual-core LX7
Flash	4 MB
PSRAM	2 MB (QSPI)
Wi-Fi	2.4 GHz 802.11 b/g/n
Bluetooth	Bluetooth 5.0 LE
Display	1.02-inch E-Paper, 128 × 80 px
LoRa	SX1262 (868/915/923 MHz)
RTC	PCF85063ATL
Storage	TF card
USB	1 × Type-C
Expansion	1 × LoRa antenna, 1 × QWIIC
Buttons	RESET + BOOT + LEFT + RIGHT
Battery	18350 3.7 V lithium
Mounting Holes	M1 × 4
Dimensions	102 × 24.5 × 53 mm

Pin Diagram

Pin Mapping

GPIO	LoRa	TF	EPD (SPI)	RTC	Button	USB
IO0					Button_BOOT
IO3					Button_RIGHT
IO4					Button_LEFT
IO5	Lora_DIO1
IO6	Lora_MISO
IO8	Lora_SCK
IO9				RTC_SCL
IO10			EPD_BUSY
IO11			EPD_RST
IO13			EPD_CS
IO14			EPD_SCLK
IO15			EPD_MOSI
IO16	Lora_BUSY
IO17	Lora_MOSI
IO18				RTC_SDA
IO19						USB_N
IO20						USB_P
IO21	Lora_RST
IO38		TF_MISO
IO39		TF_MOSI
IO40		TF_CS
IO41		TF_SCK
IO42			EPD_EN

Dimension Diagram

Schematic

• T-Mini-E-paper-S3 V1.2 Schematic
• LoRa Shield Schematic

Datasheet

• ESP32-S3 Datasheet
• SX1262 Datasheet
• PCF85063ATL Datasheet

Software Development

• LilyGO-Mini-Epaper-S3 GitHub Repository

Dependent Libraries

• GxEPD
• RadioLib
• Adafruit_GFX_Library
• PCF8563_library
• AceButton
• Adafruit_NeoPixel
• ArduinoJson
• BMA423
• QMC5883LCompass

FAQ

• Q. Why does my board keep failing to upload programs? A. Hold BOOT and press RST once, release RST while still holding BOOT, then start the upload.

• Q. No serial output from USB? A. Enable USB CDC On Boot in Arduino IDE: Tools → USB CDC On Boot → Enabled.

• Q. How to verify hardware is working? A. Flash the firmware test file to check peripherals.

Version History

Version	Release Date	Update Description
T-Mini-E-paper-S3 V1.0	2023-11-10	Initial hardware version
T-Mini-E-paper-S3 V1.2	2024-01-15	Hardware optimization update