T3-S3 E-Paper get it now

Overview

T3-S3 E-Paper is a low-power IoT development board based on the ESP32-S3FH4R2 microcontroller with 2.4 GHz Wi-Fi and Bluetooth 5.0. It integrates a 2.13-inch E-ink display (DEPG0213BN, 250 × 122) and supports multi-band LoRa modules (SX1280 @ 2.4 GHz, or SX1276/SX1262 @ 868/915 MHz). Equipped with 4 MB Flash, 2 MB PSRAM, TF card expansion, and dual power supply (USB-C or 3.7 V Li-Po battery). Suitable for electronic labels, smart agriculture, industrial sensing, and smart warehousing.

Quick Start

Example Support

Example	PlatformIO/Arduino	ESP-IDF	Description
Lilygo-LoRa-Epaper-series	✓		E-Paper, LoRa, SD Card examples

PlatformIO

1. Install Visual Studio Code and Python
2. Search for and install the PlatformIO IDE extension in VS Code
3. Open the project folder. Open platformio.ini, uncomment your example under [platformio]
4. Click ✓ to compile, connect via USB-C, click → to upload

Arduino

1. Install Arduino IDE
2. In Board Manager, find and install esp32 by Espressif Systems
3. Copy library folders from the project to your Arduino Sketchbook libraries folder
4. Open the example .ino file
5. 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
PSRAM	OPI PSRAM
Arduino Runs On	Core 1
Events Run On	Core 1

6. Select the correct port and click Upload

If upload fails: hold BOOT, press RST, release RST, then click Upload.

Development Platforms

1. MicroPython
2. Arduino IDE
3. PlatformIO

Video

Key Features

• ESP32-S3FH4R2 dual-core LX7 @ 240 MHz, Wi-Fi + Bluetooth 5.0 LE
• 2.13-inch DEPG0213BN E-ink display (250 × 122), SPI
• LoRa: SX1280 (2.4 GHz) or SX1276/SX1262 (868/915 MHz)
• 4 MB Flash + 2 MB OPI PSRAM + TF card slot
• USB-C or 3.7 V Li-Po battery (with battery switch)
• STEMMA QT / QWIIC interface

Product Parameters

Feature	Specification
MCU	ESP32-S3FH4R2 @ Dual-core LX7, 240 MHz
Flash	4 MB
PSRAM	2 MB (OPI PSRAM)
Wi-Fi	2.4 GHz 802.11 b/g/n
Bluetooth	Bluetooth 5.0 LE
LoRa	SX1280 (2.4 GHz) / SX1276 / SX1262 (868/915 MHz)
Display	2.13-inch DEPG0213BN E-Paper, 250 × 122
Storage	TF card slot
USB	1 × Type-C
Battery	3.7 V Li-Po (JST-GH 2 mm)
Expansion	STEMMA QT / QWIIC, 2.54mm 2×13 GPIO
Mounting Holes	4 × M2
Dimensions	67 × 29 × 15 mm

Pin Diagram

Pin Mapping

#define EDP_BUSY_PIN   48
#define EDP_RSET_PIN   47
#define EDP_DC_PIN     16
#define EDP_CS_PIN     15
#define EDP_CLK_PIN    14   // CLK
#define EDP_MOSI_PIN   11   // MOSI
#define EDP_MISO_PIN   -1

#define RADIO_SCLK_PIN 5
#define RADIO_MISO_PIN 3
#define RADIO_MOSI_PIN 6
#define RADIO_CS_PIN   7
#define RADIO_DIO1_PIN 33
#define RADIO_BUSY_PIN 34
#define RADIO_RST_PIN  8
#define RADIO_POW_PIN  35

// SX1276/78 only
#define RADIO_DIO0_PIN 9
#define RADIO_DIO3_PIN 21
#define RADIO_DIO4_PIN 10
#define RADIO_DIO5_PIN 36

#define SDCARD_MOSI    EDP_MOSI_PIN
#define SDCARD_SCLK    EDP_CLK_PIN
#define SDCARD_MISO    2
#define SDCARD_CS      13

#define BOARD_LED      37
#define BAT_ADC_PIN    1
#define BUTTON_PIN     0

Dimension Diagram

Schematic

• T3-S3-E-paper V1.0 Schematic

Datasheet

• DEPG0213BN (E-Paper)
• ESP32-S3 Datasheet
• SX1262 Datasheet
• SX1276 Datasheet
• SX1280 Datasheet

Software Development

• Lilygo-LoRa-Epaper-series GitHub Repository

Dependent Libraries

• GxEPD
• RadioLib
• Adafruit-GFX-Library
• SensorLib

FAQ

• Q. How to adjust the external antenna resistor? A. Refer to the image below for resistor direction adjustment:

• Q. Why is the E-ink refresh slow? A. E-ink full refresh takes 2–3 seconds by design. After refresh, no power is needed to maintain the display — ideal for static content.

• Q. Which LoRa modules are supported? A. SX1280 (2.4 GHz), SX1276 (868/915 MHz), SX1262 (868/915 MHz).

• Q. What is the battery life? A. In deep sleep mode with a suitable Li-Po battery, battery life can reach several weeks to months.

• Q. Upload fails? A. Hold BOOT, press and release RST, then release BOOT, and click Upload.

Version History

Version	Release Date	Update Description
T3-S3-E-paper V1.0	2023-12-16	Initial hardware version
T3-S3-E-paper V1.1	2024-03-10	Software optimization update

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Related Tests

E-Paper Performance

Refresh Mode	Refresh Time	Power
Full Refresh	2–3 s	Higher
Partial Refresh	0.3–0.5 s	Lower
Sleep Mode	—	Very Low