ESP32-S3-ePaper-1.54G

This product is an e-Paper AIoT development board featuring an ESP32-S3-PICO-1-N8R8 dual-core LX7 processor (240 MHz). It supports 2.4 GHz Wi-Fi and Bluetooth 5 (LE), features 512 KB onboard SRAM, with 8 MB PSRAM and 8 MB Flash stacked on-chip. The board comes with a 1.54inch e-Paper display, which offers ultra-low power consumption and excellent visibility under ambient light, making it ideal for portable devices and long-endurance applications. It integrates an RTC chip, SHTC3 temperature and humidity sensor, TF card slot, low-power audio codec chip circuit, and Lithium battery recharge management circuit. It reserves interfaces including USB, UART, I2C, and GPIO for easy functionality expansion and sensor connectivity, providing a flexible and reliable development platform for IoT terminals, electronic tags, portable displays, and other applications.

SKU	Product
34586	ESP32-S3-ePaper-1.54G
34585	ESP32-S3-ePaper-1.54G-EN

If you are looking for:

• Accelerating development with AI tools: Share this page link with AI tools to help them accurately understand the board hardware and generate usable code.
• Developing with Arduino IDE: See Working with Arduino
• Developing with ESP-IDF: See Working with ESP-IDF
• Downloading schematics, datasheets, and example code: See Related Resources
• Having issues: See Product FAQ or contact Technical Support

Onboard Resources

1. ESP32-S3-PICO-1-N8R8 Wi-Fi and Bluetooth SoC, running at 240MHz, with integrated 8MB Flash and 8MB PSRAM in a stacked package
2. TF Card Slot TF card must be formatted as FAT32 for use
3. ES8311 Audio Codec Chip Supports audio input and output, low-power design, suitable for voice recognition and playback applications
4. BOOT Button Press and hold the BOOT button to power on again to enter download mode
5. PWR Power Button Hold BOOT, re-power on to enter download mode
6. Type-C Interface ESP32-S3 USB interface for program flashing and serial logging
7. Microphone For audio capture
8. SHTC3 Temperature and Humidity Sensor Provides ambient temperature and humidity measurement, enabling environmental monitoring function
9. MX1.25 2PIN Speaker Header Audio signal output, for connecting external speaker
10. MX1.25 2PIN Lithium Battery Header For connecting a lithium battery
11. Onboard Antenna Supports 2.4GHz Wi-Fi (802.11 b/g/n) and Bluetooth 5 (LE)
12. PCF85063 (back side) RTC clock chip, supports time-keeping function
13. 2 × 6PIN 2.54mm Pitch Female Header Can be used for expansion
14. Speaker Plays audio

Peripheral Quick Reference

Module	Device / Function	Interface	Address / Parameters	GPIO / Signals
E-Paper	1.54G	SPI	200 x 200	EPD_PWR=GPIO6, EPD_BUSY=GPIO8, EPD_DC=GPIO10, EPD_CS=GPIO11, EPD_SCLK=GPIO12, EPD_SDI=GPIO13, EPD_RST=GPIO9
RTC	PCF85063ATL	I2C	Common 7-bit address 0x51, 32.768 kHz crystal	SCL=GPIO48, SDA=GPIO47, INT=GPIO5
Battery Sampling	VBAT divided to ADC	ADC	R21 pull-up 200K, R38 pull-down 200K; VBAT=VADC×2	GPIO4 / BAT_ADC
Power Control	BAT_KEY / BAT_Control	GPIO	PWR power function circuit	BAT_KEY=GPIO18, BAT_Control=GPIO17
Audio Capture/Playback	ES8311	I2S	Common 7-bit address: 0x18	I2S_MCLK=GPIO14, I2S_SCLK=GPIO15, I2S_ASDOUT=GPIO16, I2S_LRCK=GPIO38, I2S_DSDIN=GPIO45, PA_EN=GPIO42, PA_CTRL=GPIO46
Temperature & Humidity Sensor	SHTC3	I2C	Common 7-bit address: 0x70	SCL=GPIO48, SDA=GPIO47
TF Card	TF Card Slot	SDIO		SD_CLK=GPIO39, SD_MOSI=GPIO41, SD_MISO=GPIO40
USB Type-C	ESP32-S3 native USB	USB	Download, logging	USB_N=GPIO19, USB_P=GPIO20
UART0	Default serial port	UART	Debug / externally accessible interface	U0TXD=GPIO43, U0RXD=GPIO44
Charging Management	ETA6098	Power	Single-cell Li-Ion battery charging/discharging	GH1.25 battery connector
3.3V DC-DC	MP1605	Power	System 3.3V	VCC3V3

ePaper Display Specifications

Display Panel	E-Paper	Display Size	1.54inch
Display Resolution	200 × 200	Grayscale Levels	2
Communication Interface	SPI	Full Refresh Time	20s
Display Colors	Red, Yellow, Black, White	Fast Refresh Time	15s
Viewing Angle	>170°	Display Mode	Reflective

Pinout Definition

When using the reserved GPIO terminals on the ESP32-S3-ePaper-1.54G board, pay attention to wire colors and corresponding functions to avoid damaging the board due to incorrect wiring habits

Expansion Interface

Type	Signals
Power	5V / 3V3 / GND
I2C	SCL(GPIO48) / SDA(GPIO47)
UART	TX(GPIO43) / RX(GPIO44)
USB	USB_N(GPIO19)/ USB_P(GPIO20)
GPIO	GPIO1 / GPIO2 / GPIO3

Full GPIO Allocation

The table below lists the GPIOs already occupied by onboard circuits and those brought out to expansion headers.

GPIO	Signal Name	Connected To	Remarks
GPIO0	BOOT / Key1	BOOT button	Strapping pin; button to enter download mode
GPIO1	GPIO1	Reserved female header	Expansion header GPIO1
GPIO2	GPIO2	Reserved female header	Expansion header GPIO2
GPIO3	GPIO3	Reserved female header	Expansion header GPIO3
GPIO4	BAT_ADC	Battery voltage divider sampling	R21 pull-up 200K, R38 pull-down 200K; VBAT=VADC×2
GPIO5	RTC_INT	PCF85063 RTC interrupt	-
GPIO6	EPD3V3_EN	E-Paper power switch	E-paper 3.3V supply enable
GPIO7	EPD_TP_RST	Reserved touch for e-Paper	Touch reset pin (reserved)
GPIO8	EPD_BUSY	E-Paper busy status	-
GPIO9	EPD_RST	E-Paper reset	-
GPIO10	EPD_D/C	E-Paper data/command	-
GPIO11	EPD_CS	E-Paper chip select	SPI slave select
GPIO12	EPD_SCLK	E-Paper SPI clock	SPI communication clock
GPIO13	EPD_SDI	E-Paper SPI data	SPI master output data
GPIO14	I2S_MCLK	ES8311 audio master clock	-
GPIO15	I2S_SCLK	ES8311 audio bit clock	-
GPIO16	I2S_ASDOUT	ES8311 audio data output	I2S audio output
GPIO17	BAT_Control	Battery power control	Battery charge/discharge management
GPIO18	BAT_KEY	Battery power enable switch	-
GPIO19	USB_N	USB Type-C D-	ESP32-S3 native USB
GPIO20	USB_P	USB Type-C D+	ESP32-S3 native USB
GPIO21	EPD_TP_INT	E-Paper touch interrupt	Touch interrupt (reserved)
GPIO38	I2S_LRCK	ES8311 audio frame clock	-
GPIO39	SD_CLK	TF card SDIO clock	-
GPIO40	SD_MISO	TF card SDIO data 0	-
GPIO41	SD_MOSI	TF card SDIO command	-
GPIO42	PA_EN	ES8311 power supply enable	-
GPIO43	U0TXD	Reserved UART TX female header	Expansion header TX
GPIO44	U0RXD	Reserved UART RX female header	Expansion header RX
GPIO45	I2S_DSDIN	ES8311 audio data input	I2S audio capture
GPIO46	PA_CTRL	Audio amplifier enable -
GPIO47	SDA	I2C data bus	Shared by RTC/SHTC3/ES8311/EPD_TP
GPIO48	SCL	I2C clock bus	Shared by RTC/SHTC3/ES8311/EPD_TP

Precautions

• When connecting external I2C devices, avoid address conflicts with 0x18, 0x70, 0x51.
• GPIO19/GPIO20 are connected to USB Type-C and are not recommended for use as general-purpose GPIO.
• GPIO0 is the BOOT pin, and EN/CHIP_PU is the reset signal; they are not recommended for general user input.
• GPIO33 to GPIO37 are used for the integrated Octal SPI PSRAM and cannot be used for other functions.

Dimensions

Development Methods

The ESP32-S3-ePaper-1.54G supports two development frameworks: Arduino IDE and ESP-IDF, offering flexibility for developers. You can choose the appropriate development tool based on project requirements and personal preference.

Both development methods have their own advantages. Developers can choose based on their needs and skill levels. Arduino is simple to learn and quick to start, suitable for beginners and non-professionals. ESP-IDF provides more advanced development tools and stronger control capabilities, suitable for developers with professional backgrounds or higher performance requirements, and is more appropriate for complex project development.

• Arduino IDE is a convenient, flexible, and easy-to-use open-source electronics prototyping platform. It requires minimal foundational knowledge, allowing for rapid development after a short learning period. Arduino has a huge global user community, providing a vast amount of open-source code, project examples, and tutorials, as well as a rich library ecosystem that encapsulates complex functions, enabling developers to implement various features rapidly. You can refer to the Working with Arduino to complete the initial setup, and the tutorial also provides related example programs for reference.

• ESP-IDF, short for Espressif IoT Development Framework, is a professional development framework launched by Espressif Systems for its ESP series of chips. It is based on C language development and includes compilers, debuggers, flashing tools, etc. It supports development via command line or integrated development environments (such as Visual Studio Code with the Espressif IDF plugin), which provides features like code navigation, project management, and debugging. We recommend using VS Code for development. For the specific configuration process, please refer to the Working with ESP-IDF. The tutorial also provides relevant example programs for reference.