Product Picture

ES3C28P-TopView
ES3C28P-BottomView

ES3N28P-TopView
ES3N28P--BottomView

Product features

Equipped with ESP32-S3, convenient for development and with sufficient development resources
2.8-inch color screen with a resolution of240x320, supporting up to 262K colors (RGB666), offering a rich display of colors
Rich interfaces for easy to various peripherals (IIC, UART, etc.)
Supports external speakers for audio playback
Equipped with a microphone for receiving audio
Equipped with RGB threecolor indicator lights for a rich display of status
Equipped with a capacitive touch screen for convenient human-machine interaction
Standard TYPE-C interface for convenient program downloading and power
Equipped with a micro TF card slot for easy storage expansion
Supports external lithium batteries for portability
Equipped with a battery charging management circuit to ensure safe battery charging discharging
Provides a rich set of example programs for easy learning
Provides technical support for low-level drivers, and WIKI materials are updated online
The module undergone aging tests and multiple inspections to meet military-grade standards, ensuring stable and long-term operation
Support for “Xiaozhi” AI voice chat;

Product parameters

ESP32 parameters

Item	parameters
Module	ESP32-S3
CPU	Xtensa LX7 32-bit dual-core processor
Clock rate	240MHz（MAX）
Memory	384 KB ROM+512KB SRAM+16 KB RTC SRAM+16MBQSPI Flash
WIFI	2.4GHz band supports 20 MHz and 40MHz channel width
Bluetooth	Bluetooth V4.2 BR/EDR and Bluetooth LE standard
Operation voltage	3.0~3.6(V)
Operation Temperature	–40~85(℃)

Screen parameters

Item	parameters
Screen Size	2.8 inch
Screen Type	IPS TFT
Screen resolution	240xRGBx320(pixels)
Active Area	43.20(W)x57.60(H)(mm)
Number of pixels	MAX：262K(RGB666) TYP：65K(RGB565)
Drive IC	ILI9341V
Screen interface	4-Line SPI
pixels size	0.153(H)x0.153(mm)
View Angle	ALL 0’CLOCK
Luminance(TYP)	280 cd/m²
Backlight Type	White LED*4
Operation Temperature	-30~80(℃)
Storage Temperature	-30~80(℃)

Touch screen parameters

Item	parameters
Effective area size	2.8 inch
Touch screen type	Capacitive touch screen
Valid Area	240x320(pixels)
Drive IC	D-FT6336G
Visual Area	45.20(W)x59.45(H)(mm)
interface	IIC
Operation Temperature	-30~80(℃)
Storage Temperature	-30~80(℃)

Size parameters

Item	parameters
LCD screen size	50.00±0.2(W)x69.20±0.2(H)x2.3±0.1(D) (Not including the registration and back glue)
Touch screen size	50.00±0.2(W)x69.20±0.2(H)x1.20 (D) ±0.1(D) (Not including the registration and back glue)
Product size	Touch screen：50.00(W)x86.00(H)x10.60(D) No Touch screen：50.00(W)x86.00(H)x9.10(D)

Battery charging parameters

Item	parameters
Charging voltage	Range: 4.2~6.5(V) Typical value: 5V
Charging current	Maximum: 500mA Actual value of module: 290mA
Charging saturation voltage	4.24V
Charging temperature	62℃
Charging battery specifications	3.7V polymer lithium battery

Electrical parameters

Item	parameters
Operation Temperature	5.0V
Backlight current	79mA
Backlight brightness(actual value)	touch screen：230cd/m² Touchless screen：270cd/m²
Total current	ESP32-S3 reset: 0 Only display works: 140 Display, speaker, battery charging all work: 560
Power	0.7（Only the display works） 2.8（Display, speaker, battery charging all work）

Other parameters

Item	parameters
SKU	Touch screen：ES3C28P No Touch screen：ES3N28P
Power interface	TYPE-C
Weight	ES3C28P:86 ES3N28P:78

Product interface

Interface Parameters

Item	parameters
ESP32-S3	Main control of the display module, controlling on-board and external peripherals
MicroSD Interface	Insert a Micro SD card to expand the storage space, such as storing font library, pictures, audio files and other large data content.
RGB	LED lights with red, green, and blue colors, controlled by a single IO port.
Uart	1.25mm 4P socket. Can be used for serial port debugging, downloading and communication. An external USB to serial port module is required
Battery interface	1.25mm 2P socket. Used to connect to 3.7V polymer lithium battery, charge the battery through the battery charging management circuit, also used for battery power supply. Note the positive and negative terminals of the interface
BOOT key	For entering the download mode or key test. Press and hold this key to power up, then release to enter the download mode, or after powering up, and hold this key, then press the RESET key, release the RESET key and then release this key, you can also enter the download mode. When it is not necessary enter the download mode, this key can be used as a normal key.
TYPE-C interface	For module power and program downloading. This interface is connected to the one-key download circuit on the module, which can realize automatic entry into the download mode (without the BOOT key).
RESET key	For ESP32S3 main control and LCD reset, press to reset the level.
Expand pin	1.25mm 4P socket. Pins GPIO2/3/14/21 are brought out
Horn interface	1.25mm 2P socket. For connecting to speaker to play audio. For connecting to speaker to play audio (max 1.5W(Ω) or 2W (4Ω) speaker).
IIC interface	1.25mm 4P socket. For external SPI communication device, this SPI interface and MicroSD share. Can be used as ordinary IO1.25mm 4P socket. For external IIC communication device, this IIC interface and capacitive touch screen share. Can be used as ordinary.

ESP32 Pin Parameters

Device	Pin	Pin parameters
LCD	IO10	LCD screen chip select control signal, low level active
	IO46	LCD command/data select control signal; High level: data; low level: command.
	IO12	LCD SPI bus clock signal
	IO11	LCD SPI bus write data signal
	IO13	LCD SPI bus read data signal
	RST	LCD reset control signal, low level reset (share reset pin with ESP32-S3 main control)
	IO45	LCD backlight control signal (high level to turn on backlight, low level to turn off backlight)
Touch Screen	IO16	Capacitive touch screen I2C bus data signal
	IO15	Capacitive touch screen I2C bus clock signal
	IO18	Capacitive touch screen reset control signal, low level reset
	IO17	Capacitive touch screen interrupt input signal, low level input when a touch event occurs.
RGB	IO42	Single-line RGB three-color LED light, which can control the internal red, green, and blue three kinds of light beads separately according to different signals
MicroSD	IO38	SD card SDIO bus clock signal
	IO40	SD card SDIO bus command signal
	IO39/41/48/47	SD card SDIO bus data signals (DATA0~DATA3 four data lines)
Audio	IO1	Audio output enable signal, low level enable, high level disable
	IO4	Audio I2S bus master clock signal
	IO5	Audio I2S bus bit clock signal
	IO6	Audio I2S bus bit output data signal
	IO7	Audio I2S bus left and right channel selection signal. High level: right channel; low level: left channel.
	IO8	Audio I2S bus bit input data signal
Key	IO0	Download mode selection key (hold this key to power on, then release to enter download mode)
Key	EN	ESP32-s3 reset button, low level reset (share with LCD reset)
Uart	RXD0(IO43)	ESP32-S3 UART0 RX signal
Uart	TXD0(IO44)	ESP32-S3 UART0 TX signal
BATTERY	IO9	Battery voltage ADC value acquisition input signal
Expand pin	IO2	Can be used as a normal IO
	IO3	Can be used as a normal IO
	IO14	Can be used as a normal IO
	IO21	Can be used as a normal IO
IIC interface	IO16	I2C bus data signal
IIC interface	IO15	I2C bus clock signal