Introduction

BPI-Centi-S3 with ESP32-S3 front

BPI-Centi-S3 with ESP32-S3 back

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BPI-Centi-S3 is a small-sized ESP32-S3 development board with a 1.9-inch LCD onboard, suitable for the development of comprehensive Internet of Things application projects such as color display, interactive control, wireless communication, and sensor data acquisition.

Using the Espressif ESP32-S3 chip, it supports 2.4 GHz Wi-Fi and Bluetooth® Low Energy (Bluetooth® LE) dual-mode wireless communication.

In a compact space, it still provides an incremental rotary encoder, a buzzer, a WS2812 color LED, and all other available pins to meet diverse needs.

Support USB and external 3.7V lithium battery power supply, can realize automatic switching power supply function under dual power supply, and support USB charging mode, equipped with battery voltage detection circuit, convenient for power management.

Key Features

ESP32-S3, Xtensa® 32 bit LX7
2M PSRAM, 8M FLASH
2.4G WIFI, Bluetooth 5, Bluetooth mesh
GPIO, PWM, I2C, SPI, RMT, I2S, UART, USB, JTAG
1 * ST7789 TFT LCD, 1.9-inch, 170*320 resolution, 8bit 8080 parallel port
1 * Rotary Encoder
1 * Buzzer
1 * Neopixel LED
1 * SH 1mm 4-Pin I2C connector
2 * SH 1mm 6-Pin
1 * USB Type-C
1 * MX 1.25mm 2-Pin battery connector, support charging
2 * M3 Screw Holes

hardware

Schematic Diagram of Hardware Interface

BPI-Centi-S3 1.9-inch LCD display:

Hardware Specifications

BPI-Centi-S3 Spec
SoC	ESP32-S3, Xtensa® 32-bit LX7 dual-core processor
Clock Frequency	240MHz MAX
Internal ROM	384 KB
Internal SRAM	320 KB
Onboard FLASH ROM	8MB
On-chip PSRAM	2MB
WIFI	IEEE 802.11 b/g/n, 2.4Ghz frequency band, 150Mbps
bluetooth	Bluetooth 5, Bluetooth mesh
External crystal oscillator	40Mhz
RTC and LowPower Management	Power Management Unit (PMU) + Ultra-Low-Power Coprocessor(ULP)
GPIO	9 available GPIOs have been exported to the JST SH socket
Support Peripherals	I2C, SPI, PWM, UART, RMT, I2S, SD
JST SH 1mm socket	1 * 4Pin, 2 * 6Pin
USB	1 * Full Speed USB 2.0 OTG, Type-C Female
USB Serial/JTAG Controller	1, USB full speed standard, CDC-ACM, JTAG
TFT LCD size	1.9 inches
TFT LCD resolution	170 * 320 RGB
TFT LCD control chip	ST7789V3
TFT LCD interface	8bit 8080 parallel port
Encoder	1 * Incremental Rotary Encoder, support pressing function
Buzzer	1
Color LED	1 * WS2812 2020 LED
Button	RST Button, BOOT Button
Screw Holes	2 * M3 Screw Holes
Machine working temperature	-20℃ ~ +60℃
Working voltage	3.3V
USB input voltage	3.3V~5.5V
Maximum discharge current	[email protected] DC/DC
Battery connector	MX 1.25mm 2-Pin
USB charging	Support
Maximum charging current	500mA

Hardware Dimensions

LCD Wiring Definition

BPI-Centi-S3 LCD Wiring
ESP_LCD_BLK	GPIO2
ESP_LCD_RES	GPIO3
ESP_LCD_CS	GPIO4
ESP_LCD_D/C	GPIO5
ESP_LCD_WR	GPIO6
ESP_LCD_RD	GPIO7
ESP_LCD_D0	GPIO8
ESP_LCD_D1	GPIO9
ESP_LCD_D2	GPIO10
ESP_LCD_D3	GPIO11
ESP_LCD_D4	GPIO12
ESP_LCD_D5	GPIO13
ESP_LCD_D6	GPIO14
ESP_LCD_D7	GPIO15
ESP_TP_RESET	GPIO16
II2C_SCL	GPIO17
II2C_SDA	GPIO18
ESP_TP_INT	GPIO21

Peripheral Wiring Definition

BPI-Centi-S3 peripheral wiring
RST button	RST(CHIP_PU)
BOOT button	GPIO0
BAT_ADC battery voltage detection	GPIO1
Buzzer	GPIO36
EC_KEY Rotary Encoder	GPIO35
EC_A Rotary Encoder	GPIO37
EC_B Rotary Encoder	GPIO47
WS2812B-2020	GPIO48