ESP32-S3-Zero Mini Development Board WiFi Bluetooth Ultra-small Size ESP32 C3 S3 ESP 32

Hardware Description

When using ESP32-S3-Zero with daughterboards, please avoid covering the ceramic antenna with PCB boards, metal, or plastic components.

In ESP32-S3-Zero, GPIO33 to GPIO37 pins are not exposed; these pins are used for Octal PSRAM.

ESP32-S3-Zero uses GPIO21 to connect with WS2812 RGB LED. .

ESP32-S3-Zero does not employ a USB to UART chip. When flashing firmware, press and hold the BOOT button (GPIO0) and then connect the Type-C cable.

The “TX” and “RX” markings on the board indicate the default UART0 pins for ESP32-S3-Zero. Specifically, TX is GPIO43, and RX is GPIO44.

Hardware Connection

Press the BOOT (GPIO0) key before connecting the Type-C cable each time download the firmware.

Input 3.7V~6V for the castellated hole with 5V silkscreen when connecting the external power.