Introduction
ESP32-S3-Zero (without pin header) and ESP32-S3-Zero-M (with pin header) are tiny in size with castellated holes, making them easy to integrate into other host boards. ESP32-S3-Zero comes with an onboard Type-C USB connector, which exposes most of the unused pins in a small form factor. It adopts ESP32-FH4R2 as a system chip (SoC) that integrates low-power WiFi and BLE5 with 4MB Flash and 2MB PSRAM.
In addition, there is a hardware encryption accelerator, RNG, HMAC, and Digital Signature modules to meet the safety requirements of IoT and provide peripheral interfaces.
Moreover, its low-power working mode supports most application scenarios such as IoT, mobile devices, wearable electronic devices, and smart homes.

Board specifications
Equipped with Xtensa 32-bit LX7 dual-core processor, up to 240MHz main frequency
Supports 2.4GHz Wi-Fi (802.11 b/g/n) and Bluetooth 5 (LE)
Built in 512KB of SRAM and 384KB ROM, onboard 4MB Flash memory and 2MB PSRAM
Castellated module and onboard ceramic antenna, allows soldering direct to carrier boards
Supports flexible clock, module power supply independent setting, and other controls to realize low power consumption in different scenarios
Integrated with USB serial port full-speed controller, 34 x GPIO pins allows flexibly configuring pin functions
4 x SPI, 2 x I2C, 3 x UART, 2 x I2S, 2 x ADC, etc.

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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.

Package Content
ESP32-S3-Zero with Pre-Soldered Headerx3