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ESP32-S3-Zero User Guide


The ESP32-S3-Zero mini development board is based on the ESP32-S3FH4R2 dual-core processor and allows for the breakout of most pins within a small form factor. It utilizes a half-hole process and can be soldered onto custom boards.


  • 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 × GPIO pins allows flexibly configuring pin functions
  • 4 × SPI, 2 × I2C, 3 × UART, 2 × I2S, 2 × ADC, etc.