ESP32-C3-Zero (without pin header) and ESP32-C3-Zero-M (with pin header) are tiny in size with castellated holes, making them easy to integrate into other host boards. ESP32-C3-Zero comes with an onboard Type-C USB connector, which exposes most of the unused pins in a small form factor. It adopts ESP32-C3FH4 as a System-on-Chip (SoC) that integrates low-power WiFi and BLE5 with 4MB Flash. 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.

Features

• Low-power SoC equipped with RISC-V 32-bit single-core processor, up to 160MHz main frequency.
• Supports 2.4GHz Wi-Fi (802.11 b/g/n) and Bluetooth® 5 (LE).
• 400KB of SRAM and 384KB ROM, and 4MB of onboard Flash memory.
• Castellated module and onboard ceramic antenna, allow 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, 15 × GPIO pins allow flexible configuring pin functions.
• 3 × SPI, 1 × I2C, 2 × UART, 1 × I2S, 2 × ADC, etc.

Hardware Description

• When using ESP32-C3-Zero with daughterboards, please avoid covering the ceramic antenna with PCB boards, metal, or plastic components.
• In ESP32-C3-Zero, GPIO12 to GPIO17 pins are not exposed; these pins are used for stacking the 4MB Flash.
• ESP32-C3-Zero uses GPIO10 to connect with WS2812 RGB LED. Please refer to the documentation link for WS2812 specifications.
• ESP32-C3-Zero does not employ a USB to UART chip. When flashing firmware, press and hold the BOOT button (GPIO9) and then connect the Type-C cable.
• The "TX" and "RX" markings on the board indicate the default UART0 pins for ESP32-C3-Zero. Specifically, TX is GPIO21, and RX is GPIO20.

Hardware Connection

• Press the BOOT (GPIO9) 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.

Dimensions

ESP32-C3 Mini Development Board, Based on ESP32-C3FH4 Single-core Processor, 160MHz Running Frequency, 2.4GHz Wi-Fi & Bluetooth 5