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ESP32-C3-Zero

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ESP32-C3-Zero-M.

The ESP32-C3-Zero (Without header) and ESP32-C3-Zero-M (With pre-soldered header) are compact modules featuring castellated holes, making them easy to integrate into other carrier boards. The ESP32-C3-Zero features an on-board Type-C USB connector and breaks out most available pins in a small form factor. It utilizes the ESP32-C3FH4, a System-on-Chip (SoC) that integrates low-power Wi-Fi and BLE 5, along with 4MB of Flash. Additionally, it includes hardware cryptographic accelerators, RNG, HMAC, and a Digital Signature module, meeting IoT security requirements and offering rich peripheral interfaces. Its various low-power operating states satisfy the power consumption needs of application scenarios such as the Internet of Things (IoT), mobile devices, wearable electronics, and smart homes.

Features​

  • Equipped with the ESP32-C3FH4 chip, featuring a RISC-V 32-bit single-core processor running at up to 160 MHz.
  • Supports 2.4GHz Wi-Fi (802.11 b/g/n) and Bluetooth® 5 (LE).
  • Built-in 400KB SRAM and 384KB ROM, with 4MB stacked Flash.
  • Uses a castellated module design with an on-board ceramic antenna, facilitating integration into user-designed baseboards.
  • Supports flexible clock settings and independent module power control to realize multi-scenario low-power modes.
  • Integrated USB Serial full-speed controller, breaking out 15 GPIOs for flexible peripheral configuration.
  • Features peripherals including 3 × SPI, 1 × I2C, 2 × UART, 1 × I2S, 2 × ADC, etc.

Onboard Resources​

ESP32-C3-Zero-Overview.webp

  1. USB Type-C Port
  2. BOOT Button: Hold this button and then press the RESET button to enter download mode.
  3. RESET Button
  4. WS2812 RGB LED
  5. ME6217C33M5G: Low Dropout Regulator (LDO), max output current 800mA.
  6. ESP32-C3FH4: Main frequency up to 160MHz.
  7. 2.4G Ceramic Antenna

Hardware Description​

  • When using the ESP32-C3-Zero as a daughter board, ensure the ceramic antenna area is kept clear. Avoid covering the ceramic antenna with the PCB, metal, or plastic components.
  • On the ESP32-C3-Zero, GPIO12~GPIO17 are not broken out as these pins are used for the stacked 4MB Flash.
  • The ESP32-C3-Zero uses GPIO10 to connect the WS2812 RGB LED. For the WS2812 datasheet, please refer to this link.
  • The ESP32-C3-Zero does not use a USB-to-UART bridge chip. To download firmware, you must hold the BOOT (GPIO9) button before connecting the Type-C cable.
  • The TX and RX silkscreen markings on the board represent the ESP32-C3-Zero's default UART0 pins, where TX is GPIO21 and RX is GPIO20.
  • The board's IO pins support a voltage of 3.3V.

Hardware Connection​

  • Every time you download firmware, hold the BOOT (GPIO9) button before connecting the Type-C cable.
  • When powered by an external source, input a 3.7V~6V power supply at the pad marked "5V".

Pinout​

ESP32-C3-Zero-Pinout.webp

Dimensions​

ESP32-C3-Zero-Dimensions.webp