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ESP32-C3-DevKitM-1 Available Soon

ESP32-C3-DevKitM-1 is an entry-level development board based on ESP32-C3-MINI-1, a module named like this due to its small size. This board provides a full range of Wi-Fi and Bluetooth LE functions. It is expected to hit the stores in the second half of April 2021.

Most of the I/O pins on the ESP32-C3-MINI-1 module are broken out to the pin headers on both sides of this board for easy interfacing. Developers can either connect peripherals with jumper wires or mount ESP32-C3-DevKitM-1 on a breadboard.

Description of Components

One of the key components is ESP32-C3-MINI-1, which is a general-purpose Wi-Fi-and-Bluetooth-LE combo module that comes with a PCB antenna. At the core of this module is ESP32-C3FN4, a chip that has an embedded flash of 4 MB. Since flash is packaged in the ESP32-C3FN4 chip, rather than integrated into the module, ESP32-C3-MINI-1 has a smaller package size.

There is a power regulator that converts a 5 V supply into a 3.3 V output, turning on when the USB power is connected to the board. All available GPIO pins (apart from the SPI bus for flash) are broken out to the pin headers on the board. (For more details, please see the Header Block.)

The Micro-USB Port can be used as a USB interface, a power supply for the board, or a communication interface between a computer and the ESP32-C3FN4 chip. By pressing the Reset button, the system gets restarted, while the USB-to-UART Bridge provides transfer rates of up to 3 Mbps. Last, but not least, there is an addressable RGB LED (WS2812), driven through GPIO8.

Block Diagram

The block diagram below shows the components of ESP32-C3-DevKitM-1, and their interconnections.

Power Supply Options

There are three mutually exclusive ways to provide power to the board:

  • Micro USB port, default power supply
  • 5V and GND header pins
  • 3V3 and GND header pins

It is recommended that you use the default option, namely, the micro USB port.

Pin Layout



Features of the ESP32­C3­MINI­1


  • ESP32-C3FH4 or ESP32-C3FN4 embedded, 32-bit RISC-V single-core processor, up to 160 MHz
  • 4 MB embedded flash384 KB ROM
  • 400 KB SRAM (16 KB for cache)
  • 8 KB SRAM in RTC


  • IEEE 802.11 b/g/n-compliant
  • Center frequency range of operating channel:2412~2484 MHz
  • Supports 20 MHz, 40 MHz bandwidth in 2.4 GHzband
  • 1T1R mode with data rate up to 150 Mbps
  • Wi-Fi Multimedia (WMM)TX/RX A-MPDU, TX/RX A-MSDU
  • Immediate Block ACK
  • Fragmentation and defragmentation
  • Transmit opportunity (TXOP)
  • Automatic Beacon monitoring (hardware TSF)
  • 4 × virtual Wi-Fi interfaces
  • Simultaneous support for Infrastructure BSS inStation mode, SoftAP mode, Station + SoftAPmode, and promiscuous modeNote that when ESP32-C3 family scans in Stationmode, the SoftAP channel will change along withthe Station channel
  • Antenna diversity
  • 802.11mc FTM


  • Bluetooth LE: Bluetooth 5, Bluetooth mesh
  • Speed: 125 Kbps, 500 Kbps, 1 Mbps, 2 Mbps
  • Advertising extensions
  • Multiple advertisement sets
  • Channel selection algorithm #2


  • Interfaces: GPIO, SPI, UART, I2C, I2S, remotecontrol peripheral, LED PWM controller, generalDMA controller, TWAI®controller (compatible withISO 11898-1), temperature sensor, SAR ADC
  • 40 MHz crystal oscillatorOperating voltage/Power supply: 3.0~3.6 V
  • Operating ambient temperature:85 °C version module: –40~85 °C105 °C version module: –40~105 °C
  • Dimensions: (13.2 × 16.6 × 2.4) mm




The board can currently be programmed with the ESP-IDF framework, and all the necessary instructions for developers to get started can be found here.



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