# ESP32-C3 DevKitM-01

> Espressif official RISC-V ESP32-C3 dev board with ESP32-C3-MINI-1 module, 4 MB embedded SPI Flash, WiFi 4, BLE 5, Micro-USB, RGB LED, and a compact footprint for IoT prototyping.

## Quick Facts

- **Brand:** Espressif
- **Board Type:** dev-board
- **Price:** ~$9.95
- **Product Readiness:** developer
- **CPU:** RISC-V single-core @ 160 MHz (ESP32-C3)
- **CPU Architecture:** RISC-V 32-bit
- **CPU Cores:** 1
- **RAM:** 400 KB SRAM
- **Flash:** 4MB
- **Power:** 5V via Micro USB
- **Operating Voltage:** 3.3V
- **Antenna:** Built-in PCB antenna

## Connectivity

- **Wifi:** 2.4GHz 802.11 b/g/n
- **Bluetooth:** BLE 5.0

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** Yes

## Compatible Firmware

esp-idf, arduino, micropython

## Use Cases

- iot
- smart-home
- environmental-monitoring

## Components

- **ESP32-C3-MINI-1 (C3FN4)** (mcu): Espressif ESP32-C3-MINI-1 module with single-core 160 MHz RISC-V ESP32-C3, 4 MB embedded Flash, WiFi, and BLE 5. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-c3-mini-1_datasheet_en.pdf&ref=openhardware.directory&product=esp32-c3-devkitm-01&source=md-export)

## Protocols

- **I2C**: SDA: GPIO1, SCL: GPIO2
- **SPI**: SCK: GPIO6, MOSI: GPIO7, MISO: GPIO8
- **UART**: TX: GPIO18, RX: GPIO19
- **USB**: 

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| GPIO0 | ADC1_CH0 | ADC | ADC, GPIO, touch |
| GPIO1 | SDA | I2C | I2C, ADC, GPIO, touch |
| GPIO2 | SCL | I2C | I2C, ADC, GPIO, touch |
| GPIO3 | ADC1_CH3 | ADC | ADC, GPIO, touch |
| GPIO4 | ADC1_CH4 | ADC | ADC, GPIO, touch |
| GPIO5 | ADC2_CH0 | ADC | ADC, GPIO, touch |
| GPIO6 | SCK | SPI | SPI, GPIO |
| GPIO7 | MOSI | SPI | SPI, GPIO |
| GPIO8 | MISO | SPI | SPI, GPIO |
| GPIO9 | BOOT | GPIO | GPIO |
| GPIO10 | GPIO | GPIO | GPIO |
| GPIO18 | TX | UART | UART, GPIO |
| GPIO19 | RX | UART | UART, GPIO |

## Available Software

- **[ESP-IDF](https://openhardware.directory/r?to=https%3A%2F%2Fdocs.espressif.com%2Fprojects%2Fesp-idf%2F&ref=openhardware.directory&product=esp32-c3-devkitm-01&source=md-export)**
- **[Arduino ESP32](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fespressif%2Farduino-esp32&ref=openhardware.directory&product=esp32-c3-devkitm-01&source=md-export)**

## Description

## Overview

The ESP32-C3 DevKitM-01 is Espressif's official development board for the ESP32-C3-MINI-1 module, featuring a single-core RISC-V processor at 160 MHz. The switch from Xtensa to RISC-V architecture means the ESP32-C3 is more power-efficient and benefits from the growing open-source RISC-V toolchain ecosystem, while the integration of 4 MB of Flash directly into the C3FN4 chip reduces BOM cost and PCB space for production designs.

WiFi 2.4 GHz (802.11 b/g/n) and Bluetooth Low Energy 5.0 with Mesh support are provided by the onboard radio. The PCB antenna is embedded within the MINI-1 module itself, requiring no external antenna in standard deployments. A USB-to-UART bridge provides Micro-USB programming access compatible with both Arduino IDE and ESP-IDF.

The board exposes all available GPIO pins (except the SPI Flash bus) on standard 2.54 mm headers, along with a 5 V LDO regulator, power-on LED, and an addressable RGB LED on GPIO8 for user feedback. Boot and Reset buttons follow the standard Espressif DevKit layout.

Note that CircuitPython support for the ESP32-C3 was not available at the time of initial release; Arduino (with Espressif's ESP32 Arduino core) and ESP-IDF are the primary supported toolchains.

## Where to Buy

- [Adafruit](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F5337&ref=openhardware.directory&product=esp32-c3-devkitm-01&source=md-export) — 9.95

## Resources

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F5337&ref=openhardware.directory&product=esp32-c3-devkitm-01&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fespressif%2Fesp32-c3&ref=openhardware.directory&product=esp32-c3-devkitm-01&source=md-export)
- [datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-c3_datasheet_en.pdf&ref=openhardware.directory&product=esp32-c3-devkitm-01&source=md-export)

## Tags

`esp32-c3`, `risc-v`, `devkitm`, `espressif`, `esp-idf`, `wifi`, `ble`, `mini-module`

## Images

![ESP32-C3 DevKitM-01](https://nbg1.your-objectstorage.com/openhardware-directory/entities/esp32-c3-devkitm-01/f3dd41a46ef4.jpg)
![ESP32-C3 DevKitM-01](https://nbg1.your-objectstorage.com/openhardware-directory/entities/esp32-c3-devkitm-01/b71aecc9d72d.jpg)

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