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A mini Wi-Fi & Bluetooth LE board based on ESP32-C3FH4.


  • based ESP32-C3 WIFI & Bluetooth LE RISC-V Single-Core CPU
  • Type-C USB
  • 4MB Flash
  • Clock speed: 160 Mhz
  • 12x Digital IO
  • Size: 34.3 mm x 25.4 mm
  • Weight: 2.6g
  • Compatible with LOLIN D1 mini shields
  • Compatible with MicroPython, Arduino and ESP-IDF
  • Default firmware: MicroPython

About Board Versions

Circuitpython builds after 8.0.0-beta6 target the v2.1 revision of this board. V1.0 had a design flaw in the antenna circuitry which cannot be compensated for in software. V2.1 replaces the PCB trace antenna with a small ceramic antenna and the status LED on GPIO7 is replaced by a WS2812B RGB addressable LED.

Using 8.0.0-beta6 or earlier builds on a v2.1 board or post-8.0.0-beta6 builds on a 1.0 board will not result in proper status LED operation.

V1.0 boards need set WIFI Tx Power to 8.5dBm in order to use WIFI. = 8.5


Learn More


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CircuitPython 8.2.6

This is the latest stable release of CircuitPython that will work with the LOLIN C3 Mini.

Use this release if you are new to CircuitPython.

Release Notes for 8.2.6


Built-in modules available: _asyncio, _bleio, _pixelmap, adafruit_bus_device, adafruit_pixelbuf, aesio, analogbufio, analogio, array, atexit, audiocore, audiomixer, binascii, bitbangio, bitmaptools, board, builtins, builtins.pow3, busio, busio.SPI, busio.UART, canio, collections, digitalio, displayio, dualbank, errno, espidf, espnow, fontio, framebufferio, getpass, hashlib, i2ctarget, io, ipaddress, json, keypad, keypad.KeyMatrix, keypad.Keys, keypad.ShiftRegisterKeys, math, mdns, microcontroller, msgpack, neopixel_write, nvm, onewireio, os, os.getenv, ps2io, pulseio, pwmio, rainbowio, random, re, rgbmatrix, rtc, sdcardio, select, sharpdisplay, socketpool, ssl, storage, struct, supervisor, synthio, sys, terminalio, time, touchio, traceback, ulab, vectorio, watchdog, wifi, zlib

Absolute Newest

Every time we commit new code to CircuitPython we automatically build binaries for each board and language. The binaries are stored on Amazon S3, organized by board, and then by language. These releases are even newer than the development release listed above. Try them if you want the absolute latest and are feeling daring or want to see if a problem has been fixed.

Previous Versions of CircuitPython

All previous releases of CircuitPython are available for download from Amazon S3 through the button below. For very old releases, look in the OLD/ folder for each board. Release notes for each release are available at GitHub button below.

Older releases are useful for testing if you something appears to be broken in a newer release but used to work, or if you have older code that depends on features only available in an older release. Otherwise we recommend using the latest stable release.