ESP32-C3 Super Mini

The ESP32-C3 Super Mini is a thumb-size board with integrated antenna .

The ESP32-C3 processor is a single-core SoC based on the open-source 32-bit RISC-V architecture.

ESP32-C3 Super Mini

Features

It has almost the same size as the XIAO ESP32 C3 but comes with an onboard antenna. Caused by this very small antenna the weak WiFi and BLE RF signal strength may limit the usability.

Arduino Board Configuration

The Arduino Board Manager supports this board by installing the esp32 by espressif package. It can be used with the following settings:

Antenna

The SMD antenna on the board is very small and therefore limiting the signal. This can be improved by some modifications using a simple 31mm wire. See esp32-c3 supermini antenna modification

System configuration

This env.json file can be used as a starting point for configuring this board type.

{
  "device": {
    "0": {
      "name": "superminic3",
      "description": "super mini c3 board.",
      "loglevel": "2",
      "button": "9",
      "logfile": 2,
      "safemode": "false",
      "homepage": "/board.htm",
      "cache": "max-age=600",
      "i2c-SDA": "5",
      "i2c-SCL": "6"
    }
  },
  "ota": {
    "0": { }
  },
  "ntptime": {
    "0": {
      "zone": "CET-1CEST,M3.5.0,M10.5.0/3"
    }
  },
  "digitalin": {
    "boot": {
      "title": "Boot button signal",
      "pin": "9",
      "invert": "true",
      "pullup": "1"
    }
  },
  "digitalout": {
    "led": {
      "description": "Builtin blue LED GPIO8",
      "pin": "8",
      "invert": "1",
      "value": "0"
    }
  }
}

See Also

Tags

BoardWip