NanoCell V2.1 is A ESP32-C3 IoT dev board for Home Assistant

NanoCell V2.1 is A ESP32-C3 IoT dev board for Home Assistant


The NanoCell V2.1 is an ESP32-C3 powred dev board designed by Frapais’ lab in Greece. The board comes preloaded with ESPHome and features a battery management IC for battery-based low-power applications.

The board has A buck-boost converter that has been developed to minimize standby current consumption to 66uA, with the exclusion of the current drawn by the ESP32 module. Furthermore, the integrated battery management system (BMS) offers precise capacity measurement and safeguards attached Lithium batteries from potential hazards like overcharging. Additionally, the board features two LEDs functioning as power and charging indicators to communicate the board’s status effectively.

Previously we have written about many ESP32-C3-Based development boards like the SparkFun Pro Micro – ESP32-C3, Olimex ESP32-C3-DevKit-LiPo, and many others feel free to check those out if you are interested in the topic.

NanoCell V2.1 specifications:

  • Microcontroller – ESP32-C3 RISC-V microcontroller @ 160MHz, with Wi-Fi and Bluetooth 5 (LE)
  • Battery Management
    • battery capacity measurement IC
    • Li-ion/Li-po battery charging & protection ICs
    • Accurate battery capacity measurement IC (MAX17048), accessible via I2C on pins 2 and 3.
  • USB – USB Type-C for charging and uploading firmware
  • Buttons – Reset and Boot
  • LEDs – Charging and USB power LED indicators
  • Breadboard-compatible pin headers break out all the pins of ESP32-C3, USB, battery, and VCC voltage.

The NanoCell V2.1 is designed to work seamlessly with Home Assistant and ESPHome automation systems. A setup guide is available in the NanoCell-C3 GitHub repository.

NanoCell V2.1 integrates smoothly with Home Assistant and ESPHome automation systems. You can find a setup guide in the NanoCell-C3 GitHub repository. Priced at $14.49 on Tindie and $14.90 on Elecrow with bulk discounts available, it’s fully open-source, offering hardware schematics and initialization firmware in the GitHub repository.

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About Debashis Das

Tech Content Creator | Hardware Design Engineer | IoT Enthusiast | Digital Storyteller | Video Creator | From crafting digital dialogues at Semicon Media to orchestrating online engagement at, my journey is about making tech talk interesting and accessible. In the quiet corners of the day, I advocate for easier tech education, one tutorial at a time. Let's connect and keep the digital dialogue going!

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