Bitaxe v2.2: Open Source Bitcoin Mining Hardware & Firmware

Open source Bitcoin miner hardware and firmware using BM1397 ASICs.

Bitaxe v2.2: Open Source Bitcoin Mining Hardware & Firmware
  • The bitaxe v2.2! Hashing just a hair under 400GH/s 12.5W.
  • Standalone: can mine directly to your pool over WiFi. No External computer needed.
  • Embedded: low cost, low maintenance, high availability, high reliability, low power.
  • ASIC: based on the very efficient BM1397 from Bitmain.
  • Versatile: solo/pool mining, autotune power/heat/efficiency.
  • Open Source: All design files are provided.


  • ESP32-S3-WROOM-1 wifi microcontroller on board
  • TI TPS40305 buck regulator steps down the 5V input to power the BM1397
  • Maxim DS4432U+ current DAC digitally adjusts the BM1397 core voltage from 0.04V to 2.4V
  • TI INA260 power meter measures the input voltage and current of the miner
  • Microchip EMC2101 measures the BM1397 internal diode temperature. Also PWM controls the fan and monitors tach output.
  • Two sweet RGB status LEDs

Current Status

  • The hardware has been built and tested.
  • Using cgminer on a separate computer, the bitaxe can mine in excess of 400 GH/s
  • ESP32 miner firmware is still under development.

GitHub Repo