Bitaxe

The Bitaxe is a family of open-source, single-chip Bitcoin mining devices that pair one Bitmain ASIC (BM1366, BM1368, or BM1370) with an ESP32 microcontroller running AxeOS, drawing just 5-15W and aimed at solo lottery mining. It is the most widely deployed open-source mining hardware in the world, with well over 100,000 units in the field, and its fully open design is what makes it the entry point to hackable, sovereign home mining.

Also known as: Bitaxe Supra, Bitaxe Ultra, Bitaxe Gamma, Bitaxe Hex, Bitaxe GT.

How the hardware works

The design is deliberately minimal: one hashing ASIC harvested from the same chip families Bitmain uses in its flagship miners (the BM1366 from the S19 XP generation, the BM1368 from the S21, the BM1370 from the S21 Pro generation), one buck converter to feed its core voltage, a heatsink and fan, and an ESP32 that does everything an industrial control board does — talks Stratum to the pool, streams work to the chip over serial, and serves the web dashboard over Wi-Fi. Because the modern chips it borrows are extraordinarily efficient (the S21-generation parts run in the 15-17.5 J/TH class at stock), a single chip delivers on the order of a terahash-scale contribution for roughly the power draw of an LED bulb. Variants scale the same recipe: the Supra and Gamma are single-chip boards, while designs like the Hex put six chips on one PCB.

The firmware side: AxeOS and open alternatives

AxeOS, the stock firmware built on the open-source ESP-Miner codebase, exposes pool settings, frequency and core-voltage tuning, and live hashrate and temperature from a browser — the whole stack is inspectable and reflashable, the opposite of a locked vendor image. Since ESP-Miner/AxeOS v2.14.0 (June 2026), the Bitaxe platform also has native Stratum V2 support, making it one of the few hardware families with SV2 out of the box. Because everything is open, alternative firmware thrives; D-Central maintains DCENT_OS in that same spirit — standing on the shoulders of the Bitaxe and ESP-Miner projects that proved open mining firmware could work.

Lottery odds, honestly stated

A Bitaxe solo-mining is buying lottery tickets with electricity: each hash is an independent chance at a full block reward, and at roughly 1 TH/s against a network measured in hundreds of exahashes, the odds on any given day are vanishingly small. Solo pools like public-pool.io coordinate the ticket-buying without taking custody. The honest pitch is not expected value — it is that a Bitaxe teaches real mining (Stratum, difficulty, tuning, thermals) for a few watts, decentralizes hashrate one desk at a time, and holds a nonzero chance at a life-changing block. People have hit; most never will. Know which game you are playing. Tuning is part of the fun: AxeOS exposes the chip's frequency and core voltage directly, so owners routinely trade a little efficiency for more hashrate or the reverse, constrained mainly by how much heat the small heatsink and fan can move — the same overclocking discipline as a full-size ASIC, at desk scale and desk stakes.

Why it matters

The Bitaxe is proof that mining did not have to become a closed industrial monoculture. Its open hardware files mean anyone can manufacture, modify, or repair one, and its ecosystem — cases, heatsinks, stands, firmware forks — is community-built. D-Central Technologies is a pioneer in that ecosystem, having created the original Bitaxe Mesh Stand and developed many leading heatsinks, custom cases, and accessories; the credit for the platform itself belongs to the open-source Bitaxe project and its community. The Bitaxe represents the spirit of decentralized mining: anyone can participate.

Related terms: Open-Source Mining, AxeOS, Lottery Mining, ESP32, BM1366.