Driving an Undocumented 3nm ASIC with an ESP32: Inside the First Sub-10 J/TH Open-Source Bitcoin Miner

说明与用途

ESP32‑S3 驱动未公开文档的 3nm BM1373 ASIC，提供完整控制和 REST API 监控，标准模式下 4.4 TH/s，功耗 9.5 J/TH，超频可达 11.6 TH/s。

问题

A $3 microcontroller must control Bitmain’s undocumented 3nm BM1373 ASIC, which lacks datasheets, firmware, or SDKs.

结果

The ESP32‑S3 can fully control the BM1373 ASIC, achieving 4.4 TH/s at 9.5 J/TH in stock mode and up to 11.6 TH/s with overclocking, while providing per‑chip telemetry via a REST API.

工作流

• Discover chips on the bus and wake them up
• Negotiate baud rate to reach operational speed
• Write registers to set frequency and core voltage
• Distribute block header work across chips
• Collect and map nonce results back to work

证据

The esp‑miner firmware (GPL‑3.0, maintained by the Open Source Miners United community) packages it into something an ESP32‑S3 can run: chip drivers, a stratum client, a self‑hosted web UI (AxeOS), and a REST API for telemetry.

来源

Stock is 327 MHz / 1,000 mV: 4.4 TH/s at ~42 W, the efficient point on the curve.

来源