IsolaRail
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      • Hardware and firmware docs for an isolated USB hub

      One clear path from product intent to bench bring-up.

      IsolaRail is a four-port isolated USB hub project built around ESP32-S3, CH335F, TCA6408A, INA226/TPS2490, M24C64, and a 160x50 front-panel display path. This site is organized by hardware, firmware, control plane, and specification index so the product boundary and current engineering truth stay connected.

      Start bring-upRead hardware topologySpecs index
      ControlESP32-S3boot, self-check, front panel
      USB hubCH335Fsideband power control
      I2C buses and monitorsTCA6408A · INA226 · TPS2490 · M24C64
      port1port2port3port4
      160x50 displaydashboard state surface
      Real photo reservedBoard, front-panel, or bench bring-up photography goes here when hardware evidence is available.
      Hardware topologyVIN, four USB power modules, I2C topology, and front-panel input.Firmware startupBoot init, self-checks, output gating, front panel, and fan path.160x50 DashboardFour-column status, power bars, fault states, and display assets.

      Read by topic

      Quick Start

      Install the toolchain, build firmware and docs, and verify the local companion path.

      Hardware Topology

      Start from VIN, CH335F sideband, EN gating, the two I²C buses, and the front panel.

      Control Plane

      Understand isolarail, isolarail-devd, USB JSONL, Web companion, and device operation boundaries.

      Current truth: the site curates and publishes; canonical engineering truth remains in docs/ and docs/specs/.