A two-node measurement prototype for situations where a wall blocks the obvious path.

Twain uses ESP32 microcontrollers and ultra-wideband ranging to estimate the separation between two locations when a physical barrier prevents a normal direct line-of-sight measurement. One node is placed at each relevant position, turning a difficult physical measurement into a wireless ranging problem.

• Built as a construction-oriented proof of concept rather than a claimed production instrument.
• Combines embedded firmware, ESP32 hardware, UWB ranging, sensor integration, and physical testing.
• Shows how Anson approaches field constraints by reframing the measurement problem around communicating reference nodes.
• No public production accuracy, commercialization, or deployment result is claimed.