Data and code for: Rail asymmetry as an input offset: an exact duty-cycle modulation law and two-point physical calibration for microcontroller-based sensing

Bench sweep of a non-inverting duty-cycle modulator, complete on-board logs of an ESP32-S3 microcontroller (temperature and voltmeter applications), fixed-input noise-floor sessions for two edge-capture backends on two days, two on-board two-point calibration sessions, three online-calibration runs, the firmware releases that recorded these data, a reference firmware release limited to the method of the paper, the C source of the capture module, and the scripts that reproduce every number and new figure of the paper. Licences: CC BY 4.0 for data (data/, results/), MIT for code and firmware (code/, firmware/); see LICENSE.