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Insights

Engineering deep-dives and regulated-industry explainers from the team behind A1SI’s products.

The A1SI Bluetooth-to-RS232 bridge adapter — a DB9 serial connector, status LEDs, and a USB power input — the class of ESP32 device that carries Modbus RTU over Bluetooth Low Energy.

Insight

BLE and Modbus Over One Bridge: The Architecture Behind A1SI-CVWS

How an ESP32 bridge carries industrial Modbus RTU traffic from a load cell over Bluetooth Low Energy to a phone — and the design decisions that keep the data path honest under real-world conditions.

Marcus SteinJune 25, 2026

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The EMDT Compliance Audit Trail: a filterable, CSV-exportable log of changes with timestamp, action, record type, field, old and new value, user, and reason columns — exactly the kind of computer-generated, time-stamped record 21 CFR Part 11 requires.

Insight

What 21 CFR Part 11 Actually Requires from a Device-Tracking System

A plain-language walk through FDA 21 CFR Part 11 — electronic records, electronic signatures, and audit trails — and what those rules mean for software that tracks regulated medical devices.

Luna VasquezJune 24, 2026

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