Platformă hardware–software pentru controlul instrumentelor din seria Keithley 2400 [Articol]

Abstract

This paper presents the development of a hardware–software platform designed for controlling and monitoring devices from the Keithley 2400 SourceMeter series. The system uses a laboratory-designed hardware adapter based on the ATmega328P microcontroller for serial–parallel conversion and an ESP32-C3 module for managing network communication and transmitting commands according to the GPIB (IEEE-488) protocol. The software platform includes a web interface accessible both locally and remotely through Wi-Fi connectivity and a centralized server. The system implements two access levels—administrator and standard user—allowing configuration of internal parameters, sending GPIB commands, executing tests, and viewing system logs. For secure access, the application employs unique authentication tokens, packet integrity verification, and automatic restriction of unauthorized IP addresses. The application enables measurement reading in multimeter mode, automatic saving to CSV files, real-time graph generation, and communication error diagnostics. Additionally, the system can operate as a programmable source, supporting both potentiostatic and galvanostatic modes, making it suitable for electrochemical applications, automated testing, and remotely controlled experiments. The results confirm the stability of the GPIB communication, the expandability of the platform, and its integration potential within modern laboratory infrastructures.