gijzelaerr / python-snap7

a pure Python S7 communication library for interfacing with Siemens S7 PLCs

agentthink / sim-foundry

一台电脑即可虚拟出整套工业现场设备，无需采购 PLC、摄像头、传感器等实物硬件，面向工控、网关、上位机、物联网平台开发测试人员，解决 “开发调试被硬件到货周期卡住” 的行业痛点。

cramen / modbus_connector

Cross-platform Modbus toolkit (PySide6): master client with register table, polling, live graphs, alarms and bus scanner; device simulator (slave) with register map and expression rules; passive RTU sniffer. EN/RU UI.

slickz44 / DT_PSA_OPCV_Siemens

Siemens TIA Portal PLC and HMI implementation for the DT_PSA_OPCV digital twin