plc

Open-source telemetry dashboard. Supports UART, BLE, MQTT, Modbus, CAN Bus and more.

Web-based Process Visualization (SCADA/HMI/Dashboard) software

This is an IoT device communication protocol implementation client, which will include common industrial communication protocols such as mainstream PLC communication reading, ModBus protocol, and Bacnet protocol. This component is open source and free for life, using the most relaxed MIT open source agreement, you can modify and commercial use at will (commercial use please evaluate and test). 这是一个物联网设备通讯协议实现客户端，将会包括主流PLC通信读取、ModBus协议、Bacnet协议等常用工业通讯协议。本组件终身开源免费，采用最宽松的MIT开源协议，您可以随意修改和商业使用（商业使用请做好评估和测试）。

ThingsGateway is a cross-platform, high-performance gateway for edge data acquisition and IoT connectivity. Developed with .NET 8, it offers a suite of powerful tools, including advanced PLC communication libraries and debugging software.

Open source industrial connectivity server

IoT DC3 is a multi-protocol, cloud-native, AI-powered, open-source industrial IoT platform evolving toward AI agents. A complete IoT system solution: device connectivity, data acquisition, edge-to-cloud delivery and intelligent operations.

Modbus TCP, Modbus UDP and Modbus RTU client/server library for .NET implementations

This C library provides a portable and simple API for accessing Allen-Bradley and Modbus PLC data over Ethernet.

物联大师是开源免费的物联网平台，集成了标准Modbus和主流PLC等多种协议，支持数据采集、公式计算、定时控制、自动控制、异常报警、流量监控、Web组态、远程调试等功能，适用于大部分物联网和工业互联网应用场景。

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

Modbus TCP and RTU, Master and Slave for STM32 using Cube HAL and FreeRTOS

Read/Write data from Allen Bradley Compact/Control Logix PLC's

A Python Ethernet/IP library for communicating with Allen-Bradley PLCs.