Open Source! Implementation of Industrial Internet Communication Library Protocols, Including Mainstream PLC, ModBus, CIP, MC, FINS

Implementation of Industrial Internet Communication Library Protocols

Source Code

https://www.gitpp.com/chijiaodaxian/project080iot-comm

Includes mainstream protocols such as PLC, ModBus, CIP, MC, FINS, etc., allowing simple data interaction through various channels (TCP, UDP, MQTT, USB, Bluetooth…).

Great utility

In-depth Analysis of Open Source Industrial Internet Communication Library Protocols: The Foundation for Cross-Protocol and Cross-Channel Industrial Data Interaction

1. Core Value of the Project: Breaking Down Industrial Communication Barriers for Seamless Device Interconnection

This open-source project supports mainstream PLC protocols (Siemens S7, Mitsubishi MELSEC, Omron FINS, etc.), ModBus, CIP (ControlNet/DeviceNet), MC (Mitsubishi proprietary protocol) and is compatible with TCP, UDP, MQTT, USB, Bluetooth, addressing the pain points of protocol fragmentation and data silos in industrial scenarios. Its value is reflected in:

Protocol Standardization:

In traditional industrial systems, devices from different manufacturers (such as Siemens PLCs and Mitsubishi inverters) use proprietary protocols, requiring custom development for integration. This project abstracts the protocol layer, providing a unified API interface, allowing developers to achieve cross-brand device communication without needing to deeply understand the underlying protocol details.
Case Study: In smart mining, it can simultaneously connect Siemens S7-1200 PLC (controlling crushers), Mitsubishi MELSEC-Q series PLCs (monitoring conveyor belts), and ModBus RTU sensors (collecting dust concentration), achieving centralized data processing.

Flexible Adaptation of Transmission Channels:

High Reliability Scenarios: Underground equipment transmits safety data via wired TCP/IP networks;
Mobile Device Scenarios: Mining trucks upload location information to the cloud via MQTT;
Temporary Debugging Scenarios: Engineers connect handheld terminals via Bluetooth to quickly read device status.

Supports wired (TCP/UDP/USB) and wireless (MQTT/Bluetooth) mixed transmission, adapting to the diversity of industrial scenarios. For example:

Open Source Ecosystem Empowerment:

Fully open-source code supports secondary development, reducing the transformation costs of small and medium-sized enterprises in the industrial internet. For example, it can be extended to support Profinet, EtherCAT, or customize private encryption transmission modules.

2. Technical Architecture: Layered Design to Achieve Decoupling of Protocols and Channels

The project adopts a protocol abstraction layer + transmission channel layer + application interface layer layered architecture, ensuring high scalability and low coupling:

Protocol Abstraction Layer:

The “holding register” of ModBus and the “DB block” of Siemens S7 can be mapped to the same logical address;
The “frame header check” of Mitsubishi FINS and the “connection ID” of CIP are automatically handled by the protocol layer.

Defines a unified data model (such as register address mapping, data type conversion), shielding differences between protocols. For example:

Transmission Channel Layer:

The MQTT channel supports QoS level configuration to ensure reliable transmission of critical data;
The Bluetooth channel implements low-power near-field communication, suitable for mobile inspection devices.

Encapsulates the underlying details of TCP/UDP/MQTT channels, providing asynchronous communication, reconnection, data encryption, and other common functions. For example:

Application Interface Layer:

Python Example: Read ModBus device data using the <span>read_holding_registers()</span> method without worrying about TCP handshake or CRC checks;
C++ Example: Monitor changes in the “DB1.DBW0” variable of Siemens S7 to trigger alarm logic.

Provides multi-language SDKs such as C/C++/Python, supporting callback functions, event subscriptions, and other programming models. For example:

3. Typical Application Scenarios: Covering Industrial Full-Chain Communication Needs

Smart Mining:

Equipment Monitoring: Connect underground PLCs, sensors, and cameras to collect real-time data on gas concentration, equipment temperature, etc., and upload it to the cloud for analysis via MQTT.
Remote Control: Issue commands through TCP channels to start/stop crushers, avoiding personnel entering hazardous areas.
Mobile Inspection: Engineers connect handheld terminals via Bluetooth to read parameters from distribution cabinets, synchronizing data to large screen systems.

Smart Manufacturing:

Production Line Integration: Unified connection of different brand robots (such as KUKA, FANUC), AGV carts, and CNC machine tools to achieve production data interoperability.
Flexible Production: Quickly switch protocol configurations to adapt to multi-variety, small-batch order demands, reducing downtime for line changes.

Energy Management:

Photovoltaic Power Stations: Collect data from inverters (ModBus TCP) and electric meters (DL/T 645 protocol) to optimize power generation efficiency.
Smart Grid: Monitor substation equipment via FINS protocol, using AI algorithms to predict faults and proactively schedule maintenance resources.

4. Comparison with Similar Open Source Projects: Differentiated Advantages

Project	Protocol Support	Transmission Channels	Advantage Scenarios
This Project	PLC (S7/MELSEC/FINS) + ModBus + CIP + MC	TCP/UDP/MQTT/USB/Bluetooth	Cross-brand device integration, mixed transmission needs
modbus_rt	ModBus RTU/ASCII/TCP	TCP/UDP/RTU-over-TCP	Pure ModBus device scenarios
PLC4X	S7/ModBus/OPC UA/BACnet	TCP/UDP	Standardized access to industrial protocols
iot-communication	S7/MELSEC/ModBus/RTSP	TCP	Video monitoring and PLC collaboration

Core Advantages of This Project:

Most Comprehensive Protocol Coverage: Supports mainstream protocols in the industrial field such as PLC, ModBus, CIP, avoiding the complexity of multi-library collaborative development;
Highest Channel Flexibility: The only project that supports both MQTT (cloud) and Bluetooth (near-field) simultaneously, adapting to all scenarios of industrial IoT;
Lightweight Design: The core library is less than 5MB, capable of running on embedded devices (such as Raspberry Pi), reducing deployment costs.

5. Future Outlook: Promoting Standardization and Intelligence of Industrial Communication Protocols

Protocol Integration:

Explore new technologies such as OPC UA over MQTT and Time-Sensitive Networking (TSN) to achieve deep integration of IT/OT.

AI Empowerment:

Integrate anomaly detection algorithms to automatically identify communication faults (such as packet loss, protocol mismatch), enhancing the system’s self-healing capabilities.

Security Enhancement:

Add TLS encryption and device identity authentication modules to meet the security requirements of Level 2 for industrial internet.