{"id":26749572,"url":"https://github.com/digitalpetri/modbus","last_synced_at":"2025-05-14T18:05:03.498Z","repository":{"id":20697715,"uuid":"23981303","full_name":"digitalpetri/modbus","owner":"digitalpetri","description":"Modbus TCP,  Modbus TCP Security, Modbus RTU on Serial, and Modbus RTU on TCP for Java 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Central](https://img.shields.io/maven-central/v/com.digitalpetri.modbus/modbus.svg)](https://search.maven.org/#search%7Cgav%7C1%7Cg%3A%22com.digitalpetri.modbus%22%20AND%20a%3A%22modbus%22)\n\nA modern, performant, easy to use client and server implementation of Modbus, supporting:\n- Modbus TCP\n- Modbus TCP Security (Modbus TCP with TLS)\n- Modbus RTU on Serial\n- Modbus RTU on TCP\n\n### Quick Start Examples\n\n#### Modbus TCP Client\n```java\nvar transport = NettyTcpClientTransport.create(cfg -\u003e {\n  cfg.hostname = \"172.17.0.2\";\n  cfg.port = 502;\n});\n\nvar client = ModbusTcpClient.create(transport);\nclient.connect();\n\nReadHoldingRegistersResponse response = client.readHoldingRegisters(\n    1,\n    new ReadHoldingRegistersRequest(0, 10)\n);\n\nSystem.out.println(\"Response: \" + response);\n```\n\n#### Modbus RTU on Serial Client\n```java\nvar transport = SerialPortClientTransport.create(cfg -\u003e {\n  cfg.serialPort = \"/dev/ttyUSB0\";\n  cfg.baudRate = 115200;\n  cfg.dataBits = 8;\n  cfg.parity = SerialPort.NO_PARITY;\n  cfg.stopBits = SerialPort.ONE_STOP_BIT;\n});\n\nvar client = ModbusRtuClient.create(transport);\nclient.connect();\n\nclient.readHoldingRegisters(\n    1,\n    new ReadHoldingRegistersRequest(0, 10)\n);\n\nSystem.out.println(\"Response: \" + response);\n```\n\n### Maven\n\n#### Modbus TCP\n\n```xml\n\u003cdependency\u003e\n    \u003cgroupId\u003ecom.digitalpetri.modbus\u003c/groupId\u003e\n    \u003cartifactId\u003emodbus-tcp\u003c/artifactId\u003e\n    \u003cversion\u003e2.1.0\u003c/version\u003e\n\u003c/dependency\u003e\n```\n\n#### Modbus Serial\n```xml\n\u003cdependency\u003e\n    \u003cgroupId\u003ecom.digitalpetri.modbus\u003c/groupId\u003e\n    \u003cartifactId\u003emodbus-serial\u003c/artifactId\u003e\n    \u003cversion\u003e2.1.0\u003c/version\u003e\n\u003c/dependency\u003e\n```\n\n### Features\n\n#### Supported Function Codes\nCode     | Function | Client | Server\n-------- | -------- | ------ | ------\n0x01     | Read Coils | ✅ | ✅\n0x02     | Read Discrete Inputs | ✅ | ✅\n0x03     | Read Holding Registers | ✅ | ✅\n0x04     | Read Input Registers | ✅ | ✅\n0x05     | Write Single Coil | ✅ | ✅\n0x06     | Write Single Register | ✅ | ✅\n0x0F     | Write Multiple Coils | ✅ | ✅\n0x10     | Write Multiple Registers | ✅ | ✅\n0x16     | Mask Write Register | ✅ | ✅\n0x17     | Read/Write Multiple Registers | ✅ | ✅\n\n- raw/custom PDUs on Modbus/TCP\n- broadcast messages on Modbus/RTU\n- pluggable codec implementations\n- pluggable transport implementations\n\n### License\n\nEclipse Public License - v 2.0\n","funding_links":[],"categories":["Java"],"sub_categories":["Speech Recognition"],"project_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fdigitalpetri%2Fmodbus","html_url":"https://awesome.ecosyste.ms/projects/github.com%2Fdigitalpetri%2Fmodbus","lists_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fdigitalpetri%2Fmodbus/lists"}