High-performance, non-blocking, zero-buffer-copying Modbus for Java.

Quick Start

ModbusTcpMasterConfigconfig = newModbusTcpMasterConfig.Builder("localhost").build();
ModbusTcpMastermaster = newModbusTcpMaster(config);
master.connect();
CompletableFuture<ReadHoldingRegistersResponse> future =
master.sendRequest(newReadHoldingRegistersRequest(0, 10), 0);
future.thenAccept(response -> {
System.out.println("Response: " + ByteBufUtil.hexDump(response.getRegisters()));
ReferenceCountUtil.release(response);
});

See the examples project for more.

Maven

Modbus Master

<dependency>
<groupId>com.digitalpetri.modbus</groupId>
<artifactId>modbus-master-tcp</artifactId>
<version>1.2.0</version>
</dependency>

Modbus Slave

<dependency>
<groupId>com.digitalpetri.modbus</groupId>
<artifactId>modbus-slave-tcp</artifactId>
<version>1.2.0</version>
</dependency>

Supported Function Codes

Code	Function
0x01	Read Coils
0x02	Read Discrete Inputs
0x03	Read Holding Registers
0x04	Read Input Registers
0x05	Write Single Coil
0x06	Write Single Register
0x0F	Write Multiple Coils
0x10	Write Multiple Registers
0x16	Mask Write Register
0x17	Read/Write Multiple Registers

Get Help

See the examples project or contact kevinherron@gmail.com for more information.

License

Apache License, Version 2.0