https://github.com/stephane/modbusino

Small Modbus slave, RTU (serial) for Arduino
https://github.com/stephane/modbusino

Last synced: 3 months ago
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Small Modbus slave, RTU (serial) for Arduino

• Host: GitHub
• URL: https://github.com/stephane/modbusino
• Owner: stephane
• License: isc
• Created: 2011-04-13T07:36:51.000Z (over 13 years ago)
• Default Branch: master
• Last Pushed: 2022-03-21T14:18:42.000Z (over 2 years ago)
• Last Synced: 2024-06-30T16:55:28.898Z (4 months ago)
• Language: C++
• Homepage: http://libmodbus.org
• Size: 34.2 KB
• Stars: 142
• Watchers: 31
• Forks: 94
• Open Issues: 8
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

Awesome Lists containing this project

• Awesome-arduino - modbusino - Small Modbus slave, RTU (serial) for Arduino (Libraries)
• awesome-arduino - modbusino - Small Modbus slave, RTU (serial) for Arduino (Libraries)

README

        
Modbusino

=========

Introduction

------------

Modbusino is a ISC licensed library to handle Modbus requests on Arduino

(slave).

Features

--------

To keep it simple and to reduce memory consumption, only the two following

Modbus functions are supported:

* read holding registers (0x03)

* write multiple registers (0x10)

Example

-------

```c

#include 

/* Initialize the slave with the ID 1 */

ModbusinoSlave modbusino_slave(1);

/* Allocate a mapping of 10 values */

uint16_t tab_reg[10];

void setup() {

    /* The transfer speed is set to 115200 bauds */

    modbusino_slave.setup(115200);

}

void loop() {

    /* Initialize the first register to have a value to read */

    tab_reg[0] = 0x1234;

    /* Launch Modbus slave loop with:

       - pointer to the mapping

       - max values of mapping */

    modbusino_slave.loop(tab_reg, 10);

}

```

Contribute

----------

I want to keep this library very basic and small so if you want to contribute:

1. Check for open issues or open a fresh issue to start a discussion around a feature idea or a bug.

2. Fork the [repository](https://github.com/stephane/modbusino/) on Github to start making your changes on another

   branch.

3. Send a pull request (of your small and atomic changes).

4. Bug the maintainer if he's too busy to answer :)