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This is a Modbus RTU Slave over I2C Shield. It mounts the dedicated IS4310 Modbus stack chip.

IS4310 Evaluation Board: Modbus RS485 Slave

Sold by Inacks store

$17.39

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Stock available: 20
Home automation
STM32
Arduino

The Kappa4310Ard is an evaluation board for the IS4310 Modbus chip. It enables engineers to easily evaluate the IS4310 without the need for soldering or developing their own prototype—offering a ready-to-use solution. The board features an RGB LED and a potentiometer to simulate an actuator and a sensor.

Designed as a shield with the Arduino form factor, the Kappa4310Ard benefits from its widespread popularity, ensuring compatibility with various microcontroller boards, including Arduino and STM32 Nucleo Boards, among others. The board features an RS485 electrical interface and includes two daisy-chained RJ45 connectors for seamless integration.

The IS4310 is an ideal solution for ensuring Modbus protocol timing constraints, reducing CPU load, and eliminating the need for dedicated pins. It includes 500 Holding Registers for engineers to use and supports Function Codes 3 (0x03), 6 (0x06), and 16 (0x10).

Links to code and documentation

Documentation (inacks.gitbook.io)

Code (github.com)

Shipping policy

We ship all products from Barcelona via Correos within 1 to 3 business days, with a tracking number.

Delivery usually takes a few days to a week within Europe, and around one week for the rest of the world.

Here are some extras that might be useful for your project!
This chip implements the Modbus stack for this module

The seller

Inacks store

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Terrassa, Barcelona, Spain
1 order since May 12, 2025
We find communication protocols beautiful.
Implementing them as stacks inside chips connects us to the mindset of the engineers who designed them. You can feel the passion they put into solving communication challenges — whether it's for industrial systems, lighting, or sound.
But when you're building your own project, diving into protocol implementation can eat up a lot of engineering time (or your client's budget!).
So why not save that time and focus on what truly makes your product unique — instead of reinventing the wheel?