---
title: "Settimino"
url: "https://maker.wiznet.io/teddy/projects/Settimino/"
markdown_url: "https://maker.wiznet.io/teddy/projects/Settimino/md"
type: "UCC: User Created Content"
author: "teddy"
author_url: "https://maker.wiznet.io/teddy/"
original_author: "teddy"
original_url: "http://settimino.sourceforge.net/"
published: "2022-07-26"
language: "en"
likes: 0
views: 273
comments: 0
source: "WIZnet Makers (https://maker.wiznet.io/)"
---

# Settimino

> Settimino

Original author: teddy (source: http://settimino.sourceforge.net/)

## Article

**Project overviewSettimino**?is an open source Ethernet library for interfacing?**ARDUINO™**?/?**ESP8266?NodeMCU**?/?**ESP32?**natively with?**Siemens S7™?**PLCs. The CPUs 1200/1500 LOGO 0BA7 and S7200?are also supported.

Settimino?is not strictly “the porting” of Snap7 for ARDUINO because, although it runs fine in small boards such Raspberry™, its design (multiplatform 32/64 bit) is too exacting for a tiny 8 bit board. I rewrote the Snap7 micro-client by optimizing its footprint to be suitable with Arduino.

**Main?**features

**?**

- Full PLC memory access.

- PDU independence, i.e. the data that you can transfer in a single call depends only on the Arduino memory availability.

- Helper functions for data conversion (Big Endian --> Little endian)

- Three?memory models for footprint optimization.

- Uses standard Arduino Ethernet library i.e. it can coexist with other clients/servers in the same sketch.

- 3?ms?to read a PDU into the internal buffer, 24?ms?for 1024 bytes into the external.

## What do you need

To work with?Settimino?you need (see § Compatibility for details):

- An?**ARDUINO?**equipped with an Ethernet shield (with W5100) in which to load the examples supplied.

- Alternatively, a?**NodeMCU**?board or?**Esp32 board (from V2.0.0)**

- A Siemens PLC equipped with Ethernet port or Communication Processor.

Any PLC?is supported?except for the old S5 family.

Or, if you don’t have it, download?**Snap7**?project (see below).

The Snap7 Library is not strictly required but I suggest you to download it (it’s?free of course) because it contains:

- A?ready to run Client Demo (Win/Unix/BSD/Solaris) that allows you to see if what you are transferring is correct without the needing of?Simatic?Manager.

- A?ready to run Server Demo (same platforms) that emulates a S7300 PLC equipped with Ethernet adapter?**that allows you to test your?Settimino?based applications without having a physical PLC**.

Even this documentation is derived from that of?Snap7,?visit its homepage for a more detailed information.

http://snap7.sourceforge.net/ https://sourceforge.net/projects/settimino/files/

---

Source: https://maker.wiznet.io/teddy/projects/Settimino/