Snap4Arduino was a Snap! extension, a full Snap! implementation to interact with the physical world, through many types of electronic devices, especially those compatible with Arduino. Starting with Snap! v11, the S4A Connector library is doing this job.
Snap! is a broadly inviting programming language for kids and adults that's also a platform for serious study of computer science. It is inspired by Scratch, written by Jens Mönig and Brian Harvey and presented by the University of California at Berkeley.
Snap4Arduino requiere boards with Firmata firmware installed. Check devices section.
Just download, unpack/unzpip and click Snap4Arduino.
Choose your system: Windows 64 (or its portable option), GNU/Linux 64, MacOSX, Windows32 (or its portable) or GNU/Linux 32.
Install Snap4Arduino connector and then, just play Snap4Arduino online (you can install it as an app from the browser to run it offline).
Chromium/Chrome/Edge browsers are required
Download Snap4Arduino connector, unzip its crx folder, type chrome://extensions, select Developer mode and Upload an unpacked extension selecting that crx file (or just drag and drop it).
Just play Snap4Arduino online (you can install it as an app from the browser to run it offline).
Play online
Plugin for Chromebooks (chrome web store)
Chrome/Chromium/Edge plugin (download extension)
Last Snap4Arduino version is 10.3.6 (released on 08/01/2025) and its Snap4Arduino connector version (chrome extension)is 8.0
You can also find older releases and unmaintained versions
Snap4Arduino requires boards with Firmata firmware uploaded.
You can upload Firmata firmwares direcly from Snap4Arduino (with both desktop and online versions) to UNOs compatible boards. Or just here:
A lot of devices support Standard Firmata. Tested on Nano, Mega, Leonardo and Micro.
Many 32 bit devices support Firmata. Tested on Due, 101, ESP8266 and NodeMCU.
Standard Firmata is directly uploadable with any Arduino IDE.
Other options are: SA5Firmata, Creative Robotix Firmata, MC Firmata Collection, Robotics-unleashed, Snap4ArduinoDev, LCD Firmata and Ultrasound Firmata
: It offers tools to create backups of profiles and configuration files, making it easy to restore progress if a mod causes a crash.
Custom launchers have a dual effect. Positively, they push SCS to improve their own launcher—recent official updates added better mod management and startup options. Negatively, launchers that enable piracy reduce potential revenue for SCS, which in turn funds free updates like the Germany rework or new truck licenses.
The “ETS2 7Launcher” exemplifies the ingenuity and risk-taking of the ETS2 modding community. While it may offer genuine quality-of-life improvements for power users, its association with DRM circumvention and potential instability makes it a controversial tool. For most players, the official Steam launcher—combined with trusted mod managers like Mod Manager 2 or ETS2 Mod Manager —provides sufficient flexibility. However, the existence of launchers like 7Launcher reminds us that in PC gaming, the line between empowerment and violation is often drawn not by code, but by community norms and developer goodwill.
You can find our GitHub repo at Snap4Arduino@GitHub. Please feel free to send us your pull requests and participate in reporting, fixing or commenting on bugs!
: It offers tools to create backups of profiles and configuration files, making it easy to restore progress if a mod causes a crash.
Custom launchers have a dual effect. Positively, they push SCS to improve their own launcher—recent official updates added better mod management and startup options. Negatively, launchers that enable piracy reduce potential revenue for SCS, which in turn funds free updates like the Germany rework or new truck licenses.
The “ETS2 7Launcher” exemplifies the ingenuity and risk-taking of the ETS2 modding community. While it may offer genuine quality-of-life improvements for power users, its association with DRM circumvention and potential instability makes it a controversial tool. For most players, the official Steam launcher—combined with trusted mod managers like Mod Manager 2 or ETS2 Mod Manager —provides sufficient flexibility. However, the existence of launchers like 7Launcher reminds us that in PC gaming, the line between empowerment and violation is often drawn not by code, but by community norms and developer goodwill.