SRL SIM, the Smart Robo Lab Simulator, is a desktop app for learning electronics and embedded coding. Wire a circuit on the canvas, write the code, press Start and watch it run – then upload the same code to a real board.

WHAT YOU CAN DO • Build circuits from 260+ parts: LEDs, resistors, buttons, potentiometers, sensors, motors, servos, NeoPixels, 7-segment displays, OLED and LCD displays, shift registers, transistors, power supplies and meters. • Write Arduino C++ for the Uno, Nano and Pro Mini (real firmware on a cycle-accurate simulated ATmega328P), the Raspberry Pi Pico (real RP2040 firmware), and ESP32 / XIAO boards; or MicroPython and CircuitPython on ESP32 and Pico. • See it run: LEDs light, displays draw, servos turn, the serial monitor prints; press buttons and turn knobs while it runs. Scope, netlist, schematic and circuit warnings (missing resistors, short circuits, floating inputs, pin overloads). • Check your code without running it: errors with plain-language tips, warnings, and how much flash and RAM it uses. Libraries named by your #include lines are added and installed by themselves. • Upload to a real board over USB (Arduino, ESP32, Pico) with a clear step-by-step progress view. • 150+ ready examples, from "Blink an LED" to a 4×4×4 LED cube, OLED Pong, LCD projects and the Coco desk buddy robot. • Learn Electronics and Learn Coding: lessons and exercises checked on a simulated board. • 3D Viewer for STL, OBJ, 3MF and glTF files (each part of an STL in its own colour). • Ask Claude: your own Claude account can explain, fix or build the project with you (optional). • Your projects stay on your computer. Export all of them at once, import many files at once, open Wokwi projects and diagram.json files, and let an AI chat draw a circuit for you.

USB BOARDS To upload to a real board, allow USB access once: sudo snap connect srl-sim:raw-usb

Made by Smart Robo Lab – https://smart-robo-lab.vercel.app