Running Arduino code in browser – Wasmino #Arduino #WebAssembly
Wasmino is an Arduino core fully compatible with the Arduino IDE. It allows you to compile your Arduino sketch to WebAssembly and run it in a browser, all using the Arduino IDE.
Some caveats:
The Wasmino should be viewed as having an infinitely fast CPU, and operations other than delay and delayMicroseconds do not take any CPU time. Calling time functions micros and millis should reflect this. IO can only happen during sleep, therefore you cannot do
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while (!digitalRead(2)) {} // this will hang the browser tab
and should do this instead
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while (!digitalRead(2)) {
delay(50);
}
Having a infinitely fast CPU also means that interrupts will only happen during delay and delayMicroseconds. It is still good practice to use noInterrupts and interrupts to protect critical sections if you plan to use your code on real hardware.
Other caveats exist such as the lack of BUILTIN_LED macro since Wasmino, being virtual, doesn’t have a built-in LED.
Stop breadboarding and soldering – start making immediately! Adafruit’s Circuit Playground is jam-packed with LEDs, sensors, buttons, alligator clip pads and more. Build projects with Circuit Playground in a few minutes with the drag-and-drop MakeCode programming site, learn computer science using the CS Discoveries class on code.org, jump into CircuitPython to learn Python and hardware together, TinyGO, or even use the Arduino IDE. Circuit Playground Express is the newest and best Circuit Playground board, with support for CircuitPython, MakeCode, and Arduino. It has a powerful processor, 10 NeoPixels, mini speaker, InfraRed receive and transmit, two buttons, a switch, 14 alligator clip pads, and lots of sensors: capacitive touch, IR proximity, temperature, light, motion and sound. A whole wide world of electronics and coding is waiting for you, and it fits in the palm of your hand.
Have an amazing project to share? The Electronics Show and Tell is every Wednesday at 7pm ET! To join, head over to YouTube and check out the show’s live chat – we’ll post the link there.
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