Literally, ATtiny85 is a scaled-down version of the Atmega microcontroller on Arduino boards with just a few I/Os (five usable pins) that can listen to or talk to most sensors and transducers.

In a previous article, we looked at connecting various kinds of Arduino hardware to your Mac. Here's how to get started programming on them to create your own projects.

Programming the Raspberry Pi Pico with Arduino IDE The tutorial on Hackster.io provides a comprehensive guide on how to program the Raspberry Pi Pico using the Arduino IDE.

Here's her answer: It's a custom board we've designed based off the Arduino Leonardo, which despite the customizations to the bootloader is still compatible with using the standard Arduino IDE.

Although there is already an Arduino Wi-Fi shield the WifiDuino device has been designed with a smaller form factor in mind, is more reasonably priced and has been created to be a lot easier to use.

For beginners learning to program Arduinos, a web-based, fully networked developer environment called Codebender could drastically reduce the learning curve.