ARM Cortex microcontrollers are incredibly powerful 32-bit computers - many not larger than the size of a fingernail, and able to sleep with just a few µA of current draw. There’s a whole bunch of cheap little boards on eBay so you don’t even have to get your soldering iron to have a lot of fun with ‘em:
But there’s a catch: you also need a way to connect to them, and you need the proper toolchain to write code for them and upload it into the chips.
↧