"They have to use an ARM CPU to get enough power to support Javascript, but ARM CPUs are cheap now." Hum, I might but wrong but I don't think javascript code i

"They have to use an ARM CPU to get enough power to support Javascript, but ARM CPUs are cheap now." Hum, I might but wrong but I don't think javascript code is actually executed on the chip. I haven't checked but the javascript is probably transpiled to something else (Lua ?) or a higher level binding to a library that calls function of a C firmware loaded on the chip. The node.js module johnny-five + the Firmata firmware gives your the later for Arduino.