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Espruino is a JavaScript interpreter for low-power Microcontrollers. This site is both a support community for Espruino and a place to share what you are working on.
@Wilberforce
Im not sure what limitations you are referring to?
I2c, onewire and spi work fine. Pwm is not supported in hardware, so is done in software.
Here is an example of spi driving a Nokia display:
http://forum.espruino.com/conversations/287196/#comment13070259
The limitation with the board really is lack of ram - this limits your code size.
What is it you intend to do?