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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.
@tom.gidden
Agreed, but I'd still prefer having to get a modern Mac, iPhone, developer subscription and programming a little Javascript than having to get a modern Mac, iPhone, developer subscription, Nordic Eval Kit, a copy of Windows to be able to run Keil OR lose a good deal of hair trying to get GCC configured, and then have to spend tonnes of time trying to decipher the nrf51 SDK.
Unusually in this case, writing the phone app is probably one of the easier and better-documented parts of the process!