This is an amazingly designed little piece of technology. I will definitely be purchasing more. Elegantly constructed, and great functionality. Gordon is brilliant, and has done a great job implementing ecmaScript on hardware this way; truly inspiring.

The only snag has been the unfortunate conflict when broadcasting advertisements that it blocks the process for being able to connect and edit the code for the unit -- but this is a natural outcome of the circumstances involved. I do believe it can be improved, but users should be aware of the potential stumbling block.

Well designed product and the Espruino IDE results in a fast and efficient workflow. My main complaint is that the product was shipped with an old firmware and was basically useless prior to being updated. Once I found a video clip on YouTue on how to update it worked nicely with my Chromebook.

I couldn't get it working with my Windows laptop however and because of that I would have preffered to have a micro USB connector on the puck.js. That would hopefully also make it easier to work with BLE as you then could use the IDE for programmnig without interferring with Blueooth.

Despite this I still think this is an excellent little device.

Exactly what I needed. Arrived immediately. The community has already helped me a great deal as a newbie to this world. Bravo.

I do li-ion powered G-scale locomotive with remoote control. The brains of the loc is Espruino. The choice of Espruino is explained by:
- javascript, as I'm non profi-programmer but I do know JS and NodeJS and all my other systems are based on NodeJS
- Wifi on board
- arduino-like, with lot's of supproted modules
- good support from the web-site
- asynchronic languge (JS), I suppose it's the best solution for running different tasks simultaneously

And with exception that I killed two boards due to inproper wiring the board itself is quite stable.
If you wanna some pictures and video pls visite https://www.instagram.com/tsuprov/

Extremely fast and safe trackable shipment, very good quality, nice documentation and amazing support!