Connecting using Windows 10

You can npm install -g espruino and can then do espruino -p /dev/your-device -w yourfile.js

You then get a console window to Espruino, but every time you write to the js file it'll auto-upload to Espruino. I'm afraid an Atom plugin's just too much effort for me, especially as trying to get 'native' JS modules (like are needed for serial and BLE) running under Electron is a nightmare, and I don't think many people would get far with it.