EspruinoWiFi module builtin?

Hopefully this new flash storage thing will open things up. At the very least you'll be able to put your WiFi credentials in setBootCode and have your code saved normally, but potentially we could also have a file for predefined variables that gets loaded automatically.

You probably know this, but if you do onInit() { wifi.on('connected', function() {}) } then each time onInit gets called (eg, if you save() twice) you'll get another handler. Just having the on('connected') outside onInit would be fine.