MDBT42Q code lost upon power cycle

I tried out the demo code on the individually addressable led page listed at http://www.espruino.com/Individually+Addressable+LEDs
The code worked great, but when I disconnect/reconnect power, the code does not run. I can upload the code again, but it doesn't appear to save the code when its power cycled. Is this normal behavior of the MDBT42Q?

Thanks for your help

Did you enter save() in the console - left side in the IDE after upload?

...one more thing:

make the last two lines of the your code like this (put the original last two lines into onInit() {...}; function in order to not save messed status.

onInit() {
  setWatch(changePattern, BTN, { repeat: true, edge:'falling' });
  setInterval(doLights,50);
}

With that change though, the code will not start on upload. This is annoying while you devleop... If you add this line as a very last line while you develop and when ready to save it, just comment this line before the upload.

setTimeout(onInit,500); // while dev'g - comment before upload for save()

I hope this helps.

PS: How do you get rid of saved code - prevent it from automatically starting?

When connected, inter in the console reset(1) . This will not only stop the code but also remove it from FLASH, so that a next time you power cycle, it is not there anymore to be run.

If you want stop a piece of code, you just say reset() without argument.

http://www.espruino.com/Saving will explain the whole save process in a bit more detail if you're interested