iOS Notifications Error - Puck.js - Solved (clear your iOS bluetooth cache when you update your services)

Okay - got it solved! It was due to the iOS Bluetooth caching. Since I had connected to the device at some point, it cached the initial service and characteristics (which were only read). I did try turning Bluetooth off at the swipe down menu but this apparently did not clear it.

To clear the iOS bluetooth cache I do this:

• settings > Bluetooth > Turn off - wait a bit, turn back on
  
  

This did the trick, and now setting notify works correctly, and I get notifications! Woot - go espruino!