Does espruino support bonding with a pin?

Ok, just some more thoughts:

• Maybe try setting NRF.setSecurity({keyboard:1, mitm:1});
  
• You mention the PIN screen only shows when you try to write to a characteristic? How about removing the startBonding line and instead just trying to access the characteristic (but while listening for the passkeyRequest event)? It's possible that would be more successful at kicking off the bonding properly?