Is it possible to sync Bangle.js 2 time to smartphone time?

Now that that is fixed I'm finally starting to get stable clock drift measurements. Current code can measure Bangle.js 2 clock drift in just 5 minutes somewhat accurately, usually giving 61-69 ppm for me, with occasional worse values.

Basic idea:

• Raspberry Pi broadcasts time once per second with microsecond resolution.
  
• Bangle.js 2 scans for time broadcasts in bursts, getting 4-5 time-deltas in one burst.
  
  • Largest time-delta is discarded and average of the rest is taken.
    
• Clock drift is calculated from two time-delta-averages separated by 5 minutes.