Normaly with 2stroke I start at 5 degrees BTDC for the first 1000rpm.
At 1000 rpm back to factorysetting of ~28 degrees and at high rpm the ignition is allmost back to 5 degrees.
With other words, I need for good tuning ~ 30 degrees for settings.
4 stroke need less, but 10 or 15 degrees workspace will be normal.
Start at 30 degrees BTDC + 15 degrees advance = 45 degrees BTDC (normaly it will be ~42 degrees BTDC)
If you set your hallsensor at 30 degrees, I don't think it can be work.(?)
You have allways set you hallsensor befor the ignitiontime, back calculate to ignite is hard todo.
Thats also why professional race cdi use two sensors, one at TDC and one e few degrees befor high rpm ignitiontime.
Maybe a option in next hard- softwareware version ?