...
Configure the timer to fire every TsSlotDuration. If you have the debug pins in place, you should see a screen similar to the following on your scope:
(source file at before_connected.prj)
...
- on your sniffer, one ADV packet sent every second, abiding to the ADV packet format;
- on your scope, you should see that the ADV is sent TsTxOffset into the slot, as per the illustration below.
(source file at nine_slots_final.prj)