Surely you meant to set lastTime when you switch the LED on, and not after you switch it off, otherwise you are switching if off every 100ms without any synchronization to the point where its switched on. You want the LED on for 100ms every 250ms?
Surely you meant to set lastTime when you switch the LED on, and not after you switch it off, otherwise you are switching if off every 100ms without any synchronization to the point where its switched on. You want the LED on for 100ms every 250ms?