timer.start(period)
Starts the timer with the given period in seconds. The period must be ≥ 0.01 (10 ms). If the timer is already running when this routine is called, the timer is reset to the new period.
Introduced in platform.apiLevel = '1.0'
Caution
timer.start() should not be called when processing an on.timer() event unless it is the final statement before the on.timer() event completes.