[lwh007]

SOLUTION FOUND: It's not timer at all. Problem due to variable scope and lifetimes - correction shown below in red.

Don't you just love languages without explicit variable declarations....?

Unable to get Ao_timer to work with callback. Possibly due to something I don't understand about interaction between UI events, Ao_timer, and e32.Ao_lock() wait. Code works for 3 seconds and below, but nothing greater. Seems the timer only works if it expires while the GUI is still active.

#Running in PyS60 1.4.5 final
#Emulator S60 5th Edition SDK v 1.0
import appuifw
import e32
#
aTimer = e32.Ao_timer()
#Timer setting function
def menuMain():

data = appuifw.query(u"Seconds to Sleep?", "number")
#aTimer = e32.Ao_timer() VARIABLE LIFETIME ENDS WHEN def DONE!!
global aTimer
aTimer.after(data, aTimerRings)
appuifw.note(u"Timer set for " + str(data))
#e32.ao_yield() ##Does not seem to affect result

#
#Timer callback function
def aTimerRings():

appuifw.note(u"Ding!!!!", "info")
#e32.ao_yield() ##Does not seem to affect result

#
#Exit key handler
def exit_key_handler():

app_lock.signal()

#
#Houskeeping
appuifw.app.screen = "normal"
appuifw.app.menu = [(u"Main Menu", menuMain)]
app_lock = e32.Ao_lock()
t = appuifw.Text()
appuifw.app.body = t

#Run the program
appuifw.app.exit_key_handler = exit_key_handler
app_lock.wait()