function update_display()
	disp:clearBuffer()
	disp:drawStr(0, 0*lineH, dstr)
	disp:drawStr(0, 1*lineH, tstr)
	--disp:drawStr(0, 2*lineH, "test")
	disp:sendBuffer()

	display_tmr:start()
end

-- set up timer for display update
display_tmr=tmr.create()
display_tmr:register(display_update_interval, tmr.ALARM_SEMI, function() update_display() end)

print("--- Starting Display Updates ---")
display_tmr:start()