ESP32 NodeMCU – Basic Interface Examples

 

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LED Grow using Button

LED glow using Button Input Method in While loop

gpio.config( { gpio=23, dir=gpio.OUT }, { gpio=0, dir=gpio.IN}) 
while(true)
do
   if (gpio.read(0)==0) then gpio.write(23, 1) 
   else gpio.write(23, 0) 
   end 
end

LED glow using Button Interrupt Method

gpio.config({gpio=23, dir=gpio.OUT})	--GPIO-23 as OUTPUT
gpio.trig(0, gpio.INTR_UP_DOWN,pin_interrupt_1) --GPIO-0 as INPUT
function pin_interrupt_1(level) 
	if (0 == gpio.read(0)) then
		gpio.write(23, 1)
   else
		gpio.write(23, 0)
    end
end

LED Blink using Timer

gpio.config( { gpio=23, dir=gpio.OUT }) 
ArunEworld_timer = tmr.create()
 ArunEworld_timer:register(1000, tmr.ALARM_AUTO, function() 
	if (gpio.read(23)==1) then gpio.write(23, 0)
	elseif (gpio.read(23)==0) then gpio.write(23, 1)
	end
 end)
ArunEworld_timer:start()

 

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