ESP8266 NodeMCU Interface – LED

LED ON/OFF

Note : Assume the pin GPIO-5 is a LED (NodeMCU pin map is 1)

  • Set LED Mode
    • Set LED pin (gpio-5) as output using gpio.mode(pin, mode [, pullup])  function.
    • Example :  gpio.mode(1, gpio.OUTPUT)
  • Turn LED ON
    • Set LED pin (gpio-5) HIGH using gpio.write(pin, level)  function.
    • Example : gpio.write(1, gpio.HIGH)  or gpio.write(1, 1)
  • Turn LED  OFF
    • Set LED pin (gpio-5) Low using gpio.write(pin, level)  function.
    • Example : gpio.write(1, gpio.LOW) or gpio.write(1,0)

 


LED Blink Using Timer

  • Required NodeMCU Modules (Firmware) GPIO Module, Timer Module
  • Required Hardware ESP8266 with Programmer (or)  NodeMCU Dev Kit, LED- 3v3 or 5v,
  • Required Software Tools ESPlorer IDE Tool

ESP8266 with LED Connection Diagram

  • Will Add Soon

NodeMCU Lua code

Follow steps

  • Connect the circuit as per the connection diagram
  • Save the above code as “AEW_LED-Blink.lua”
  • Open ESPlorer and upload the file “AEW_LED-Blink.lua”
  • Run the file  [ dofile(“AEW_LED-Blink.lua”) ]
  • Done.!(LED will Blink based on blink time)

LED Blink uisng While loop and Timer delay function

  • Use

     

LED Fade using PWM

  • Use this code

     

 

 


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