from machine import Pin
import time
 
led = Pin(12, Pin.OUT)# Build an LED object, connect the external LED light to pin 0, and set pin 0 to output mode
while True:
    led.value(1)# turn on led
    time.sleep(1)# delay 1s
    led.value(0)# turn off led
    time.sleep(1)# delay 1s

import time
from machine import Pin,PWM
 
#The way that the ESP32 PWM pins output is different from traditionally controllers.
#It can change frequency and duty cycle by configuring PWM’s parameters at the initialization stage.
#Define GPIO 0’s output frequency as 10000Hz and its duty cycle as 0, and assign them to PWM.
p0 = Pin(012, Pin.OUT)
pwm = PWM(p0, freq=10000, duty_u16=8192)
 
 
try:
    while True: 
#The range of duty cycle is 0-1023, so we use the first for loop to control PWM to change the duty
#cycle value,making PWM output 0% -100%; Use the second for loop to make PWM output 100%-0%.  
        for i in range(0,1023):
            pwm.duty(i)
            time.sleep_ms(1)
 
        for i in range(0,1023):
            pwm.duty(1023-i)
            time.sleep_ms(1)  
except:
#Each time PWM is used, the hardware Timer will be turned ON to cooperate it. Therefore, after each use of PWM,
#deinit() needs to be called to turned OFF the timer. Otherwise, the PWM may fail to work next time.
    pwm.deinit()

from machine import Pin
import time
 
button1 = Pin(16, Pin.IN, Pin.PULL_UP)
button2 = Pin(27, Pin.IN, Pin.PULL_UP)
 
while True:
    btnVal1 = button1.value()  # Reads the value of button 1
    btnVal2 = button2.value()
    print("button1 =",btnVal1)  #Print it out in the shell
    print("button2 =",btnVal2)
    time.sleep(0.1) #delay 0.1s

from machine import Pin
import time
 
button1 = Pin(16, Pin.IN, Pin.PULL_UP)
led = Pin(12, Pin.OUT)
count = 0
 
while True:
    btnVal1 = button1.value()  # Reads the value of button 1
    #print("button1 =",btnVal1)  #Print it out in the shell
    if(btnVal1 == 0):
        time.sleep(0.01)
        while(btnVal1 == 0):
            btnVal1 = button1.value()
            if(btnVal1 == 1):
                count = count + 1
                print(count)
    val = count % 2
    if(val == 1):
        led.value(1)
    else:
        led.value(0)
    time.sleep(0.1) #delay 0.1s