ESP32-MicroPythonCodingExamples1

MicroPython Coding Examples V1

Some early / easy examples

Copy and paste to a new Mu Editor page

ESP32 Starter Template

You can use this to start a new MicroPython program. Change the IMPORTS as needed, and get rid of the Blink example.

# ESP32INFO.INFO Starter Examples
# See: http://Esp32Info.Info
# hardware platform: ESP32 DevKit
# Result:
# - CONNECTIONS:
# -
# -
# - V1.00 01/26/2022
# Questions: terry@yourduino.com */

# /*-----( Import needed libraries )-----*/

from machine import Pin
from time import sleep

# /*-----( Declare Variables )-----*/


# /*-----( Declare Variables that define hardware )-----*/

led = Pin(23, Pin.OUT)  # create LED object from pin32,Set Pin32 to output


while True:  # (FOREVER here )

    led.on  # turn LED on
    sleep(0.5)  # 1/2 second
    led.off  # turn LED off
    sleep(0.5)

 

BLINK Easy

# hardware platform: ESP-32
# Result: Blinking LED
# Questions? terry@yourduino.com

from time import sleep  # Import needed libraries
from machine import Pin

led = Pin(23, Pin.OUT)  # create LED object from pin23,Set Pin23 to output

while True:
    led.on  # turn LED on
    sleep(0.5)
    led.off  # turn LED off
    sleep(0.5)

BLINK Morse Code "HI"

# hardware platform: ESP32 DevKit
# Result: Blink Morse code "HI"
# The information below shows blink can not use these pins:
# IO0 IO4 IO10 IO12~19 IO21~23 IO25~27

# /*-----( Import needed libraries )-----*/
from time import sleep
from machine import Pin

# /*-----( Declare Variables )-----*/
# /*-----( Declare Variables that define hardware )-----*/
led = Pin(23, Pin.OUT)  # create LED object from pin23,Set Pin23 to output
n = 0
while True:  # Sort of like LOOP in Arduino

    i = 1
    while i <= 4:
        led.value(1)  # Set led turn on
        sleep(0.1)
        led.value(0)  # Set led turn off
        sleep(0.2)
        i = i + 1  # update counter
    sleep(0.2)

    i = 1
    while i <= 2:
        led.value(1)  # Set led turn on
        sleep(0.1)
        led.value(0)  # Set led turn off
        sleep(0.2)
        i = i + 1  # update counter
    n = n + 1
    print("N =", n)
    sleep(1.0)

PWM_Pin23_Test2

# ESP32INFO.INFO Starter Examples
# See: http://Esp32Info.Info
# hardware platform: ESP32 DevKit
# Result:
# - CONNECTIONS:
# - Pin 32 to LED and Resistor (220 ohms good)
# -
# - V1.00 01/26/2022
# Questions: terry@yourduino.com */

# /*-----( Import needed libraries )-----*/
from machine import Pin, PWM
from time import sleep

# /*-----( Declare Variables )-----*/
frequency = 5000

# /*-----( Declare Variables that define hardware )-----*/
led = PWM(Pin(23), frequency)


while True:  # (FOREVER)
    duty_cycle = 0
    while duty_cycle <= 1022:
        led.duty(duty_cycle)
        duty_cycle += 1
        sleep(0.005)
    while duty_cycle >= 0:
        led.duty(duty_cycle)
        duty_cycle -= 1
        sleep(0.005)
    sleep(2.0)