MicroPython Tutorial: 
Lighting LED with UDP 


What is uPyCraft?

uPyCraft is an IDE runs on Windows and Mac, designed with simple interface and it is convenient to use.
To provide an easy and practical platform for fans of MicroPython, uPyCraft has many internal libraries.  


The Primer posters:

A brief Introduction of interface


Lighting LED with UDP (A Step by Step Study of Micro-Python)

Hardware list

Hardware list

FireBeetle ESP32 IOT Microcontroller (Supports Wi-Fi & Bluetooth) X1

FireBeetle Covers-Gravity I/O Expansion Shield X1

Ssd1306 oled Display (I2C interface) X1

LED X1

DuPont wires X6

Software list

Step1: Connecting FireBeetle Board-ESP32 to PC to prepare for uploading.





If the application is new or took from examples, you should choose download and run in the menu of tools after editing; but if it is already in your PC, you can just run it.


Step2: Code for FireBeetle Board-ESP32

import socket
import network
import time
from machine import Pin,I2C
import ssd1306
 
i2c = I2C(scl=Pin(22), sda=Pin(21), freq=100000)  
lcd=ssd1306.SSD1306_I2C(128,64,i2c)
led = Pin(27,Pin.OUT)    # configura gpio27──to D4
led.value(0) # Initialize to turn off the LED light.
 
port = 10000 #Interface 10000
SSID="*************" #yourssid
PASSWORD="****************" #your psw
wlan=None
s=None
 
def connectWifi(ssid,passwd): #Configure Wi-Fi
  global wlan
  wlan=network.WLAN(network.STA_IF)
  wlan.active(True)
  wlan.disconnect()
  wlan.connect(ssid,passwd)
 
  while(wlan.ifconfig()[0]=='0.0.0.0'):
    time.sleep(1)
  return True
 
try:
  if(connectWifi(SSID, PASSWORD) == True): #Sucessful connection
    s=socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
    s.setsockopt(socket.SOL_SOCKET,socket.SO_REUSEADDR,1)  
    ip=wlan.ifconfig()[0]
    s.bind((ip,port))
    print('waiting...')
    lcd.text("Connected...",0,0) #Display Connected in oled screen...
    while True:
      data,addr=s.recvfrom(1024)
      print('received:',data,'from',addr)
      lcd.clear()
      lcd.text("Received:",0,16) # Display text received in oled screen
      lcd.text(data,24,32)
      lcd.show()
      s.sendto(data+"***",addr) # Send to client side of udp, adding ‘***’
      if int(data)==1: #Character is 1
        led.value(1)    #Turn on LED light
      else:#Not 1
        led.value(0) #Turn off the LED light.
except:
  if (s):
    s.close()
  wlan.disconnect()
  wlan.active(False)

Step3: Connect hardware and allocate with UDP client side.

Connection list