Script in microPython for NodeMCU ESP8266 board - blinks in response to binary code

microPython blink-wifi main.py

import socket
import machine
import time

BLINK_ON = 0.25

red_led = machine.Pin(16, machine.Pin.OUT) 
blue_led = machine.Pin(2, machine.Pin.OUT) # 16 red, 2 blue
red_led.on() # turn off
blue_led.on() # turn off

UDP_IP = "192.168.1.81"
UDP_PORT = 2390

sock = socket.socket(socket.AF_INET, # Internet
                     socket.SOCK_DGRAM) # UDP
sock.bind((UDP_IP, UDP_PORT))

def delay(led):
    led.on() # LED off
    time.sleep(4 * BLINK_ON) # LED off - pausing here

def blink_led(led, value):
    if value <= 15: # validate input
        for i in range(value):
            led.off()  # LED on
            time.sleep(BLINK_ON)
            led.on() # LED off
            time.sleep(BLINK_ON)
            
        delay(led)

while True:
    data, addr = sock.recvfrom(64) # buffer size is 64 bytes
    print("received raw message:", data)
    blinks = int(data)
    if (blinks & 2) and blinks <= 15:
        blink_led(red_led, 2)
        blink_led(blue_led, blinks - 2)
    else:
        blink_led(blue_led, blinks)