Wiznet makers

Implementation

🔌 Hardware Setup

• No additional wiring is required. We use the onboard LED.
• Connect W55RP20-EVB-Pico to your router via Ethernet.

🛠️ Software Prerequisites

• Thonny
• How to build WIZnet-ioNIC-micropython
• WIZnet Ethernet library
• MQTT client library (umqttsimple.py)

☁️ Beebotte Configuration

1. Sign up at https://beebotte.com
2. Create a channel (e.g., W55RP20EVBPico)
3. Add a resource (e.g., led) of type boolean
4. Save your Channel Token and Channel Name
5. Create a Dashboard
6. Add On/Off Widget to Control the LED

🧠 Code Logic

import network
import time
import ujson
import urandom
from machine import Pin, WIZNET_PIO_SPI
from umqtt.simple import MQTTClient

# 핀 설정
LEDPIN = Pin(19, Pin.OUT)

# Beebotte MQTT 설정
BBT = "mqtt.beebotte.com"
TOKEN = "token_"
CHANNEL = "W55RP20EVBPico"
LED_RESOURCE = "led"

# MQTT 클라이언트 생성
client = None

#W5x00 chip init
def w5x00_init():
    spi = WIZNET_PIO_SPI(baudrate=31_250_000, mosi=Pin(23),miso=Pin(22),sck=Pin(21)) #W55RP20 PIO_SPI
    nic = network.WIZNET5K(spi,Pin(20),Pin(25)) #spi,cs,reset pin
    nic.active(True)
    
#None DHCP
    nic.ifconfig(('192.168.11.20','255.255.255.0','192.168.11.1','8.8.8.8'))
    
    #DHCP
    #nic.ifconfig('dhcp')
    
    print('IP address :', nic.ifconfig())
    while not nic.isconnected():
        time.sleep(1)
        print(nic.regs())
    

def generate_id(length=16):
    """랜덤 ID 생성"""
    chars = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ1234567890"
    return ''.join(chars[urandom.getrandbits(6) % len(chars)] for _ in range(length))


def sub_callback(topic, msg):
    """MQTT 메시지 수신 콜백"""
    print("Received:", topic, msg)
    try:
        data = ujson.loads(msg)
        led_state = data.get("data", 0)

        if led_state:
            LEDPIN.on()
        else:
            LEDPIN.off()
        print(f"LED 상태 변경: {'ON' if led_state else 'OFF'}")
    except Exception as e:
        print("JSON Parsing Error:", e)


def mqtt_connect():
    """MQTT 서버에 연결"""
    global client
    client = MQTTClient(generate_id(), BBT, 1883, TOKEN, "")
    client.set_callback(sub_callback)
    
    try:
        client.connect()
        topic = f"{CHANNEL}/{LED_RESOURCE}"
        client.subscribe(topic)
        print(f"Connected to Beebotte MQTT, subscribed to {topic}")
        return True
    except Exception as e:
        print("MQTT 연결 실패:", e)
        return False


def main():
    """메인 실행 함수"""
    global client

    # 이더넷 초기화
    w5x00_init()

    # MQTT 연결 시도
    while not mqtt_connect():
        print("MQTT 재연결 중...")
        time.sleep(5)

    last_reconnect_attempt = time.time()

    while True:
        try:
            client.check_msg()  # 새로운 메시지 확인
        except Exception as e:
            print("MQTT 오류:", e)

            # 재연결 로직
            if time.time() - last_reconnect_attempt > 5:
                print("MQTT 재연결 시도 중...")
                last_reconnect_attempt = time.time()
                if mqtt_connect():
                    last_reconnect_attempt = 0

        time.sleep(1)


if __name__ == "__main__":
    main()