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November 26, 2022 05:31
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MicroPython - RPi Pico W 비동기 서버로 LED 제어하기
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| from network import WLAN, STA_IF | |
| from time import sleep | |
| import socket | |
| from machine import Pin | |
| import uasyncio as asyncio | |
| SSID = 'devicemart' | |
| PASSWORD = 'devicemart1' | |
| HTML = '''<!DOCTYPE html> | |
| <html> | |
| <head> | |
| <title>Pico W</title> | |
| </head> | |
| <body> | |
| <h1>Pico W</h1> | |
| <p>%s</p> | |
| </body> | |
| </html> | |
| ''' | |
| led = Pin(18, Pin.OUT) | |
| led.value(0) | |
| led_heartbeat = Pin(19, Pin.OUT) | |
| led_heartbeat.value(0) | |
| wlan = WLAN(STA_IF) | |
| async def serve_client(reader, writer): | |
| print('Client connected') | |
| request_line = await reader.readline() | |
| print('Request:', request_line) | |
| while await reader.readline() != b'\r\n': | |
| pass | |
| request = str(request_line) | |
| led_on = request.find('/led/on') | |
| led_off = request.find('/led/off') | |
| print('index of /led/on = ' + str(led_on)) | |
| print('index of /led/off = ' + str(led_off)) | |
| if led_on == 6: | |
| print('led on!') | |
| led.value(1) | |
| state = 'LED is ON!' | |
| if led_off == 6: | |
| print('led off!') | |
| led.value(0) | |
| state = 'LED is OFF!' | |
| response = HTML % state | |
| writer.write('HTTP/1.0 200 OK\r\nContent-Type: text/html\r\n\r\n') | |
| writer.write(response) | |
| await writer.drain() | |
| await writer.wait_closed() | |
| print('Client disconnected') | |
| async def main(): | |
| print('Connecting to Network...') | |
| wlan.active(True) | |
| wlan.connect(SSID, PASSWORD) | |
| max_wait = 10 | |
| while max_wait > 0: | |
| if wlan.status() < 0 or wlan.status() >= 3: | |
| break | |
| max_wait -= 1 | |
| print('waiting for connection...') | |
| sleep(1) | |
| if wlan.status() != 3: | |
| raise RuntimeError('network connection failed') | |
| else: # wlan.status() == 3 | |
| print('connected') | |
| status = wlan.ifconfig() | |
| print('ip = ' + status[0]) | |
| print('Setting up webserver...') | |
| asyncio.create_task(asyncio.start_server(serve_client, '0.0.0.0', 80)) | |
| while True: | |
| led_heartbeat.value(1) | |
| print('heartbeat') | |
| await asyncio.sleep(0.25) | |
| led_heartbeat.value(0) | |
| await asyncio.sleep(5) | |
| try: | |
| asyncio.run(main()) | |
| finally: | |
| asyncio.new_event_loop() | |
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