Raspberry Pi 環境監測系統

gistfile1.txt · 234 B · Text Brut

1	CREATE DATABASE environment;
2
3	USE environment;
4
5	CREATE TABLE environment_data (
6	id INT AUTO_INCREMENT PRIMARY KEY,
7	humidity FLOAT NOT NULL,
8	temperature FLOAT NOT NULL,
9	recorded_at DATETIME DEFAULT CURRENT_TIMESTAMP
10	);
11

gistfile2.txt · 193 B · Text Brut

1	[program:sensor_monitor]
2	command=/usr/bin/python3 /path/to/sensor_monitor.py
3	directory=/path/to/
4	autostart=true
5	autorestart=true
6	redirect_stderr=true
7	stdout_logfile=/path/to/sensor_monitor.log
8

sensor_monitor.py · 2.7 KiB · Python Brut

import Adafruit_DHT import schedule import time from gpiozero import LED import pymysql.cursors from datetime import datetime import os import logging # 日誌設定 logging.basicConfig(level=logging.INFO, filename='sensor.log', format='%(asctime)s - %(levelname)s - %(message)s') # 資料庫設定 DB_HOST = os.getenv('DB_HOST', '127.0.0.1') # 預設為本地端 DB_USER = os.getenv('DB_USER', 'db_user') # 資料庫使用者名稱 DB_PASSWORD = os.getenv('DB_PASSWORD', 'db_password') # 資料庫密碼 DB_NAME = os.getenv('DB_NAME', 'environment') # 資料庫名稱 # LED 腳位設定 green_led = LED(17) # 綠燈 yellow_led = LED(27) # 黃燈 red_led = LED(22) # 紅燈 # DHT11 感測器設定 sensor = Adafruit_DHT.DHT11 # 感測器型號 pin = 4 # 感測器連接的 GPIO 腳位 # LED 控制函數 def control_leds(temp): green_led.on() if temp < 25.0 else green_led.off() yellow_led.on() if 25.0 <= temp < 30.0 else yellow_led.off() red_led.on() if temp >= 30.0 else red_led.off() # 定時執行的核心任務 def job(): try: # 讀取感測器數據 humidity, temperature = Adafruit_DHT.read_retry(sensor, pin) now = datetime.now().strftime("%Y-%m-%d %H:%M:%S") if humidity is not None and temperature is not None: logging.info(f"{now} - Temp: {temperature:.1f}°C, Humidity: {humidity:.1f}%") # 儲存數據到資料庫 try: connection = pymysql.connect( host=DB_HOST, user=DB_USER, password=DB_PASSWORD, db=DB_NAME, charset='utf8mb4', cursorclass=pymysql.cursors.DictCursor ) with connection.cursor() as cursor: sql = "INSERT INTO environment_data (humidity, temperature) VALUES (%s, %s)" cursor.execute(sql, (humidity, temperature)) connection.commit() except Exception as db_err: logging.error(f"資料庫連線錯誤: {db_err}") finally: if 'connection' in locals(): connection.close() # 控制 LED control_leds(temperature) else: logging.warning("感測器讀取失敗，無法取得數據") except Exception as e: logging.error(f"執行任務時發生錯誤: {e}") # 排程設定，每 5 分鐘執行一次 schedule.every(300).seconds.do(job) try: while True: schedule.run_pending() time.sleep(1) except KeyboardInterrupt: logging.info("程式已被使用者中斷") green_led.off() yellow_led.off() red_led.off()

1	import Adafruit_DHT
2	import schedule
3	import time
4	from gpiozero import LED
5	import pymysql.cursors
6	from datetime import datetime
7	import os
8	import logging
9
10	# 日誌設定
11	logging.basicConfig(level=logging.INFO, filename='sensor.log',
12	format='%(asctime)s - %(levelname)s - %(message)s')
13
14	# 資料庫設定
15	DB_HOST = os.getenv('DB_HOST', '127.0.0.1') # 預設為本地端
16	DB_USER = os.getenv('DB_USER', 'db_user') # 資料庫使用者名稱
17	DB_PASSWORD = os.getenv('DB_PASSWORD', 'db_password') # 資料庫密碼
18	DB_NAME = os.getenv('DB_NAME', 'environment') # 資料庫名稱
19
20	# LED 腳位設定
21	green_led = LED(17) # 綠燈
22	yellow_led = LED(27) # 黃燈
23	red_led = LED(22) # 紅燈
24
25	# DHT11 感測器設定
26	sensor = Adafruit_DHT.DHT11 # 感測器型號
27	pin = 4 # 感測器連接的 GPIO 腳位
28
29
30	# LED 控制函數
31	def control_leds(temp):
32	green_led.on() if temp < 25.0 else green_led.off()
33	yellow_led.on() if 25.0 <= temp < 30.0 else yellow_led.off()
34	red_led.on() if temp >= 30.0 else red_led.off()
35
36
37	# 定時執行的核心任務
38	def job():
39	try:
40	# 讀取感測器數據
41	humidity, temperature = Adafruit_DHT.read_retry(sensor, pin)
42	now = datetime.now().strftime("%Y-%m-%d %H:%M:%S")
43
44	if humidity is not None and temperature is not None:
45	logging.info(f"{now} - Temp: {temperature:.1f}°C, Humidity: {humidity:.1f}%")
46
47	# 儲存數據到資料庫
48	try:
49	connection = pymysql.connect(
50	host=DB_HOST,
51	user=DB_USER,
52	password=DB_PASSWORD,
53	db=DB_NAME,
54	charset='utf8mb4',
55	cursorclass=pymysql.cursors.DictCursor
56	)
57
58	with connection.cursor() as cursor:
59	sql = "INSERT INTO environment_data (humidity, temperature) VALUES (%s, %s)"
60	cursor.execute(sql, (humidity, temperature))
61	connection.commit()
62
63	except Exception as db_err:
64	logging.error(f"資料庫連線錯誤: {db_err}")
65	finally:
66	if 'connection' in locals():
67	connection.close()
68
69	# 控制 LED
70	control_leds(temperature)
71	else:
72	logging.warning("感測器讀取失敗，無法取得數據")
73
74	except Exception as e:
75	logging.error(f"執行任務時發生錯誤: {e}")
76
77
78	# 排程設定，每 5 分鐘執行一次
79	schedule.every(300).seconds.do(job)
80
81	try:
82	while True:
83	schedule.run_pending()
84	time.sleep(1)
85	except KeyboardInterrupt:
86	logging.info("程式已被使用者中斷")
87	green_led.off()
88	yellow_led.off()
89	red_led.off()
90