79 lines
1.8 KiB
Python
79 lines
1.8 KiB
Python
import time
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import board
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import adafruit_dht
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import json
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from datetime import datetime
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import os
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dhtDevice = adafruit_dht.DHT11(board.D23)
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json_file = "json/ky015_data.json"
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datatemphum = {
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"id": "sensor_002/3",
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"type": "environment",
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"unit": {
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"temperature": "°C",
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"humidity": "%"
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},
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"reading": []
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}
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def load_data():
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if os.path.exists(json_file):
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with open(json_file, 'r', encoding='utf-8') as f:
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return json.load(f)
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else:
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return datatemphum.copy()
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def save_data(data):
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with open(json_file, 'w', encoding='utf-8') as f:
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json.dump(data, f, indent=4, ensure_ascii=False)
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max_entries=3000
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def capture_and_store(temperature_c,humidity):
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timestamp = int(time.time())
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data = load_data()
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data["reading"].append({
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"ts": timestamp,
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"temperature": temperature_c,
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"humidity":humidity
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})
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if len(data["reading"]) > max_entries:
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data["reading"] = data["reading"][-max_entries:]
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save_data(data)
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while True:
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try:
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temperature_c = dhtDevice.temperature
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humidity = dhtDevice.humidity
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timestamp = datetime.now().isoformat()
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if temperature_c is not None and humidity is not None:
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capture_and_store(temperature_c, humidity)
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else:
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print("Ungültige Messwerte.")
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except RuntimeError as error:
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print("Lese-Fehler:", error.args[0])
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dhtDevice.exit()
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time.sleep(3.0)
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dhtDevice=adafruit_dht.DHT11(board.D23)
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continue
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except KeyboardInterrupt:
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dhtDevice.exit()
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print("Beendet durch Benutzer.")
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break
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except Exception as error:
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dhtDevice.exit()
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raise error
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time.sleep(3.0)
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