54 lines
1.2 KiB
Python
54 lines
1.2 KiB
Python
import time
|
|
import json
|
|
import os
|
|
import board
|
|
import digitalio
|
|
|
|
json_file = "ky018_data.json"
|
|
MAX_ENTRIES = 3000
|
|
|
|
light_pin = digitalio.DigitalInOut(board.D17)
|
|
light_pin.direction = digitalio.Direction.INPUT
|
|
|
|
data_template = {
|
|
"id": "sensor_004",
|
|
"type": "light",
|
|
"unit": "bool",
|
|
"reading": []
|
|
}
|
|
|
|
def load_data():
|
|
if os.path.exists(json_file):
|
|
with open(json_file, 'r', encoding='utf-8') as f:
|
|
return json.load(f)
|
|
else:
|
|
return data_template.copy()
|
|
|
|
def save_data(data):
|
|
with open(json_file, 'w', encoding='utf-8') as f:
|
|
json.dump(data, f, indent=4, ensure_ascii=False)
|
|
|
|
def capture_and_store(state):
|
|
timestamp = int(time.time())
|
|
data = load_data()
|
|
|
|
data["reading"].append({"ts": timestamp,"value": state})
|
|
|
|
if len(data["reading"]) > MAX_ENTRIES:
|
|
data["reading"] = data["reading"][-MAX_ENTRIES:]
|
|
|
|
save_data(data)
|
|
|
|
try:
|
|
while True:
|
|
if light_pin.value:
|
|
light_state = True
|
|
else:
|
|
light_state = False
|
|
|
|
print(f"Lichtzustand: {light_state}")
|
|
capture_and_store(light_state)
|
|
time.sleep(2)
|
|
|
|
except KeyboardInterrupt:
|
|
print("Programm beendet.")
|