garage_reporter_with_soracom_unified.py

"""
[Unit]
Description=Garage reporter using HTTP with SORACOM Unified Endpoint
After=network-online.target

[Service]
Type=simple
WorkingDirectory=/home/pi/switchbot
ExecStart=/home/pi/switchbot/bin/python3 -B garage_reporter_with_soracom_unified.py
ExecStop=/bin/kill -INT ${MAINPID}
Restart=always
RestartSec=5s
StartLimitBurst=10

[Install]
WantedBy=default.target
"""

import time
import json
import urllib.request
import VL53L0X

THING_NAME = "GarageSwitchBot1"
HEADER = {'Content-Type': 'application/json'}
URL = "http://unified.soracom.io"
THRESHOLD = 0.95

def main():
    tof = VL53L0X.VL53L0X(i2c_bus=1, i2c_address=0x29)
    tof.open()
    tof.start_ranging()

    prev = 0
    while True:
        dists = list(map(lambda _: tof.get_distance(), range(5))) # measurement 5 times
        #print(dists, flush=True)
        curr = max(dists)
        a = [curr, prev]
        prev = curr
        if (1 - (min(a) / max(a))) > THRESHOLD:
            v = {"thing_name": THING_NAME, "distance_mm": curr}
            payload = json.dumps(v, ensure_ascii=False).encode('UTF-8')
            print(payload, flush=True)
            req = urllib.request.Request(URL, payload, HEADER)
            with urllib.request.urlopen(req) as res:
                _ = res.read()
        #else:
            #print("skip", flush=True)

        time.sleep(3)

if __name__ == '__main__':
    main()