homecontrol-dht/main.py

import dht
import machine
import utime as time
import urequests as requests
import uuid
import ujson
import wifi

CONFIG = "config.json"
ADDRESS="http://192.168.11.11:5000"
TIMEOUT_UPDATE = 600

class SensorDHT:
    def __init__(self):
        self.config = {}
        try:
            config_file = open(CONFIG, "r")
            self.config = ujson.load(config_file)
        except Exception as ex:
            print("Exception\n\ttype: %s\n\targs: %s" % (type(ex).__name__, ex.args))

        update_config = False
        if not self.config.get("id_t"):
            update_config = True
            self.config["id_t"] = uuid.uuid4().hex
        if not self.config.get("id_h"):
            update_config = True
            self.config["id_h"] = uuid.uuid4().hex
        if update_config:
            with open(CONFIG, "w") as config_file:
                ujson.dump(self.config, config_file)
        self.id_t = self.config["id_t"]
        self.id_h = self.config["id_h"]

        self.d = dht.DHT22(machine.Pin(2))

    def update(self):
        self.d.measure()
        t = float(self.d.temperature())
        h = float(self.d.humidity())
        print("T: %f, H: %f" % (t, h))
        self.send_update(self.id_t, "temperature", t)
        self.send_update(self.id_h, "humidity", h)

    def send_update(self, id_s, type_s, value):
        url = "%s/sensor/update" % ADDRESS
        data = {"id": id_s, "type": type_s, "value": value}
        try:
            r = requests.post(url, json=data)
            # remember to close
            r.close()
        except Exception as ex:
            print("Exception\n\tdata: %s\n\ttype: %s\n\targs: %s" % (data, type(ex).__name__, ex.args))

if __name__ == "__main__":
    w = wifi.wifi()
    w.connect()
    sensor = SensorDHT()

    while True:
        sensor.update()
        time.sleep(TIMEOUT_UPDATE)