71 lines
2.3 KiB
Python
71 lines
2.3 KiB
Python
"""Station météo connectée au service Adafruit IO
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"""
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import time
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import machine
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import network
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import bme280_i2c
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from mqtt import MQTTClient
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import config
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# connect to WLAN
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wlan = network.WLAN(network.STA_IF)
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wlan.active(True)
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nets = wlan.scan()
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for net in nets:
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net_ssid = net[0].decode()
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if net_ssid == config.WIFI_SSID:
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print('Network found!')
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wlan.connect(net_ssid, config.WIFI_PSK)
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while not wlan.isconnected():
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machine.idle() # save power while waiting
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print('WLAN connection succeeded!')
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break
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if not wlan.isconnected():
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print("WLAN not found/not connected")
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# Create a micropython I2C object with the appropriate device pins
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i2c = machine.I2C(scl=machine.Pin(5), sda=machine.Pin(4))
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# Create a sensor object to represent the BME280
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# Note that this will error if the device can't be reached over I2C.
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bme = bme280_i2c.BME280_I2C(address=bme280_i2c.BME280_I2C_ADDR_SEC, i2c=i2c)
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# Configure the sensor for the application in question.
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bme.set_measurement_settings({
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'filter': bme280_i2c.BME280_FILTER_COEFF_16,
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'standby_time': bme280_i2c.BME280_STANDBY_TIME_500_US,
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'osr_h': bme280_i2c.BME280_OVERSAMPLING_1X,
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'osr_p': bme280_i2c.BME280_OVERSAMPLING_16X,
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'osr_t': bme280_i2c.BME280_OVERSAMPLING_2X})
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# Start the sensor automatically sensing
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bme.set_power_mode(bme280_i2c.BME280_NORMAL_MODE)
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client = MQTTClient(client_id=config.CLIENT_ID,
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server=config.MQTT_HOST,
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user=config.MQTT_USERNAME,
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password=config.MQTT_PASSWD,
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port=config.MQTT_PORT)
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client.connect()
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client.publish("test/bme280/humidity/unit", "%", retain=True, qos=0)
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time.sleep_ms(100)
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client.publish("test/bme280/pressure/unit", "hPa", retain=True, qos=0)
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time.sleep_ms(100)
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client.publish("test/bme280/temperature/unit", "oC", retain=True, qos=0)
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time.sleep_ms(1000)
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while 1:
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bme_data = bme.get_measurement()
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print(bme_data)
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client.publish("test/bme280/humidity/value",
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"{:.0f}".format(bme_data["humidity"]))
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client.publish("test/bme280/pressure/value",
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"{:.2f}".format(bme_data["pressure"]/100))
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client.publish("test/bme280/temperature/value",
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"{:.1f}".format(bme_data["temperature"]))
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time.sleep_ms(1000)
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