101 lines
3.4 KiB
Python
101 lines
3.4 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 esp
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import bme280_i2c
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from ntptime import settime
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from umqtt.robust 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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def MqttPublish(client, topic, message, retain=False, qos=0, sleep=10):
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"""MQTT publish helper"""
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client.publish("test/{device}/{topic}".format(device=config.CLIENT_ID, topic=topic),
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message,
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retain=retain,
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qos=qos)
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time.sleep_ms(sleep)
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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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MqttPublish(client, "location", config.LOCATION, retain=True, qos=1)
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MqttPublish(client, "humidity/unit", "%", retain=True)
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MqttPublish(client, "humidity/desc", "Capteur Bosch BME280", retain=True, qos=0)
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MqttPublish(client, "pressure/unit", "hPa", retain=True, qos=0)
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MqttPublish(client, "pressure/desc", "Capteur Bosch BME280", retain=True, qos=0)
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MqttPublish(client, "temperature/unit", "degC", retain=True, qos=0)
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MqttPublish(client, "temperature/desc", "Capteur Bosch BME280", retain=True, qos=0)
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MqttPublish(client, "wifi/ssid", config.WIFI_SSID, retain=True, qos=0)
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MqttPublish(client, "wifi/ip", wlan.ifconfig()[0], retain=True, qos=0)
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MqttPublish(client, "wifi/channel", "{:d}".format(net[2]), retain=True, qos=0)
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MqttPublish(client, "sys/esp8266_device_id", "{:d}".format(esp.flash_id()), retain=True, qos=0)
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time.sleep_ms(1000)
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# For each nature, a list describes:
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# - mqtt topic
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# - string format
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# - factor (multiplier)
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# - qos
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topics = {"humidity" : ["humidity/value", "{:.0f}", 1, 1],
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"pressure" : ["pressure/value", "{:.2f}", 0.01, 1],
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"temperature" : ["temperature/value", "{:.1f}", 1, 1]}
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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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for nature, param in topics.items():
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MqttPublish(client,
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param[0],
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param[1].format(bme_data[nature]*param[2]),
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qos=param[3],
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sleep=50)
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MqttPublish(client, "wifi/rssi", "{:.0f}".format(wlan.status('rssi')))
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time.sleep_ms(1000)
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