def start(self):
"""Getting the bus"""
if self.bus is None:
raise KeyError("Bus missing for BME280Sensor")
# Initialize the hardware driver.
try:
self.driver = BME280(address=self.address, i2c=self.bus.adapter)
return True
except Exception as ex:
log.exc(ex, 'BME280 hardware driver failed')
def start(self):
"""
Setup the BME280 sensor driver.
:return:
"""
# Ensure a bus object exists and is ready.
self.ensure_bus()
# Initialize the hardware driver.
try:
# MicroPython
if platform_info.vendor in [platform_info.MICROPYTHON.Vanilla, platform_info.MICROPYTHON.Pycom]:
from bme280_float import BME280
self.driver = BME280(address=self.address, i2c=self.bus.adapter)
# Adafruit CircuitPython
elif platform_info.vendor == platform_info.MICROPYTHON.RaspberryPi:
import adafruit_bme280
self.driver = adafruit_bme280.Adafruit_BME280_I2C(i2c=self.bus.adapter, address=self.address)
# RPi.bme280
elif platform_info.vendor == platform_info.MICROPYTHON.Odroid:
import bme280
self.calibration_params = bme280.load_calibration_params(self.bus.adapter, self.address)
self.driver = bme280.sample(self.bus.adapter, self.address)
else:
raise NotImplementedError('BME280 driver not implemented on this platform')
return True
except Exception as ex:
log.exc(ex, 'BME280 hardware driver failed')
return False
while True:
try:
volt = measure_battery_level()
# After leaving deepsleep it may be necessary to un-hold the pin explicitly (e.g. if it is an output pin)
# See https://docs.micropython.org/en/latest/esp32/quickref.html#deep-sleep-mode
p1 = machine.Pin(4, machine.Pin.OUT, None)
# enable power for temperatuer sensor
p2 = machine.Pin(19, machine.Pin.OUT)
p2.value(1)
values = decode_memory()
i2c = setup_i2c()
bme = BME280(i2c=i2c)
print(bme.values)
# disable power for temperatuer sensor
#p2.value(0)
cleaned_values = (bme.values[0].replace("C", ""),
bme.values[1].replace("hPa", ""),
bme.values[2].replace("%", ""))
values.append(cleaned_values)
print("calc mean")
value = calc_mean(values)
print(len(values))
if len(values) == SENDING_BATCH:
print("send batch")
send_batch(value, volt)
# template for MQTT client
import ubinascii
from machine import unique_id, I2C, Pin
import time
from utime import ticks_ms
from umqttsimple import MQTTClient
from bme280_float import BME280, BME280_OSAMPLE_8
# BME280 - SPIs
# D1 - 05 - SCL
# D2 - 04 - SDA
# init sensor
i2c = I2C(scl=Pin(5), sda=Pin(4))
bme280 = BME280(i2c=i2c, mode=BME280_OSAMPLE_8)
def read_data(bme280):
data = bme280.read_compensated_data()
dew = bme280.dew_point
print("{:6.2}°C {:10}hPa {:5.2}% {:6.2}°C(dew)".format(
data[0], data[1], data[2], dew))
return data[0], data[1], data[2], dew
# MQTT configuration
MQTT_SERVER = '192.168.42.1' #where your mosquitto server is running
CLIENT_ID = ubinascii.hexlify(unique_id()).decode("utf-8")
# callback to handle subscritions