def __init__(self,
ccs811_address=0x5b,
bme280_address=0x77,
tmp117_address=0x48,
ccs811_n_samples=1):
self.lock = _thread.allocate_lock()
self.ccs811_n_samples = ccs811_n_samples
self.ccs811 = qwiic_ccs811.QwiicCcs811(address=ccs811_address)
self.bme280 = qwiic_bme280.QwiicBme280(address=bme280_address)
self.tmp117 = qwiic_tmp117.QwiicTmp117(address=tmp117_address)
self.ccs811.begin()
self.bme280.begin()
self.tmp117.begin()
# The conversion and averaging affect who long we will have to wait
# for a conversion. See the TMP117 data sheet.
self.tmp117.set_avg(qwiic_tmp117.QwiicTmp117.CONV_AVG_8)
self.tmp117.set_cycle(qwiic_tmp117.QwiicTmp117.CONV_CYCLE_2)
self.tvoc_q = []
self.eco2_q = []
self.pres_q = []
self.tdry_q = []
self.rh_q = []
_thread.start_new_thread(self.read_loop, (None, ))
# Sleep so that the measure thread can start
time.sleep(1)
def runExample():
print("\nSparkFun BME280 Sensor Example 4\n")
mySensor = qwiic_bme280.QwiicBme280()
if mySensor.isConnected() == False:
print("The Qwiic BME280 device isn't connected to the system. Please check your connection", \
file=sys.stderr)
return
mySensor.begin()
# setup the sensor
mySensor.filter = 1 # 0 to 4 is valid. Filter coefficient. See 3.4.4
mySensor.standby_time = 0 # 0 to 7 valid. Time between readings. See table 27.
mySensor.over_sample = 1 # 0 to 16 are valid. 0 disables temp sensing. See table 24.
mySensor.pressure_oversample = 1 # 0 to 16 are valid. 0 disables pressure sensing. See table 23.
mySensor.humidity_oversample = 1 # 0 to 16 are valid. 0 disables humidity sensing. See table 19.
mySensor.mode = mySensor.MODE_NORMAL # MODE_SLEEP, MODE_FORCED, MODE_NORMAL is valid. See 3.3
while True:
print("Humidity:\t%.3f" % mySensor.humidity)
print("Pressure:\t%.3f" % mySensor.pressure)
print("Altitude:\t%.3f" % mySensor.altitude_feet)
print("Temperature:\t%.2f\n" % mySensor.temperature_fahrenheit)
time.sleep(1)
def runSensors():
myBME280 = qwiic_bme280.QwiicBme280()
myCCS811 = qwiic_ccs811.QwiicCcs811()
if my BME280.is_connected() == False:
print("The Qwiic BME280 device isn't connected to the system. Please check your connection", \
file=sys.stderr)
return
def runExample():
print("\nSparkFun BME280 Sensor Example 1\n")
mySensor = qwiic_bme280.QwiicBme280()
if mySensor.connected == False:
print("The Qwiic BME280 device isn't connected to the system. Please check your connection", \
file=sys.stderr)
return
mySensor.begin()
while True:
print("Humidity:\t%.3f" % mySensor.humidity)
print("Pressure:\t%.3f" % mySensor.pressure)
print("Altitude:\t%.3f" % mySensor.altitude_feet)
print("Temperature:\t%.2f" % mySensor.temperature_fahrenheit)
print("")
time.sleep(1)
import qwiic_bme280
import time
import sys
print("\nSparkFun BME280 Sensor Example 1\n")
mySensor = qwiic_bme280.QwiicBme280()
if mySensor.connected == False:
print("The Qwiic BME280 device isn't connected to the system. Please check your connection", \
file=sys.stderr)
else:
mySensor.begin()
while True:
print("Humidity:\t%.3f" % mySensor.humidity)
print("Pressure:\t%.3f" % mySensor.pressure)
print("Altitude:\t%.3f" % mySensor.altitude_feet)
print("Temperature:\t%.2f" % mySensor.temperature_fahrenheit)
print("")
time.sleep(1)
def runExample():
mySensor = qwiic_bme280.QwiicBme280()
mySensor.begin()
tempC = "%.2f" % mySensor.temperature_celsius
print("temp_ambient", tempC)
print("Scanning for Qwiic Devices...")
print()
devices = qwiic.list_devices()
if len(devices) == 0:
print("No Devices Found!")
exit(1)
print("Found the following device(s):")
for device in devices:
print(device[1])
myJoystick = qwiic_joystick.QwiicJoystick()
bme280 = qwiic_bme280.QwiicBme280()
ccs811 = qwiic_ccs811.QwiicCcs811()
if myJoystick.connected == True:
useJoystick = True
myJoystick.begin()
if bme280.connected == True:
useBme280 = True
bme280.begin()
bme280.filter = 1 # 0 to 4 is valid. Filter coefficient. See 3.4.4
bme280.standby_time = 0 # 0 to 7 valid. Time between readings. See table 27.
bme280.over_sample = 1 # 0 to 16 are valid. 0 disables temp sensing. See table 24.
bme280.pressure_oversample = 1 # 0 to 16 are valid. 0 disables pressure sensing. See table 23.
def runExample():
print("\nSparkFun BME280 Sensor Example 5\n")
mySensor = qwiic_bme280.QwiicBme280()
if mySensor.connected == False:
print("The Qwiic BME280 device isn't connected to the system. Please check your connection", \
file=sys.stderr)
return
mySensor.begin()
print(
"ID(0xD0): 0x%.2x" %
mySensor._i2c.readByte(mySensor.address, mySensor.BME280_CHIP_ID_REG))
print("Reset register(0xE0): 0x%.2x" %
mySensor._i2c.readByte(mySensor.address, mySensor.BME280_RST_REG))
print("ctrl_meas(0xF4): 0x%.2x" % mySensor._i2c.readByte(
mySensor.address, mySensor.BME280_CTRL_MEAS_REG))
print("ctrl_hum(0xF2): 0x%.2x\n" % mySensor._i2c.readByte(
mySensor.address, mySensor.BME280_CTRL_HUMIDITY_REG))
print("Displaying all regs:")
memCounter = 0x80
for row in range(8, 16):
print("0x%.2x 0:" % row, end='')
for column in range(0, 16):
tempReadData = mySensor._i2c.readByte(mySensor.address, memCounter)
print("0x%.2x " % tempReadData, end='')
memCounter += 1
print("")
print("Displaying concatenated calibration words:")
print("dig_T1, uint16: %d" % mySensor.calibration["dig_T1"])
print("dig_T2, int16: %d" % mySensor.calibration["dig_T2"])
print("dig_T3, int16: %d" % mySensor.calibration["dig_T3"])
print("dig_P1, uint16: %d" % mySensor.calibration["dig_P1"])
print("dig_P2, int16: %d" % mySensor.calibration["dig_P2"])
print("dig_P3, int16: %d" % mySensor.calibration["dig_P3"])
print("dig_P4, int16: %d" % mySensor.calibration["dig_P4"])
print("dig_P5, int16: %d" % mySensor.calibration["dig_P5"])
print("dig_P6, int16: %d" % mySensor.calibration["dig_P6"])
print("dig_P7, int16: %d" % mySensor.calibration["dig_P7"])
print("dig_P8, int16: %d" % mySensor.calibration["dig_P8"])
print("dig_P9, int16: %d" % mySensor.calibration["dig_P9"])
print("dig_H1, uint8: %d" % mySensor.calibration["dig_H1"])
print("dig_H2, int16: %d" % mySensor.calibration["dig_H2"])
print("dig_H3, uint8: %d" % mySensor.calibration["dig_H3"])
print("dig_H4, int16: %d" % mySensor.calibration["dig_H5"])
print("dig_H6, int8: %d" % mySensor.calibration["dig_H6"])
while True:
print("Humidity:\t%.3f" % mySensor.humidity)
print("Pressure:\t%.3f" % mySensor.pressure)
print("Altitude:\t%.3f" % mySensor.altitude_feet)
print("Temperature:\t%.2f\n" % mySensor.temperature_fahrenheit)
time.sleep(1)
def main():
constants.hostname = socket.gethostname()
if ((len(constants.hostname) < 1)
or (constants.hostname == "undefined")):
print("could not determine hostname")
sys.exit()
os.chdir("/home/pi/Projects/sensor-box")
logger.logEvent("sensor-box.py started at " + str(datetime.datetime.now()))
# using CCS811 mode 1 for internal measurement every second
ccs811Sensor = qwiic_ccs811.QwiicCcs811()
bme280Sensor = qwiic_bme280.QwiicBme280()
if (HASPM25):
pm25Sensor = smbus.SMBus(1)
pm1count = -1
pm10count = -1
pm25count = -1
if (ccs811Sensor.connected == False) or (bme280Sensor.connected == False):
logger.logEvent("failed to connect to sensors")
sys.exit(-1)
ccs811Sensor.begin()
bme280Sensor.begin()
yesterday = 0
today = 1
baseValues = [ 0, 0, 0, 0, 0, 0]
baseValueSet = False
baseValue = 0
baseIndex = 0
config = constants.hostname + ".conf"
if (exists(config)):
with open(config) as c:
baseValue = int(c.read())
ccs811Sensor.set_baseline(baseValue)
baseValueSet = True
if (DEBUG):
print("read baseline from " + config)
while True:
today = time.localtime().tm_mday
if (yesterday != today):
if (DEBUG):
print("yesterday", yesterday, "not equal to today",today)
logger.logEvent("yesterday " + str(yesterday) + " not equal to today " + str(today))
uptime = os.popen('uptime -s').read() [:-1]
logger.logSensorHeader("#boot time " + uptime)
logger.logSensorHeader("time,temp,humid,CO2,tVOC,PM1.0,PM2.5,PM10.0")
logger.logEventHeader("#boot time " + uptime)
logger.logEventHeader("#description of event")
baseline = ccs811Sensor.get_baseline()
logger.logEvent("#baseline at day rollover " + str(baseline))
yesterday = today
if (baseline != baseValue) and (baseValueSet == True):
if (DEBUG):
logger.logEvent("#baseline " + str(baseline) + " does not match baseValue " + str(baseValue) + ", resetting")
ccs811Sensor.set_baseline(baseValue)
if (baseValueSet == False):
interval = 10
if ((time.localtime().tm_min % interval) == 0):
baseline = ccs811Sensor.get_baseline()
if (baseline >= constants.maxBaseline):
if (DEBUG):
logger.logEvent("baseline too high, using 0: " + str(baseline))
baseline = 0
if (DEBUG):
logger.logEvent("#baseline " + str(interval) + " min read " + str(baseline))
baseValues[baseIndex] = baseline
baseIndex +=1
logger.logEvent("#basevalues " + str(baseValues))
if (baseIndex == 6):
baseIndex = 0
if (checkBaseline(baseValues)):
logger.logEvent("#baseline set to " + str(baseline))
baseValue = baseline
ccs811Sensor.set_baseline(baseValue)
with open(config, 'w') as c:
c.write(str(baseValue))
baseValueSet = True
else:
interval = 10
if ((time.localtime().tm_min % interval) == 0):
baseline = ccs811Sensor.get_baseline()
if (DEBUG):
logger.logEvent("#baseline " + str(interval) + " min read " + str(baseline))
if (baseline != baseValue) and (baseValueSet == True):
if (DEBUG):
logger.logEvent("#baseline " + str(baseline) + " does not match baseValue " + str(baseValue) + ", resetting")
ccs811Sensor.set_baseline(baseValue)
humidity = bme280Sensor.humidity
if (HASPM25):
pm25Data = pm25Sensor.read_i2c_block_data(0x12, 0x00, 32)
pm1count = (pm25Data[4]<<8) + pm25Data[5]
pm10count = (pm25Data[8]<<8) + pm25Data[9]
pm25count = (pm25Data[6]<<8) + pm25Data[7]
tempCelsius = bme280Sensor.temperature_celsius
ccs811Sensor.set_environmental_data(humidity, tempCelsius)
#TODO my stretto reads 4C lower than the reported temperature
#tempCelsius -= 4
if ccs811Sensor.data_available():
ccs811Sensor.read_algorithm_results()
if (ccs811Sensor.CO2 > 2**14):
logString = '#error CO2 {:.2f}'.format(ccs811Sensor.CO2)
logger.logEvent(logString)
elif (ccs811Sensor.TVOC > 2**14):
logString = '#error tVOC {:.2f}'.format(ccs811Sensor.TVOC)
logger.logEvent(logString)
else:
logString = '{:.2f},{:.2f},{:d},{:d},{:d},{:d},{:d}'.format(
tempCelsius, humidity,
ccs811Sensor.CO2,
ccs811Sensor.TVOC,
pm1count, pm25count, pm10count)
logger.logSensor(logString)
if DEBUG:
print(logString)
time.sleep(60)
