# Demo to show a simple MQTT subscriber to BayEOS Gateway bridge
# Oliver Archner
# 29.07.2015
from bayeosgatewayclient import BayEOSWriter, BayEOSSender
import paho.mqtt.client as mqtt
# BayEOS sender
sender = BayEOSSender(
url='http://bayconf.bayceer.uni-bayreuth.de/gateway/frame/saveFlat',
user='******',
password='******')
sender.start()
# BayEOS writer
writer = BayEOSWriter()
# MQTT connect and subscribe
def on_connect(client, userdata, rc):
print("Connected with result code:{0}".format(rc))
# Subscribe everything
client.subscribe("#")
# MQTT receive and save message
def on_message(client, userdata, msg):
# Expects a payload in csv format like '1.0,2.0,3.0,4.0'
try:
lst = msg.payload.split(',')
writer.save(values=[float(i) for i in lst], origin=str(msg.topic))
mean_temp = numpy.mean(temp)
var_temp = numpy.var(temp)
mean_hum = numpy.mean(hum)
var_hum = numpy.var(hum)
lin_model = stats.linregress(measured_seconds, co2)
slope = lin_model[0]
intercept = lin_model[1]
r_squared = lin_model[2] * lin_model[2]
slope_err = lin_model[4]
return [
mean_temp, var_temp, mean_hum, var_hum, slope, intercept, r_squared,
slope_err
]
sender.start() # starts sender in a concurrent thread
try:
while True:
for addr in range(1,
15): # address 0 is reserved for flushing with air
gpio.set_addr(0) # set flushing address
sleep(60) # flush for 60 seconds
gpio.reset() # stop flushing
gpio.set_addr(addr) # start measuring wait 60 seconds, 240 measure
writer.save(measure(30),
origin="RaspberryPi Kammer Nr. " + str(addr))
writer.flush() # close the file in order to "feed" sender
gpio.reset()
except KeyboardInterrupt:
"""Creates an example writer and sender using threads."""
from time import sleep
from bayeosgatewayclient import BayEOSWriter, BayEOSSender
import logging
PATH = '/tmp/bayeos-device/'
NAME = 'Python-Thread-WithLogging'
URL = 'http://bayconf.bayceer.uni-bayreuth.de/gateway/frame/saveFlat'
writer = BayEOSWriter(PATH,max_time=10,log_level=logging.DEBUG)
writer.save_msg('Writer was started.')
sender = BayEOSSender(PATH, NAME, URL,backup_path='/dev/shm/bayeos-device')
sender.start()
while True:
writer.save([2.1, 3, 20.5])
sleep(5)
start_new_thread(hum.append, (sht21.read_humidity(),))
start_new_thread(co2.append, (mcp3424.read_voltage(1),))
measured_seconds.append(time())
sleep(start_time + i - time() + 1) # to keep in time
mean_temp = numpy.mean(temp)
var_temp = numpy.var(temp)
mean_hum = numpy.mean(hum)
var_hum = numpy.var(hum)
lin_model = stats.linregress(measured_seconds, co2)
slope = lin_model[0]
intercept = lin_model[1]
r_squared = lin_model[2]*lin_model[2]
slope_err = lin_model[4]
return [mean_temp, var_temp, mean_hum, var_hum, slope, intercept, r_squared, slope_err]
sender.start() # starts sender in a concurrent thread
try:
while True:
for addr in range(1, 15): # address 0 is reserved for flushing with air
gpio.set_addr(0) # set flushing address
sleep(60) # flush for 60 seconds
gpio.reset() # stop flushing
gpio.set_addr(addr) # start measuring wait 60 seconds, 240 measure
writer.save(measure(30), origin="RaspberryPi Kammer Nr. " + str(addr))
writer.flush() # close the file in order to "feed" sender
gpio.reset()
except KeyboardInterrupt:
print 'Stopped measurement loop.'
finally:
