# 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))
"""Creates an example writer and sender using threads."""
from time import sleep
from bayeosgatewayclient import BayEOSWriter, BayEOSSender
import logging
import tempfile
from os import path
PATH = path.join(tempfile.gettempdir(), 'bayeos-device')
BACKUP_PATH = path.join(tempfile.gettempdir(), 'bayeos-device-backup')
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=BACKUP_PATH,
log_level=logging.DEBUG)
sender.start()
nr = 0
while True:
writer.save([nr, 3, 20.5])
#writer.flush()
nr += 1
sleep(5)
"""Reads BayEOS options from a config file."""
from bayeosgatewayclient import BayEOSWriter, BayEOSSender, bayeos_confparser
config = bayeos_confparser('config')
print config
writer = BayEOSWriter(path=config['path'], max_chunk=config['max_chunk'])
sender = BayEOSSender(path=config['path'])
from sht21 import SHT21
from mcp3424 import MCP3424
from gpio import GPIO
# gpio pins
ADDR_PINS = [11, 12, 13, 15, 16, 18] # GPIO 17, 18, 27, 22, 23, 24
DATA_PIN = 24 # GPIO 8
EN_PIN = 26 # GPIO 7
# configuration for BayEOSWriter and BayEOSSender
PATH = '/tmp/raspberrypi/'
NAME = 'RaspberryPi'
URL = 'http://bayconf.bayceer.uni-bayreuth.de/gateway/frame/saveFlat'
# instantiate objects of BayEOSWriter and BayEOSSender
writer = BayEOSWriter(PATH)
sender = BayEOSSender(PATH, NAME, URL)
# initialize GPIO Board on Raspberry Pi
gpio = GPIO(ADDR_PINS, EN_PIN, DATA_PIN)
# initialize I2C Bus with sensors
try:
i2c = I2C()
sht21 = SHT21(1)
mcp3424 = MCP3424(i2c.get_smbus())
except IOError as err:
sys.stderr.write(
'I2C Connection Error: ' + str(err) +
'. This must be run as root. Did you use the right device number?')
"""Creates an example writer and flushes it before max chunk size is reached."""
from time import sleep
from bayeosgatewayclient import BayEOSWriter
PATH = '/tmp/bayeos-device1/'
writer = BayEOSWriter(PATH, max_chunk=1000)
writer.save_msg('Writer was started.', origin='Python-Writer-Flush-Example')
flush = 0
while True:
#print 'adding frame\n'
writer.save(values=[2.1, 3, 20.5],
value_type=0x02,
offset=2,
origin='Python-Writer-Flush-Example')
flush += 1
if flush % 5 == 0: # flush writer every 5 seconds
writer.save_msg('Writer was flushed.',
origin='Python-Writer-Flush-Example')
writer.flush()
print 'flushed writer'
flush = 0
sleep(1)
from bayeosgatewayclient import BayEOSWriter, BayEOSSender, bayeos_argparser
# Fetch input arguments
args = bayeos_argparser('This is the text to appear on the command line.')
WRITER_SLEEP = float(args.writer_sleep)
MAX_CHUNK = float(args.max_chunk)
NAME = args.name + '-WS' + str(WRITER_SLEEP) + '-M' + str(MAX_CHUNK)
PATH = args.path + '/' + NAME + '/'
if args.url:
URL = args.url
else:
URL = 'http://bayconf.bayceer.uni-bayreuth.de/gateway/frame/saveFlat'
print 'name to appear in Gateway is', NAME
print 'max-chunk is', MAX_CHUNK, 'byte'
print 'writer sleep time is', WRITER_SLEEP, 'sec'
print 'path to store writer files is', PATH
# init writer and sender
writer = BayEOSWriter(PATH, MAX_CHUNK)
writer.save_msg('Writer was started.')
sender = BayEOSSender(PATH, NAME, URL, 'import', 'import')
sender.start()
# start measurement
while True:
writer.save([time()], value_type=0x21)
sleep(WRITER_SLEEP)
