def _read_am2302(pin, para):
#http://www.home-automation-community.com/temperature-and-humidity-from-am2302-dht22-sensor-displayed-as-chart/
with Timeout(seconds=2.5):
humidity, temperature = Adafruit_DHT.read(Adafruit_DHT.AM2302, pin)
if para == 'temperature':
v = float(temperature)
if v > 150.:
print '_read_am2302: temperature is too high %s' % v
raise BaseException('temperature is too high %s' % v)
if v < -55.:
print '_read_am2302: temperature is too low %s' % v
raise BaseException('temperature is too low %s' % v)
return v
elif para == 'humidity':
v = float(humidity)
if v > 100.:
print 'humidity is too high %s' % v
raise BaseException('humidity is too high %s' % v)
if v < 0.:
print 'humidity is too low %s' % v
raise BaseException('humidity is too low %s' % v)
return v
else:
print '! _read_am2302: para should be either temperatue or humidity'
raise BaseException('para should be either temperatue or humidity')
def get_time_error():
"""
gets time error in seconds
"""
try:
with Timeout(seconds=16):
import dateutil.parser
import pytz
import ssl
t1 = time.time()
#resp = urllib2.urlopen(r'https://script.google.com/macros/s/AKfycbyd5AcbAnWi2Yn0xhFRbyzS4qMq1VucMVgVvhul5XqS9HkAyJY/exec', timeout=15).read().strip()
resp = urllib2.urlopen(urllib2.Request('https://script.google.com/macros/s/AKfycbyd5AcbAnWi2Yn0xhFRbyzS4qMq1VucMVgVvhul5XqS9HkAyJY/exec'), context=ssl._create_unverified_context()).read()
jresp = json_util.loads(resp)
if not (jresp['timezone'].lower()=="utc"):
print ">> timecheck: !!!Time error might not be UTC"
raise BaseException('')
t2 = time.time()
time_needed = (t2 - t1)
correction = time_needed/2.
dt_internet = dateutil.parser.parse(jresp['fulldate']).astimezone(pytz.utc)
seconds = (datetime.datetime.utcnow().replace(tzinfo=pytz.utc) - dt_internet).total_seconds() - correction
return seconds
except:
print ">> timecheck: could not get time_error"
return None
def create_tunnel(slave_port, tunnel_para):
with Timeout(seconds=30):
website.processing.execute(
'sudo chmod 700 /home/pi/rpislave/tunnelonly')
revssh_line = 'sudo ssh -o TCPKeepAlive=no -o ExitOnForwardFailure=yes -o StrictHostKeyChecking=no -o ServerAliveInterval=30 -o ServerAliveCountMax=2 -i /home/pi/rpislave/tunnelonly -R \*:%s:localhost:%s -N ubuntu@%s' % (
tunnel_para['server_port'], slave_port, tunnel_para['server_ip'])
print ">> status: creating tunnel: %s" % revssh_line
website.processing.execute(revssh_line, daemon=True)
def restart_networking():
try:
with Timeout(seconds=30):
print ">> status: not connected to internet, will attempt to restart network"
print '>> status: sudo /etc/init.d/networking stop'
website.processing.execute('sudo /etc/init.d/networking stop')
print '>> status: sudo /etc/init.d/networking start'
website.processing.execute('sudo /etc/init.d/networking start')
#execute("sudo sed -i '1s/^/nameserver 8.8.8.8\n/' /etc/resolv.conf")
time.sleep(3)
except:
pass
def _read_ds18b20(id):
with Timeout(seconds=1.1):
base_dir = '/sys/bus/w1/devices'
device_folder = base_dir + '/' + id
reading_file = device_folder + '/' + 'w1_slave'
f = open(reading_file, 'r')
text = f.read(
) #text = 'd5 01 55 00 7f ff 0c 10 11 : crc=11 YES\nd5 01 55 00 7f ff 0c 10 11 t=29312\n'
if not ("YES" in text):
raise BaseException('YES is not in text')
f.close()
raw = re.compile(r'(.+)t=(?P<raw>[-+]?\d+)(.+)',
flags=re.DOTALL).match(text).groupdict()['raw']
v = float(raw) / 1000.
if v == -62.0 or v == 85.0:
raise BaseException(
'ds18b20 temperature value -62 or 85 which is an error code of the sensor %s'
% v)
if v < -55. or v > 125.:
raise BaseException('ds18b20 temperature value out of range')
return v #this number is in celsuis, could be positive or negative
def _read_hcsr04(pin_trig, pin_echo):
"""
this is a sensor to measure distances
"""
with Timeout(seconds=2.0): #not sure about the length of this time
GPIO.setmode(GPIO.BCM)
#pin_trig = 23
#pin_echo = 24
GPIO.setup(pin_trig, GPIO.OUT)
GPIO.setup(pin_echo, GPIO.IN)
#sending the triger signal
GPIO.output(pin_trig, False)
sleep(0.5) #wait for sensor to settle
GPIO.output(pin_trig, True)
sleep(0.00001)
GPIO.output(pin_trig, False)
#reading the echo signal
while GPIO.input(pin_echo) == 0:
pass
pulse_start = time()
while GPIO.input(pin_echo) == 1:
pass
pulse_end = time()
pulse_duration = pulse_end - pulse_start
#measuring distance
distance = pulse_duration * 17150
distance = round(distance, 2)
distance = distance - 0.5
if distance > 2 - 0.5 and distance < 400 - 0.5:
return distance
else:
raise BaseException('distance is out of acceptable range %s' %
distance)
def get_status():
def gitcmd(cmd):
r = website.processing.execute(cmd).strip()
#"/bin/sh: 1: cd: can't cd to /home/pi/rpislave_conf\n"
#'fatal: Not a git repository (or any of the parent directories): .git\n'
if ("cd to " in r) or ("Not a git" in r):
return '-'
else:
return r
d = {}
try:
with Timeout(seconds=30):
resp = urllib2.urlopen('http://api.ipify.org?format=json').read()
d['ip_wan'] = json.loads(resp)['ip']
except:
d['ip_wan'] = "-"
pass
#CPU
try:
with Timeout(seconds=10):
resp = website.processing.execute("cat /proc/cpuinfo")
d['serial'] = [x for x in resp.split("\n")
if "Serial" in x][0].split()[-1]
except:
d['serial'] = "-"
pass
try:
with Timeout(seconds=30):
resp = website.processing.execute("cat /proc/cpuinfo")
d['revision'] = [x for x in resp.split("\n")
if "Revision" in x][0].split()[-1]
except:
d['revision'] = "-"
pass
#GIT
try:
with Timeout(seconds=30):
d['git_rpislave'] = gitcmd(
"cd /home/pi/rpislave&&git rev-parse HEAD")
d['gitbranch_rpislave'] = gitcmd(
"cd /home/pi/rpislave&&git rev-parse --abbrev-ref HEAD")
except:
d['git_rpislave'] = '-'
d['gitbranch_rpislave'] = '-'
#IP
try:
with Timeout(seconds=30):
resp = website.processing.execute("ifconfig")
d['ip_lan'] = "192.168.{0[p3]}.{0[p4]}".format(
re.compile(
r'(.+)inet addr:192\.168\.(?P<p3>\d+)\.(?P<p4>\d+)(.+)',
flags=re.DOTALL).match(resp).groupdict())
except:
d['ip_lan'] = "-"
try:
with Timeout(seconds=30):
resp = website.processing.execute("ifconfig")
d['ip_vlan'] = "10.0.{0[p3]}.{0[p4]}".format(
re.compile(
r'(.+)inet addr:10\.0\.(?P<p3>\d+)\.(?P<p4>\d+)(.+)',
flags=re.DOTALL).match(resp).groupdict())
except:
d['ip_vlan'] = "-"
return d