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CloudThingSpeak.py
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CloudThingSpeak.py
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#-------------------------------------------------------------------------------
# Copyright 2016 Congduc Pham, University of Pau, France.
#
#
# This file is part of the low-cost LoRa gateway developped at University of Pau
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with the program. If not, see <http://www.gnu.org/licenses/>.
#-------------------------------------------------------------------------------
# Jul/2016 adapted by N. Bertuol under C. Pham supervision
#
#
# Oct/2016. re-designed by C. Pham to use self-sufficient script per cloud
import urllib2
import subprocess
import time
import ssl
import socket
import datetime
import sys
import re
# get key definition from external file to ease
# update of cloud script in the future
import key_ThingSpeak
# didn't get a response from thingspeak server?
connection_failure = False
# retry if return from server is 0?
retry = False
#plot snr instead of seq
_thingspeaksnr=False
# function to check connection availability with the server
def test_network_available():
connection = False
iteration = 0
response = None
# we try 4 times to connect to the server.
while(not connection and iteration < 4) :
try:
# 3sec timeout in case of server available but overcrowded
response=urllib2.urlopen('https://api.thingspeak.com/', timeout=3)
connection = True
except urllib2.URLError, e: pass
except socket.timeout: pass
except ssl.SSLError: pass
# if connection_failure == True and the connection with the server is unavailable, don't waste more time, exit directly
if(connection_failure and response is None) :
print('Thingspeak: the server is still unavailable')
iteration = 4
# print connection failure
elif(response is None) :
print('Thingspeak: server unavailable, retrying to connect soon...')
# wait before retrying
time.sleep(1)
iteration += 1
return connection
# send a data to the server
def send_data(data, second_data):
global connection_failure
print 'rcv msg to log (\!) on ThingSpeak (',
#use default channel?
if data[0]=='':
data[0]=key_ThingSpeak._def_thingspeak_channel_key
print 'default',
else:
print data[0],
print ',',
#use default field?
if data[1]=='':
data[1]='1'
print 'default',
else:
print data[1],
print '): '+data[2]
#in the current example, log the data on the specified field x, then log the sequence number on field x+4
#assuming that the first 4 fields are used for up to 4 sensors and the next 4 fields are used for their sequence number
cmd = 'curl -s -k -X POST --data '+\
'field'+data[1]+'='+data[2]+\
'&field'+str(int(data[1])+4)+'='+second_data+\
' https://api.thingspeak.com/update?key='+data[0]
print("ThingSpeak: will issue curl cmd")
print(cmd)
args = cmd.split()
#retry enabled
if (retry) :
out = '0'
iteration = 0
while(out == '0' and iteration < 6 and not connection_failure) :
try:
out = subprocess.check_output(args, shell=False)
#if server return 0, we didn't wait 15sec, wait then
if(out == '0'):
print('ThingSpeak: less than 15sec between posts, retrying in 3sec')
iteration += 1
time.sleep( 3 )
else:
print('ThingSpeak: returned code from server is %s' % out)
except subprocess.CalledProcessError:
print("ThingSpeak: curl command failed (maybe a disconnection)")
#update connection_failure
connection_failure = True
#retry disabled
else :
try:
out = subprocess.check_output(args, shell=False)
if (out == '0'):
print('ThingSpeak: returned code from server is %s, do not retry' % out)
else :
print('ThingSpeak: returned code from server is %s' % out)
except subprocess.CalledProcessError:
print("ThingSpeak: curl command failed (maybe a disconnection)")
connection_failure = True
def thingspeak_uploadSingleData(data, second_data):
global connection_failure
connected = test_network_available()
# if we got a response from the server, send the data to it
if(connected):
connection_failure = False
print("ThingSpeak: uploading")
send_data(data, second_data)
else:
connection_failure = True
if(connection_failure):
print("ThingSpeak: not uploading")
# upload multiple data
def thingspeak_uploadMultipleData(data_array):
global connection_failure
connected = test_network_available()
# if we got a response from the server, send the data to it
if(connected):
connection_failure = False
#use default channel?
if data_array[0]=='':
data_array[0]=key_ThingSpeak._def_thingspeak_channel_key
print 'default',
else:
print data_array[0],
# we ignore the field and the channel for the moment
iteration = 3
fieldNumber = 1
cmd = 'curl -s -k -X POST --data '
while(iteration<len(data_array)):
if(iteration == 3):
cmd += 'field'+str(fieldNumber)+'='+data_array[iteration]
else:
cmd += '&field'+str(fieldNumber)+'='+data_array[iteration]
# don't get the nomenclature so += 2
iteration += 2
fieldNumber += 1
cmd += ' https://api.thingspeak.com/update?key='+data_array[0]
print("ThingSpeak: will issue curl cmd")
print(cmd)
args = cmd.split()
#retry enabled
if (retry) :
out = '0'
iteration = 0
while(out == '0' and iteration < 6 and not connection_failure) :
try:
out = subprocess.check_output(args, shell=False)
#if server return 0, we didn't wait 15sec, wait then
if(out == '0'):
print('ThingSpeak: less than 15sec between posts, retrying in 3sec')
iteration += 1
time.sleep( 3 )
else:
print('ThingSpeak: returned code from server is %s' % out)
except subprocess.CalledProcessError:
print("ThingSpeak: curl command failed (maybe a disconnection)")
#update connection_failure
connection_failure = True
#retry disabled
else :
try:
out = subprocess.check_output(args, shell=False)
if (out == '0'):
print('ThingSpeak: returned code from server is %s, do not retry' % out)
else :
print('ThingSpeak: returned code from server is %s' % out)
except subprocess.CalledProcessError:
print("ThingSpeak: curl command failed (maybe a disconnection)")
connection_failure = True
else:
connection_failure = True
if(connection_failure):
print("ThingSpeak: not uploading")
def thingspeak_setRetry(retry_bool):
global retry
retry = retry_bool
# main
# -------------------
def main(ldata, pdata, rdata, tdata, gwid):
# this is common code to process packet information provided by the main gateway script (i.e. post_processing_gw.py)
# these information are provided in case you need them
arr = map(int,pdata.split(','))
dst=arr[0]
ptype=arr[1]
src=arr[2]
seq=arr[3]
datalen=arr[4]
SNR=arr[5]
RSSI=arr[6]
# this part depends on the syntax used by the end-device
# we use: thingspeak_channel#thingspeak_field#TC/22.4/HU/85...
# ##TC/22.4/HU/85... or TC/22.4/HU/85... or thingspeak_channel##TC/22.4/HU/85... or #thingspeak_field#TC/22.4/HU/85... to use some default value
# get number of '#' separator
nsharp = ldata.count('#')
#no separator
if nsharp==0:
#will use default channel and field
data=['','']
#contains ['', '', "s1", s1value, "s2", s2value, ...]
data_array = data + re.split("/", ldata)
elif nsharp==1:
#only 1 separator
data_array = re.split("#|/", ldata)
#if the first item has length > 1 then we assume that it is a channel write key
if len(data_array[0])>1:
#insert '' to indicate default field
data_array.insert(1,'');
else:
#insert '' to indicate default channel
data_array.insert(0,'');
else:
#contains [channel, field, "s1", s1value, "s2", s2value, ...]
data_array = re.split("#|/", ldata)
#just in case we have an ending CR or 0
data_array[len(data_array)-1] = data_array[len(data_array)-1].replace('\n', '')
data_array[len(data_array)-1] = data_array[len(data_array)-1].replace('\0', '')
#test if there are characters at the end of each value, then delete these characters
i = 3
while i < len(data_array) :
while not data_array[i][len(data_array[i])-1].isdigit() :
data_array[i] = data_array[i][:-1]
i += 2
# get number of '/' separator
nslash = ldata.count('/')
index_first_data = 2
if nslash==0:
# old syntax without nomenclature key
index_first_data=2
else:
# new syntax with nomenclature key
index_first_data=3
second_data=str(seq)
if (_thingspeaksnr):
second_data=str(SNR)
#data to send to thingspeak
data = []
data.append(data_array[0]) #channel (if '' default)
data.append(data_array[1]) #field (if '' default)
data.append(data_array[index_first_data]) #value to add (the first sensor value in data_array)
#upload data to thingspeak
#JUST FOR UPLOAD A SINGLE DATA IN A SPECIFIC FIELD AND SECOND DATA
thingspeak_uploadSingleData(data, second_data)
# if you want to upload all data starting at field 1, uncomment next line, and comment previous line
#thingspeak_uploadMultipleData(data_array) # upload all data in the fields
if __name__ == "__main__":
main(sys.argv[1], sys.argv[2], sys.argv[3], sys.argv[4], sys.argv[5])