HOW TO: Make Udoo Neo an IoT Gateway of Sensors

I have no experience with services on Linux. On windows I know it doesn't like print to console but I don't know what other conditions Linux has on services. Perhaps someone else here could assist?

 

I've created multiple services on Linux. I always start out by copying a simple script from another service. Not that it has to be executable (as root) and should be registered before it is automatically started.

Here is a tutorial on Upstart, hope that helps.

 

Please check the following code, because it produces "strange" feedback. I use 4 different sensors in udoo neo, which produces 5 outcomes and should "fill" the 5 correspondive thingspeak fields of the same channel.
The code returns results that fill only the two first fields, but the problem is that all the printed serial values appear in the first two filelds

2017-01-03 21:17:13+0200,
1084,
"1050.00,25.00,18.00,55,705.00", "1050.00,33.00,18.00,54,705.00", 0,0,0

2017-01-03 21:17:33 +0200,
1085,
"1350.00,33.00,18.00,55,705.00",0,0,0,0

2017-01-03 21:17:54+0200,
1086,
"1700.00,25.00,18.00,55,705.00",0,0,0,0

2017-01-03 21:18:17 +0200,
1087,
"1900.00,33.00,18.00,55,705.00","1900.00,24.00,18.00,55,705.00",0,0,0

My code follows

#!/usr/bin/env python
# This program logs a Arduino Sensor on an Udoo Neo to a Thingspeak Channel
# To use, get a Thingspeak.com account, set up a channel,
# and capture the Channel Key at https://thingspeak.com/docs/tutorials/
# Then paste your channel ID in the code for the value of "key" below.
# Then run as sudo python UdooNeoSensor.py

import httplib, urllib
import time
import serial
# how many seconds to sleep between posts to the channel, API limit min 15 sec
sleep = 20
#'Put your Thingspeak Channel Key here' # Thingspeak channel to update
key = '**************'

DEBUG = False # set to True to get more debug prints in the Python console

#Create serial device for reading serial
arduino = serial.Serial('/dev/ttyMCC',9600,timeout=0)
arduino.flushOutput()
arduino.flushInput()
serial_buffer = ""
line = ""

# sensor coefficient name
sensorValue1 = '0'
temp1 = 0
sensorValue2 = '0'
temp2 = 0
sensorValue3 = '0'
temp3 = 0
#sensorValue4='0'
#temp4=0
#sensorValue5 = '0'
#temp5=0

#init for arduino so Arduino knows it can send data.
arduino.write("I\n")

def ReadArduino(arduino_out):
global serial_buffer, line
arduino_out = ""
serial_data = arduino.read() # Read 1 character
while serial_data: # If there is a character proceed
serial_buffer += serial_data # Add character to buffer
if DEBUG: print "ReadArduino:Serial buffer:",(repr(serial_buffer))
# if there is a new line in it, then create Line string
if "\r\n" in serial_buffer:
if DEBUG: print "ReadArduino:New Line:",(repr(serial_buffer))
line = serial_buffer
serial_buffer = "" # empty Serial buffer
serial_data = arduino.read()
# if there is a Line string then finish reading the Line
if line:
# strip string for unwanted characters
line = line.replace("\r\n", "")
#line = line.strip(",")
arduino_out = line
if DEBUG: print "ReadArduino:arduino_out:", arduino_out
line = ""
if arduino_out == "": arduino_out = None
# add the last character to the new buffer
serial_buffer += serial_data
return arduino_out

#Report Udoo Neo Arduino Sensor data to Thingspeak Channel
def writesensordata():
#global temp1, sensorValue1,temp2, sensorValue2,temp3, sensorValue3,temp4, sensorValue4,temp5, sensorValue5
global temp1, sensorValue1,temp2, sensorValue2,temp3, sensorValue3
while True:
#read arduino data and make it a integer value
sensorValue1 = ReadArduino(sensorValue1)
if sensorValue1 is None:
sensorValue1 = '0'
temp1 = (sensorValue1)
sensorValue2 = ReadArduino(sensorValue2)
if sensorValue2 is None:
sensorValue2 = '0'
temp2 = (sensorValue2)
sensorValue3 = ReadArduino(sensorValue3)
if sensorValue3 is None:
sensorValue3 = '0'
temp3 = (sensorValue3)
#sensorValue4 = ReadArduino(sensorValue4)
#if sensorValue4 is None:
# sensorValue4 = '0'
#temp4 = (sensorValue4)
#sensorValue5 = ReadArduino(sensorValue5)
#if sensorValue5 is None:
# sensorValue5 = '0'
#temp5 = (sensorValue5)
params = urllib.urlencode({'field1': temp1, 'field2': temp2,'field3': temp3,'key':key })
headers = {"Content-typZZe": "application/x-www-form-urlencoded","Accept": "text/plain"}
conn = httplib.HTTPConnection("api.thingspeak.com:80")
try:
conn.request("POST", "/update", params, headers)
response = conn.getresponse()
print temp1
print temp2
print temp3
print response.status, response.reason
data = response.read()
conn.close()
except:
print "connection failed"
break
#sleep for desired amount of time
if __name__ == "__main__":
while True:
writesensordata()
time.sleep(sleep)

Please help!!!

 

sorry the previous uploaded code is for three sensor values, but my problem is the same

 

my main problem is that the sensors values printed in the /dev/ttyMCC port (seperated with commas) cannot be distinguished and be assigned to the suitable field of my thingspeak channel.

 

I suppose it goes wrong in the line starting with params = urllib.urlencode.........

It looks like it is conflicting with strings, dots and quotes or something like that. I made integers of all the values, what if you do that too? Just to check if it works.

You could print params to the console to check that it is the root cause of your problem.

 

no changing to integers does not help. i have tried it.
there is not any problem when i check the values in the serial monitor

 

Please print the value of variable params. And check it.

I still believe you have a declaration issue:
You initialize for examples temp3 as an integer (=0) but you later make it a string as sensorvalue3 is a string.

 

surely, i declare sth wrong in the code, thats the reason i have wrong type results.
sensorvalues are declared as integer values in my arduino code.
please check the following python code

import httplib, urllib
import time
import serial
# how many seconds to sleep between posts to the channel, API limit min 15 sec
sleep = 20
#'Put your Thingspeak Channel Key here' # Thingspeak channel to update
key = '********** '

DEBUG = False # set to True to get more debug prints in the Python console

#Create serial device for reading serial
arduino = serial.Serial('/dev/ttyMCC',9600,timeout=0)
arduino.flushOutput()
arduino.flushInput()
serial_buffer = ""
line = ""

# sensor coefficient name
sensorValue1 = 0
temp1 = 0
sensorValue2 = 0
temp2 = 0
sensorValue3 = 0
temp3 = 0


#init for arduino so Arduino knows it can send data.
arduino.write("I\n")

def ReadArduino(arduino_out):
global serial_buffer, line
arduino_out = ""
serial_data = arduino.read() # Read 1 character
while serial_data: # If there is a character proceed
serial_buffer += serial_data # Add character to buffer
if DEBUG: print "ReadArduino:Serial buffer:",(repr(serial_buffer))
# if there is a new line in it, then create Line string
if "\r\n" in serial_buffer:
if DEBUG: print "ReadArduino:New Line:",(repr(serial_buffer))
line = serial_buffer
serial_buffer = "" # empty Serial buffer
serial_data = arduino.read()
# if there is a Line string then finish reading the Line
if line:
# strip string for unwanted characters
line = line.replace("\r\n", "")
#line = line.strip(",")
arduino_out = line
if DEBUG: print "ReadArduino:arduino_out:", arduino_out
line = ""
if arduino_out == "": arduino_out = None
# add the last character to the new buffer
serial_buffer += serial_data
return arduino_out

#Report Udoo Neo Arduino Sensor data to Thingspeak Channel
def writesensordata():
#global temp1, sensorValue1,temp2, sensorValue2,temp3, sensorValue3,temp4, sensorValue4,temp5, sensorValue5
global temp1, sensorValue1,temp2, sensorValue2,temp3, sensorValue3
while True:
#read arduino data and make it a integer value
sensorValue1 = ReadArduino(sensorValue1)
if sensorValue1 is None:
sensorValue1 = '0'
#temp1 = sensorValue1
sensorValue2 = ReadArduino(sensorValue2)
if sensorValue2 is None:
sensorValue2 = '0'
#temp2 = sensorValue2
sensorValue3 = ReadArduino(sensorValue3)
if sensorValue3 is None:
sensorValue3 = '0'
#temp3 = sensorValue3
params = urllib.urlencode({'field1': sensorValue1, 'field2': sensorValue2,'field3': sensorValue3,'key':key })
headers = {"Content-typZZe": "application/x-www-form-urlencoded","Accept": "text/plain"}
conn = httplib.HTTPConnection("api.thingspeak.com:80")
try:
conn.request("POST", "/update", params, headers)
response = conn.getresponse()
print sensorValue1
print sensorValue2
print sensorValue3
print response.status, response.reason
data = response.read()
conn.close()
except:
print "connection failed"
break
#sleep for desired amount of time
if __name__ == "__main__":
while True:
writesensordata()
time.sleep(sleep)

there is no temp values, affecting the code and still i have the same results

{"channel":{"id":207669,"name":"MyUdooAllSensors","description":"
Udoo Neo Project that contains Light, Humidity, Temperature,

"field1":"sensorValue1","field2":"sensorValue2","field3":"sensorValue3",

"created_at":"2016-12-28T13:21:53Z",
"updated_at":"2017-01-04T13:55:01Z",
"entry_id":1391,"field1":"150,33,19","field2":"150,22,17","field3":"0"}]}
"entry_id":1480,"field1":"150,23,18","field2":"150,22,18","field3":"0"},
{"created_at":"2017-01-04T14:33:06Z",
"entry_id":1481,"field1":"150,34,18","field2":"0","field3":"0"}]}

the problem is still the same.................... the thingspeak field1 and field2 are field with all the data [sensorValue1,sensorValue2,sensorValue3] as a string
and there is no data in field3.

I dont know how to split the string in the corresponding fields, and from my google searching there is no profound solution.
Any ideas how to solve it?
Does anoyne test a similar experiment with UDOO NEO to upload 2 different sensor field data in Thingspeak?

 

and i have printed the params
some of the results are

field2=150%2C35%2C19&field3=0&field1=150%2C32%2C19&key=J***********

field2=150%2C33%2C18&field3=0&field1=150%2C30%2C19&key=J*************

field2=0&field3=0&field1=150%2C29%2C18&key=J***********

field2=150%2C34%2C18&field3=0&field1=150%2C28%2C18&key=J**********

 

If you use Serial.println() in the Arduino sketch to send data to the /dev/ttyMCC you are receiving a string with python ReadArduino(sensorValuexxx).
How do you write the data to Serial? I think you do all values in one line like Serial.println(sensorValue1,sensorValue2,sensorValue3);

Then you have to split it into different values in Python:

Code:

sensorValues = ReadArduino(sensorValues)

sensorValue1,sensorValue2,sensorValue3 = sensorValues.split(",")

params = urllib.urlencode({'field1': sensorValue1, 'field2': sensorValue2,'field3': sensorValue3,'key':key })

perhaps you have to convert the string Sensorvaluexxx into a float or integer:

 

thanks again for your feedback.
This was exactly the solution and i have discovered it 3 hours ago.
My worked code is the following:

def writesensordata():
global temp1, sensorValue1,value1, value2, value3
while True:
sensorValue1 = ReadArduino(sensorValue1)
if sensorValue1 is None:
print "No serial Data"
else:
temp1 = sensorValue1.split(',')
value1=temp1[0]
value2=temp1[1]
value3=temp1[2]
params = urllib.urlencode({'field1': value1, 'field2': value2,'field3': value3,'key':key })
#params = urllib.urlencode({'field1': value1, 'key':key })
headers = {"Content-typZZe": "application/x-www-form-urlencoded","Accept": "text/plain"}
conn = httplib.HTTPConnection("api.thingspeak.com:80")
try:
conn.request("POST", "/update", params, headers)
response = conn.getresponse()
print value1
print value2
print value3
print response.status, response.reason
data = response.read()
conn.close()
except:
print "connection failed"
break
#sleep for desired amount of time
if __name__ == "__main__":
while True:
writesensordata()
time.sleep(sleep)

 

Good! For documentation purposes: Can you share the Arduino serial.println code lines in which you created the combined sensor output?

 

Surely!!! Thanks again for your feedback!

Serial.print(sensorValue1);
Serial.print(",");
Serial.print(sensorValue2);
Serial.print(",");
Serial.print(sensorValue3);
Serial.println();

 

Thanks, I made an update of the first post referring to your solution.