jasir
Published © Apache-2.0

Sending Temperature Sensor Data to Azure DB

This project uses a Raspberry Pi B+ attached to 2 temperature sensors and sends data to an Azure data source.

BeginnerFull instructions provided2 hours1,993
Sending Temperature Sensor Data to Azure DB

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Code

read sensor

Python
The Python program prints out the temperature in degrees C every 5 seconds
import os
import glob 
import time 
import thread 
import socket 
from datetime import datetime 

os.system('modprobe w1-gpio') 
os.system('modprobe w1-therm')

base_dir = '/sys/bus/w1/devices/' 
device1_file = glob.glob(base_dir + '28*')[0] + '/w1_slave'
device2_file = glob.glob(base_dir + '28*')[1] + '/w1_slave'

def read_temp_raw(dfile):
    f = open(dfile, 'r')
    lines = f.readlines()
    f.close()
    return lines 

def read_temp(dfile):
    lines = read_temp_raw(dfile)
    while lines[0].strip()[-3:] != 'YES':
        time.sleep(0.2)
        lines = read_temp_raw(dfile)
    equals_pos = lines[1].find('t=')
    if equals_pos != -1:
        temp_string = lines[1][equals_pos+2:]
        temp_c = float(temp_string) / 1000.0
        return temp_c

host = socket.gethostname() 
while True:
    try:
	temp1 = read_temp(device1_file)
	temp2 = read_temp(device2_file)
        body = '{ \"DeviceId\": \"' + host + '\" '        
	now = datetime.now()
	body += ', \"rowid\": ' + now.strftime('%Y%m%d%H%M%S')
        body += ', \"Time\": \"' + now.strftime('%Y/%m/%d %H:%M:%S') + '\"'
	body += ', \"Temp1\":' + str(temp1) 
        body += ', \"Temp2\":' + str(temp2) + '}'
	print body
        
        time.sleep(5)
    except Exception as e:
        print "Exception - ", repr(e)

step4 code

SQL
Using SQL Server Management Studio, or some other database management tool to connect to the database and create a table. You can use the following script:
CREATE TABLE [dbo].[SensorDemo1](	
	[rowid] [int] NOT NULL,
	[DeviceId] [nchar](30) NULL,
	[Time] [datetime] NULL,
	[Temp1] [float] NULL,
	[Temp2] [float] NULL,
PRIMARY KEY CLUSTERED 
(
	[rowid] ASC
)WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON)
)

GO

step 6

ABAP
Install the Azure API and other prerequisite libraries by executing the following commands within a terminal window on your Pi.
$ sudo apt-get install gcc cmake uuid-dev libssl-dev
$ wget sourceware.org:/pub/libffi/libffi-3.2.1.tar.gz
$ tar -zvxf libffi-3.2.1.tar.gz 
$ cd libffi-3.2.1/
$ ./configure
$ sudo make install 
$ sudo ldconfig
$ cd ~
$ sudo apt-get install python-pip
$ sudo pip install requests[security]
$ sudo pip install certifi urllib3[secure] pyopenssl ndg-httpsclient pyasn1 azure
$ sudo apt-get install python-openssl

Credits

jasir

jasir

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