Code for Gas booking python

Create a file called config.txt  and add following lines

phonenum: 9666261963
min_weight: 3
gas_agency: 9985203976


smartgasbooking.py

import serial
from random import randint
from time import sleep
from threading import Thread
import threading

resume=threading.Event()
 

def read_configfile():
    fin = open("config.txt","r")
    lines= tuple(fin)
    config = {}
    for line in lines:
       config[line.split(":")[0]]=line.split(":")[1]  
       fin.close()
    return config

config_arr=read_configfile()
   
def weight_read():
    global config_arr
    global resume
    while True :
     try:
        ser=serial.Serial('/dev/ttyAMA0',9600,timeout=1)  
        ser.flush()
        num=ser.inWaiting()
        if(num != 0):
            s=ser.read(num)
            print "weight",s
            weight= s.split(" Kg.")[0]
   #print weight
            if(float(weight) < 4):
                resume.clear()
                #call_number(config_arr["phonenum"])
                call_number("9666261963")                            
                print "calling"          
        ser.close()
     except:
        print "...."

def call_number(phnum):
   try:
    global resume
    ser = serial.Serial('/dev/ttyUSB0',9600,timeout=1)
    ser.flush()
    print "Calling ...",phnum
    cmd="ATD"+str(phnum)+";\r"
    ser.write(cmd)
    sleep(15)
    ser.write('ATH\r')
    ser.close()
   except:
    print "call_error"  
   resume.set()
 




try:
    resume.set()  
    wt_thread=Thread(target = weight_read);
    wt_thread.start()
    wt_thread.join()  
except:
    print " thread Error"
   

   

Interfacing Load cell with Raspberry Pi

Connectivity of  Load cell  to Load cell Amplifier for weighing scale

Input voltage - Excitation
Red wire  --------- Excitation input voltage (+)
Black wire -------- Excitation input Ground(-)

Output voltage - Signal
Green wire ------- Signal output (+)
White  wire ------ Signal output (-)
 
Load cell documentation :                   http://www.sunrom.com/p/load-cell-40-kg
Load cell  Amplifier documentation  : http://www.sunrom.com/p/load-cell-amplifier-for-weighing-scale-serial-output

Connectivity of Load cell Amplifier for weighing scale  to Raspberry Pi
 5V    ---------- pin 4 (5v)
GND  --------- pin 6 (GND)
 RXD --------- pin 8 (TXD)
 TXD --------- pin 10 (RXD)

Python code for weight reading

import serial
from random import randint
from time import sleep
from threading import Thread

def weight_read():
    global config_arr
    while True :
     try:
        ser=serial.Serial('/dev/ttyAMA0',9600,timeout=1)   
        ser.flush()
        num=ser.inWaiting()
        if(num != 0):
            s=ser.read(num)
            print s
            weight= s.split(" Kg.")[0]
        #print weight
            if(float(weight) < 4):
                #call_number(config_arr["phonenum"])
                print "calling"           
        ser.close()
     except:
        print "Weight read error"

try:
    wt_thread=Thread(target = weight_read);
    wt_thread.start()
    wt_thread.join()  
except:
    print " thread creation Error"






     

Interfacing SIM900A GSM Modem with Raspberry Pi

Interfacing SIM900A GSM Modem with Raspberry Pi

gsm_phone.py

import serial

import time

ser = serial.Serial('/dev/ttyUSB0',9600,timeout=1)

# 9600 is the default Baudrate for SIM900A modem

ser.flush()

ser.write('ATD9020XXXXXX;\r')

# AT command to call a number using GSM Modem

#ser.read(2)

# read 2 bytes of data from the serial port

time.sleep(10)

# wait for 10 seconds

ser.write('ATH\r')

# Hold the call

ser.close()

# close the serial port

connect RXD of USB2Serial to TXD of GSM Modem and TXD of Serial to RXD of GSM Modem. Also check if you can make a call to the modem and see whether a ring sound, so that network connection can be ensured.

You may use AT+CMGS=”phonenumber” for the sms

Understanding pin configuration of Raspbery pi 2 Model B

Setting of ssh,rdp

As we don’t have a LCD monitor for connecting our pi board , so we decided to setup ssh , RDP.

As there are chances of ip changes so we have assigned a static ip for pi.

Static ip creation Steps :

1. Open terminal and type sudo nano etc/network/interface
2. change dhcp to static and enter following:

address:inet

netmask:mask

network:destination address

broadcast:bcast address

SSH :

1. Use of putty in windows
2. use of remmina in Linux

RDP :

1. Use of Remote Desktop connection in windows
2. Use remmina in Linux

Raspbian pi os installation

1)Downloaded image file of OS  link

2) Make the bootable copy of OS on MicroSD card.

3) setting of username , password

Components used

1. MQ6 LPG Gas Sensor  Rs 268 
2. Mechanical platform with Load cell RS 1995
3. Sim 900 gsm module and usb2 to serial RS232  Rs 1498
4. Rasbery Pi Rs 3299    
5. MicroSD Memory Card Rs 372
6. Comfast wireless adapter Rs 299
7. Ptron Hdmi cable Rs 195
8. 6 in 1 electric soldering kit  Rs 285
9. Digital multimeter Rs 164.34

Intro to our project - Smart Gas Booking and leakage detection

Our awesome Team : 

Team lead :

127137 - M Devendra Kumar Dora (CSE)

Other members

124218 - Dobbali Sai Vamshi (ECE)

127254 - Sanjay Kumar Singh (CSE)

124241 - Padakanti Sai Prasad(ECE)

124222 - Gandra Anup Kumar (ECE)

Introduction and background of the problem

 In present days, the life of the people has become very busy. In day to day life everything is automated then why not the gas cylinder booking automated ? Moreover, most of the people stand in long queues for booking the gas cylinders.. Can’t this be avoided ? Because of the versatile nature of LPG it is used for many needs such as domestic fuel, industrial fuel, automobile fuel, heating, illumination etc and the demand for LPG is on an exponential rise day by day. Natural gas is another widely used fuel in homes. Both burn to produce clean energy, however there is a serious threat about their leakage. The gases being heavier than air do not disperse easily and may lead to suffocation when inhaled; also the leaked gases when ignited may lead to explosion. The number of deaths due to the explosion of gas cylinders has been increasing in recent years. There is  a need for a system to detect and also prevent leakage of LPG.

So, our main objectives to address the above cited problems are

• Keep track of gas usage and its level in cylinder that helps in automatic booking of gas cylinder.
• Avoiding long queues while booking of a gas cylinder
• Toxic gas detecting and alerting system.