Ultrasonic sensor is connected to the raspberry pi . These sensor values are collected in our mobile in form of messages. This is done using Node Red.
Node-RED is a programming tool for wiring together hardware devices, APIs and online services in new and interesting ways.
It provides a browser-based editor that makes it easy to wire together flows using the wide range of nodes in the palette that can be deployed to its runtime in a single-click.It is build on node.js.
Node Red is defaultly installed in Raspbian Jessie operating system.Type the command node-red-start in the terminal.Once the node red
is started, point a browser at the local host which is provided.
once the Node Red is started in the browser , connect the following nodes shown below
[Twilio] (https://www.twilio.com)is a Cloud communications platform for building SMS, Voice & Messaging applications on an API built for global scale.
Fill all the credentials , token number and the phone number which is provied.
Add the mobile number for which you need to get the message
import RPi.GPIO as GPIO
import time
GPIO.setmode(GPIO.BCM)
TRIG = 23 ECHO = 24
print "Distance Measurement In Progress"
GPIO.setup(TRIG,GPIO.OUT) GPIO.setup(ECHO,GPIO.IN)
GPIO.output(TRIG, False) print "Waiting For Sensor To Settle" time.sleep(2)
GPIO.output(TRIG, True) time.sleep(0.00001) GPIO.output(TRIG, False)
while GPIO.input(ECHO)==0: pulse_start = time.time()
while GPIO.input(ECHO)==1: pulse_end = time.time()
pulse_duration = pulse_end - pulse_start
distance = pulse_duration * 17150
distance = round(distance, 2)
print "Distance:",distance,"cm"
GPIO.cleanup()
In the exec node write the command sudo python followed by path of the code created.
Finally connect all the node and deploy the application.Finally data will be received to your mobile as message.
