Brainy LED

1. INTRODUCTION

BrainyLED is a proximity enabled diode where a HC-SR04 sensor is connected with the arduino to provide a trigger if an object is detected in the sensor's vicinity. This trigger is set in such a way that the user can obtain an accurate read.

Therefore, a Threshold value is defined by the user so that whenever the sensor value is less that threshold it provides a trigger which is used to switch on the LED.

An alert system is setup using BOLT cloud to provide a telegram message whenever the LED switches ON and sends a message "ObjectDetectedInProximity!".

2. DEMONSTRATION

3. SCHEMATICS

Configuration file (Conf.py)

This file contains all the details about the Api's and other necessary values to provide a successful connection.

"""Configurations"""  
bolt_api_key = "<Api_key>"     # This is your Bolt Cloud API Key  
device_id = "BOLTXX"           # This is the device ID  
telegram_chat_id = "@XXXX"   # This is the channel ID of the created Telegram channel.  
telegram_bot_id = "botXXXXX"       # This is the bot ID of the created Telegram Bot.  

Python File (proximity.py)

Contains the BOLT IoT code for establishing a connection with arduino using serial input.

import requests  
import conf  
from boltiot import Bolt  
import json, time  
mybolt = Bolt(conf.bolt_api_key, conf.device_id) #Create object to fetch data  
response = mybolt.serialRead('10')  
print (response)  
def send_telegram_message(message):  
   """Sends message via Telegram"""  
   url = "https://api.telegram.org/" + conf.telegram_bot_id + "/sendMessage"  
   data = {  
       "chat_id": conf.telegram_chat_id,  
       "text": message  
   }  
   try:  
       response = requests.request(  
           "POST",  
           url,  
           params=data  
       )  
       print("This is the Telegram response")  
       print(response.text)  
       telegram_data = json.loads(response.text)  
       return telegram_data["ok"]  
   except Exception as e:  
       print("An error occurred in sending the alert message via Telegram")  
       print(e)  
       return False  
while True:  
   response = mybolt.serialRead('10')  #Fetching the value from Arduino  
   data = json.loads(response)  
   status_value = data['value'].rstrip()  
   if str(status_value) == 'HIGH':  
       print ("Status is", status_value)  
       message = "Object detected in proximity!"  
       telegram_status = send_telegram_message(message)  
   else:  
        print ("Status is LOW!",status_value)  
   time.sleep(10)  

Arduino Code

Arduino code provided for smart LED with ultrasonic sensor.

#include <Ultrasonic.h>  
Ultrasonic ultrasonic(5, 6);  
int LED = 2;  
int threshold = 100;  
void setup() {  
 // put your setup code here, to run once:  
 Serial.begin(9600);  
 pinMode(LED, OUTPUT);  
}  
void loop() {  
 // put your main code here, to run repeatedly:  
 int distance = ultrasonic.distanceRead();  
 if(distance< threshold)  
 {  
 digitalWrite(LED, HIGH);  
 Serial.println("HIGH");  
 delay(10000);  
 }  
 else{  
 digitalWrite(LED,LOW);  
 }  
 delay(1000);  
}