Temperature Alert using bolt module

This project can be used in various places where you need to maintain the temperature below a specific value.

IntermediateShowcase (no instructions)1 hour466

Things used in this project

Hardware components

Bolt IoT Bolt WiFi Module

Buzzer

Temperature Sensor

Story

Go to the Playstore or App Store on your phone and search for Telegram.
Download and Install the latest version of Telegram app.
Signup for a new account or sign in to Telegram by providing your mobile number.
Telegram will call you OR send you a SMS to verify your mobile number.
Get your account verified and approve any permissions if required.
You will be logged in to Telegram and will be shown a screen similar to the one below. (It's okay if it differs from the screenshot below)

Create a new Bot

Telegram allows us to create a new bot with the help of a bot called as "BotFather". It is a single bot to create and manage other bots.

On the Home screen of the app, click on the search icon on the top right and type in "botfather".

In the search results, click on the correct result for "BotFather" as shown below. The correct "BotFather" will have a blue tick mark next to its name. This will take you to a chat window with the "BotFather".

The chat will have a few items already and will display you a list of commands to get started.

Since we need to create a new Bot, go ahead and type in "/newbot" in the window.
It will ask you to type in few more details like Bot name and Bot username.
When your bot is created successfully, you will be shown a screen similar to the one below and will contain the Bot Token. This token is used to control your Bot as well as send messages on behalf of it. Please keep this token secure as it will allow anyone to access your Bot.

In the screenshot above, the Bot token is "894346529:AAhuJ2XJQy5dlEtLYF0sc0Z_qu0fSqihSSc". Please save it as telegram_bot_id. The telegram_bot_id is saved as "bot" followed by the bot token. So, in this example, the telegram_bot_id will be "bot894346529:AAhuJ2XJQy5dlEtLYF0sc0Z_qu0fSqihSSc".
The telegram_bot_id will be used in the python code to send messages. The python code will be taught in the later lessons.
Also, please be careful when saving the Bot ID. You may get confused between 0 and O, I and 1 etc. as they are similar looking.
Congratulations, you have created a new Bot. Now, we will need to add it to the channel we have created previously so that we can send alerts.

Add the bot to channel

From the App home screen, open the channel we have created earlier.
In the screen, click on the channel name on the top to open the information for the Channel.

Click on the Administrators button so that we can add the newly created bot to the channel.

Search for the bot that we have created using the Bot's username. Once you have found the correct Bot click on it to add it to the channel. Please make sure you have clicked on the Administrators button in the previous step as this will allow our bot to post to the channel.

You will be asked to confirm the rights for the bot. Press on the tick mark on the top right to continue adding the bot to the channel. Make sure that the bot has the rights to "Post Messages".

You will now see the newly created Bot in the list of administrators for the channel.

Now we will code for sending messages to the channel via the Bot.

Code

Telegram_alert

#This is the conf.py code used in the main code written below
BOLT_API_KEY = "Enter your bolt api key here"             
DEVICE_ID = "Enter the device id from your bolt cloud"                  
telegram_chat_id = "@XXXX"        
telegram_bot_id = "botXXXX"          
threshold = 250                 






#Create another python file telegram_alert to write the main code here

import requests         
import json                   
import time                   

from boltiot import Bolt        
import conf                   

mybolt = Bolt(conf.BOLT_API_KEY, conf.DEVICE_ID)

def get_sensor_value_from_pin(pin):
    """Returns the sensor value. Returns -999 if request fails"""
    try:
        response = mybolt.analogRead(pin)
        data = json.loads(response)
        if data["success"] != 1:
            print("Request not successfull")
            print("This is the response->", data)
            return -999
        sensor_value = int(data["value"])
        return sensor_value
    except Exception as e:
        print("Something went wrong when returning the sensor value")
        print(e)
        return -999


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(
            "GET",
            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:
  
    sensor_value = get_sensor_value_from_pin("A0")    
    print("The current sensor value is:", sensor_value)
    
    
    if sensor_value == -999:
        print("Request was unsuccessfull. Skipping.")
        time.sleep(10)
        continue
    
  
    if sensor_value >= conf.threshold:
        print("Sensor value has exceeded threshold")
        response = mybolt.digitalWrite('0','HIGH')
        message = "Alert! Sensor value has exceeded " + str(conf.threshold) + \
                  ". The current value is " + str(sensor_value)
        telegram_status = send_telegram_message(message)
        print("This is the Telegram status:", telegram_status)
        response = digitalWrite('0','LOW')

  
    time.sleep(10)

Credits

Akash Auti

2 projects • 1 follower

Temperature Alert using bolt module