Published May 7, 2020 © GPL3+

Temperature Alert via telegram

Using LED and Telegram, to get alerts if temperature increases more than given threshold

BeginnerFull instructions provided2 hours724

Things used in this project

Hardware components

Bolt IoT Bolt WiFi Module

Breadboard (generic)

Male/Female Jumper Wires

LED (generic)

Temperature Sensor

USB-A to Micro-USB Cable

Software apps and online services

Bolt IoT Bolt Cloud

Story

During this pandemic as all are restricted to homes. And some warehouses which which need to store their products in certain range of temperatures like restaurant storage, pharmaceuticals and These Warehouses need to be monitored continuously at regular intervals. As this process may be a bit difficult during these pandemic times, I came up with this basic idea that alerts the owners by sending bot message via telegram. If at all in some rare cases when the message is not seen, the sensor also alerts the people nearby by glowing emergency.So, that anyone could take action.

Creating Telegram Bot :

1. Go to Play store and install new version of telegram application and sign in.

2. After signing in, go on the main chat screen and swife left.

3. Then click on "New Channel".

4. Type your channel name and put up a display picture if you want to. And add suitable description to the channel, something like "Temperature alerts".

5. Keep the channel as public for further uses. and Below a permanent link has to be given after t.me/xxxxxx, you can give your suitable name.

6. In main chats screen search for BotFather and then do /start -> /newbot -> Give a name to bot -> give username for bot.(Save the channel token given)

7. Open the chat of the channel you created and in the info make the bot as on the administrators and give power to send messages.

Connections of LM35 sensor on the Breadboard:

1. Connect VCC pin of the LM35 to 5v of the Bolt Wifi module.

2.Output pin of the LM35 connects to A0 (Analog input pin) of the Bolt Wifi module.

3.Gnd pin of the LM35 connects to the Gnd.

ADDITIONALCONNECTIONSTOTHEBREADBOARD(connectingLED):

1. Connect Positive pin the of the LED to the 0th GPIO pin.

2. Connect Negative pin of the LED to the GND pin.

NOTE:Boththeabovestepsshouldbeconnectedalongwiththeprevioussetup.

The image looks like this:

Connections may look a bit clumsy, but are accurate.

CODE:

The Algorithm for this code can be divided into three parts:

1. Take Values from the Temperature sensor

2. Compare the Values with the Threshold value.

3. If the Values exceeds the threshold value, connect to telegram using bolt cloud and give alerts via telegram bot created and also Turn On LED for the indication.

For this we need to save the information of the details in a separate file for safety purposes.

We need a configuration file with details of

1. Bolt API Key

2.Device_Id:

It will be "BOLTXXXXXXXX" in your devices list.

3.Telegram channel Id

It will be given as token in the BotFather Chat.

4.Telegram Chat Id

check your telegram_chat_id (this will be after t.me/)and it is starting with “@XXXX”.

MAINCODE:

The main code consists of two functions:

1. For Taking sensor value from the LM35, which has only one parameter pin.And returns the sensor value.

2. For Sending Message from telegram. This has only message as a parameter.This contains url

url = "https://api.telegram.org/" + conf.telegram_bot_id + "/sendMessage"

and returns the telegram_data. ie., response from telegram.

And while all these is true :

1. Take the sensor value from the pin("A0").You can covert the sensor value to degrees celsius for much better understanding, it can be done by

temperature = (100*sensor_value)/1024

2. Compare the threshold value with the sensor value. If it exceeds then take another response as digitalWrite funtion for glowing LED. And send alert message to from telegram. Using Configurations file.

For more detailed explanation of code you can visit Telegram Module from the Bolt IOT course.

OUTPUT:

Output on the terminal

LED Glowing when Threshold value exceeds

Bot message send in telegram

Temperature_alert_system

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):
    
    try:
        response = mybolt.analogRead(pin)
        data = json.loads(response)
        if data["success"] != 1:
            print("Request is not successfull")
            print("This was response->", data)
            return -999
        sensor_value = int(data["value"])
        return sensor_value
    except Exception as e:
        print("Error while returning the sensor value")
        print(e)
        return -999


def send_telegram_message(message):
    
    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 URL")
        print(url)
        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:
    # Step 1
    sensor_value = get_sensor_value_from_pin("A0")    
    print("The current sensor value is:", sensor_value)
    
    # Step 2
    if sensor_value == -999:
        print("Request was not unsuccessfull. Skipping the step.")
        time.sleep(10)
        continue
    
    # Step 3
    if sensor_value >= conf.threshold:
        print("Sensor value has exceeded threshold")
        print ("Turning On LED")
        response2 = mybolt.digitalWrite('0','HIGH')
        print (response2)
        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)

    # Step 4
    time.sleep(10)
    print ("Turning Off LED")
    response3 = mybolt.digitalWrite('0','LOW')
    print (response3)

Credits

shoaib aslam shaik

1 project • 0 followers

Temperature Alert via telegram

Things used in this project

Hardware components

Software apps and online services

Story

Creating Telegram Bot :

Connections of LM35 sensor on the Breadboard:

Code

Temperature_alert_system

Credits

shoaib aslam shaik

Comments

Embed the widget on your own site

Temperature Alert via telegram

Temperature Alert via telegram

Things used in this project

Hardware components

Software apps and online services

Story

Creating Telegram Bot :

Connections of LM35 sensor on the Breadboard:

Code

Temperature_alert_system

Credits

shoaib aslam shaik

Comments

Related channels and tags