Скачать или смотреть 👉🏾 Wifi Smoke Detector using Esp8266 | SMS Notification | DIY Internet of Things projects (2020)

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This video is about esp8266 smoke detector but also try to cover the following subject:
-wifi smoke detector esp8266
-esp8266 based smoke detector
-esp8266 smoke alarm
-smoke value to thingspeak using esp8266 using tinkercad
-smoke detector using mq2 gas sensor and arduino

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MQ2 gas sensor detects smoke and leakage of combustible gas Methane, Butane, LPG etc. ESP8266 reads the sensor data and push the same to ThingSpeak (IoT analytics platform) using MQTT. If the gas concentration exceeds the preset threshold value (calibrated), ESP8266 triggers the alarm (buzzer) with a flashing red LED. On the other hand, ThingSpeak "React"s and initiates the action "ThingHTTP" to call Twilio (Cloud communications platform) API to send SMS notification. ThingSpeak also provides option to visualize (barchart, gauge) the data pushed by ESP8266.

MicroPython
WebREPL
MQTT
Twilio - Cloud communications platform
ThingSpeak - IoT analytics platform service
Components:
ESP8266 ESP-12E
Breadboard
3.3v & 5v Breadboard Power Supply
Breadboard Jumper Wires
10k Resistors - 3 and 220 ohms Resistors - 3
Voltage Divider
Piezo Buzzer - 1
MQ2 Gas sensor module - 1
Push Button Switch - 1
1uF Capacitor - 1
What is ThingSpeak?

What is Twilio and How Does the Twilio API Work?

How does Twilio work?

2. Get a free twilio API key
a. Signup for a trial account in twilio.
b. Login and open Console Dashboard

c. Note down ACCOUNT SID and AUTH TOKEN. We'll use this later.
Console Dashboard - ACCOUNT SID - AUTH TOKEN

3. Open ThingSpeak account and setup
a. Signup for ThingSpeak account.

b. Login and goto Channels -- My Channels. Click New Channel.
Channels - My Channels - New Channel

c. Write API Key and Save Channel.
Enter details - Save Channel

d. Open API Keys tab. Note down Write API Key, Read API Keys and Channel ID for future use.
Write API Key - Read API Keys -Channel ID

e. Click Plugins under Apps menu.
Apps - Plugins

f. Click New and choose Google Gauge template.
Google Gauge template

g. Set following javacript variables channel_id, api_key, gauge_name and update options to customize the gauge in JavaScript section.
Google Gauge template

h. Check Private View and Save.

i. To verify, open the below url few times using the Write API Key of your channel and varying the value of field1 https://api.thingspeak.com/update?api...
Channel stats and visualization in Graph & Google Gauge template

j. Click ThingHTTP action under Apps menu. Click New ThingHTTP to create new one.
New ThingHTTP

k. Enter following details and Save ThingHTTP

l. Click React action under Apps menu. Click New React.
New React

m. Enter following details and Save React

Field Value
Condition Type Numeric
Test Frequency On Data Insertion
Condition If channel () field "1 (concentration)" is greater than
Action (ThingHTTP) then perform ThingHTTP "SendTwilioSMS"
Options Run action each time condition is met
Save React

n. Now if we set the field1 value more than the threshold gas concentration and open the rest url (https://api.thingspeak.com/update?api...) in browser, an SMS will be sent to the verified number.

4. Build the Circuit
Connect all the components as shown in the diagram below.
Circuit Diagram:
Note: Input voltages on the ADC pin must be between 0v and 1.0v. (more...)

Use voltage divider (Voltage Divider Calculator), so that ADC input voltage does not exceed the maximum voltage it can withstand.
Circuit Design:

5. Code and setup ESP8266
a. Connect to WebREPL of ESP8266 using Chrome or Firefox browser.

b. Copy and paste the following code to a file named 'smokealarm.py'. Choose the file and "Send to device" using WebREPL.

c. Run following two lines in the REPL prompt.
import smokealarm
smokealarm.activateSmokeAlarm()
d. If everything goes well, gas concentration data will be pushed periodically to the ThingSpeak. We can visualize data using barchart and gauge. If it crosses the preset concentration value, buzzer will start making sounds, red LED will be flashing and SMS will be sent to the mobile.