Smoke Detectors are very useful in detecting smoke or fire in buildings, and so are the important safety parameters. It sensible to to flammable gas: Alcohol, and Methane etc. The voltage that the sensor outputs change according to the smoke/gas level that exists in the atmosphere. The sensor outputs a voltage that is proportional to the concentration of smoke/gas. In other words, the relationship between voltage and gas concentration is as following:
- The greater the gas concentration, the greater the output voltage
- The lower the gas concentration, the lower the output voltage
In this DIY Lesson, we’ll learn how to monitor the smoke detector from remote APP
- OSOYOO Basic board x 1
- OSOYOO ESP8266 WIFI Shield x 1
- Gas sensor module x 1
- USB cable x 1
- Jumper wires several
First, please insert the ESP8266 wifi Shield into your mainboard, 
Make sure jumper cap connected E_TX to D4 and E_RX to D5.
Connect the Gas detector sensor with mainboard as following diagram:
| OSOYOO Basic Board |
Gas detector sensor |
| A0 |
AO |
| GND |
GND |
| 5V |
VCC |
Software Installation:
Step A) Install latest IDE from https://www.arduino.cc/en/Main/Software?setlang=en. If you have IDE version after 1.1.16, please skip this step).
Step B) Connect the OSOYOO Basic board to computer via USB cable,
Step C) Open the IDE and choose corresponding board type and port type for you project.
- Board:”Arduino/Genuino UNO”
- Port: Choose your own Serial Port for your mainboard
Step D)Download the sketch file fromhttps://osoyoo.com/driver/wifi-iot/lesson8/wifi-lesson8.zip
unzip the file and double click the wifi-lesson8.ino file, find following lines:
char ssid[] = "******"; // your network SSID (name)
char pass[] = "******"; // your network password
please replace the ****** with your correct wifi SSID and password, otherwise your project can
not connect to Internet.
Step E) After change above lines, load the sketch into IDE.
STEP A)Open your Serial Monitor, you can see your router will assign an IP address to your IDE as
following:
In above example, 192.168.1.81 is the IP address of my IDE, we need to set this IP address in our APP in next step.
Step B) Open your OSOYOO IOT UDP Robot APP , If you haven’t installed this APP, please read APP installation section in Lesson 2
Step C)Make sure your Cell phone is in the same Local Network of Arduino. Open the APP, click Settings, enter your Arduino IP address from Step F and Port to 8888 in settings:
