Learn, Make and Invent
  • Educational STEM Products
  • Early Primary
    • Bee Bot
    • Ozobot
    • Matatalab Coding Set
    • Neuron coding blocks
    • Osmo ios
    • Cubetto
    • Sphero Bolt
  • Primary
    • Codey Rocky AI Robot
      • Tutorials
        • Introduction
        • Get Started
        • Upload Mode
        • Emotion Blocks
        • IoT Blocks
        • Neuron Blocks
        • IR Remote
        • Use Python
      • Examples
      • Block Reference
        • Looks
        • Lighting
        • Speaker
        • Action
        • Sensing
        • Infrared
        • Events
        • Control
        • Operators
      • Python API Reference
        • Python API for Codey
        • Python API for Rocky
        • Python API for Third-Party Libraries
        • Python API for Neuron Extension Modules
      • FAQs
    • Edison
    • mBot
      • Introduction
      • Building mBot
      • Connect mBot
      • Preset Modes
    • Microbit
    • Merge Cube
    • Bare Conductive Board
    • Tello Edu
  • Secondary
    • Microbit Grove Inventor Kit
    • mBot Ranger
    • Arduino Science Kit
    • Arduino Starter Kit
    • Arduino Grove Starter Kit
    • CoDrone
  • Senior Secondary
    • CoDrone Pro
    • Arduino CTC Go
  • Digital Tech Kits
    • Digital Tech Kit for K-2
    • Digital Tech Kit for 3-5
    • Digital Tech Kit for 6-8
    • Digital Tech Kit for 9-10
  • Makerspace
    • Otto DIY
      • User guide
      • Assembly Instructions
        • Builder Kit
        • Builder Kit +
        • Builder Kit Humanoid
        • Builder Kit E
      • OTTO enclosures 3D and laser cut files
      • Code
    • Curcuitmess
      • Circuitmess Ringo
        • Inside the Box
        • Tools Needed
        • Soldering the parts
        • Assembling the parts
        • Set up your Ringo
  • Grove Ecosystem
    • Grove System
    • Grove Modules
      • Actuators
        • Atom Node
        • Grove 2 Coil Latching Relay
        • Grove Button
        • Grove Buzzer
        • Grove Dry Reed Relay
        • Grove EL Driver
        • Grove Haptic Motor
        • Grove I2C Motor Driver V1.2
        • Grove I2C Motor Driver V1.3
        • Grove I2C Motor Driver
        • Grove LED Matrix Driver v1.0
        • Grove Mini Fan
        • Grove Mini I2C Motor Driver v1.0
        • Grove MP3 v2.0
        • Grove Recorder v3.0
        • Grove Relay
        • Grove Serial MP3 Player
        • Grove Servo
        • Grove Solid State Relay
        • Grove Speaker
        • Grove Variable Color LED
        • Grove Vibration Motor
        • Grove Water Atomization
      • Display
        • Grove 4 Digit Display
        • Grove Circular LED
        • Grove LCD RGB Backlight
        • Grove LED Bar
        • Grove LED Socket Kit
        • Grove LED String Light
        • Grove LED Strip Driver
        • Grove OLED Display 0.96inch
        • Grove OLED Display 1.12inch
        • Grove Red LED
        • I2C LCD
      • Sensors
        • Grove 3 Axis Analog Accelerometer
        • Grove 3 Axis Compass V1.0
        • Grove 3 Axis Digital Accelerometer 1.5g
        • Grove 3 Axis Digital Accelerometer 16g
        • Grove 3 Axis Digital Accelerometer 400g
        • Grove 3 Axis Digital Gyro
        • Grove 6 Axis Accelerometer And Compass V2.0
        • Grove 6 Axis Accelerometer And Gyroscope
        • Grove 80cm Infrared Proximity Sensor
        • Grove Air Quality Sensor v1.3
        • Grove Alcohol Sensor
        • Grove Barometer Sensor BME280
        • Grove Barometer Sensor BMP180
        • Grove Barometer Sensor BMP280
        • Grove Barometer Sensor
        • Grove Barometer High Accuracy
        • Grove Chest Strap Heart Rate Sensor
        • Grove CO2 Sensor
        • Grove Collision Sensor
        • Grove Digital Infrared Temperature Sensor
        • Grove Digital Light Sensor
        • Grove Dust Sensor
        • Grove Ear clip Heart Rate Sensor
        • Grove Electricity Sensor
        • Grove Finger clip Heart Rate Sensor with shell
        • Grove Finger clip Heart Rate Sensor
        • Grove Fingerprint Sensor
        • Grove Gas Sensor O2
        • Grove Gas Sensor
        • Grove HCHO Sensor
        • Grove High Temperature Sensor
        • Grove IMU 10DOF v2.0
        • Grove Infrared Receiver
        • Grove Line Finder
        • Grove Temperature and Humidity Sensor Pro
        • Grove Temperature And Humidity Sensor
        • Grove Voltage Divider
        • Grove Water Sensor
        • Grove XBee Carrier
      • Communication
        • Grove High Precision RTC
        • Grove LoRa Radio
        • Grove NFC Tag
        • Grove NFC
        • Grove 125KHz RFID Reader
        • Grove 315MHz RF Kit
        • Grove 433MHz Simple RF Link Kit
        • Grove Bee Socket
        • Grove BLE v1
        • Grove BLE dual model v1.0
        • Grove DMX512
        • Grove GPS
        • Grove I2C ADC
        • Grove I2C FM Receiver
        • Grove Protoshield
        • Grove RJ45 Adapter
        • Grove Screw Terminal
        • Grove Serial Bluetooth v3.0
        • Grove Serial RF Pro
        • Grove UART Wifi
      • Others
        • Grove Base Booster Pack
        • Grove Base Cape for BeagleBone v2
        • Grove Base HAT
        • Grove Base Shield for NodeMCU V1.0
        • Grove Base Shield for Photon
        • Grove Breakout for LinkIt Smart 7688 Duo
        • Grove Cape for BeagleBone Series
        • Grove Indoor Environment Kit for Edison
        • Grove Inventor Kit for microbit
        • Grove IoT Developer Kit Microsoft Azure Edition
        • Grove IoT Starter Kits Powered by AWS
        • Grove Recorder
        • Grove Shield for Intel Joule
        • Grove Smart Plant Care Kit
        • Grove Speech Recognizer Kit for Arduino
        • Grove Starter Kit for BeagleBone Green
        • Grove Starter Kit for IoT based on Raspberry Pi
        • Grove Starter kit for LinkIt Smart7688 Duo
        • Grove Starter Kit v3
        • Grove AND
        • Grove Base Shield for IOIO OTG
        • Grove BlinkM
        • Grove DC Jack Power
        • Grove Differential Amplifier v1.0
        • Grove Differential Amplifier v1.2
        • Grove GSR Sensor
        • Grove I2C Hub
        • Grove Joint v2.0
        • Grove Mega Shield
        • Grove Mini Camera
        • Grove Mixer Pack V2
        • Grove MOSFET
        • Grove Node
        • Grove NOT
        • Grove NunChuck
        • Grove OR
        • Grove PS 2 Adapter
        • Grove Recorder v2.0
        • Grove Serial Bluetooth
        • Grove Serial LCD V1.0
        • Grove Single Axis Analog Gyro
        • Grove SPDT Relay 30A
        • Grove Starter Kit for LinkIt ONE
        • Grove Starter Kit for mbed
        • Grove Toy Kit
        • Grove Wrapper
        • GrovePi Plus
  • Arduino
    • Graphical coding with Grove sensors
    • Arduino Comparison Sheet
    • Tutorials
      • Setup Arduino Every board in Arduino IDE
      • Arduino Cloud
      • Installing Libraries
      • Motor, Servo for Arduino
      • Sensor for Arduino
    • Examples
      • Genuino 101
        • Prerequisites
        • Shock / Tap Detection
        • LED Control Over Bluetooth
        • Board Orientation Detection
        • Pedometer – Step Counting Over Bluetooth
        • Timer Switch
        • Appendices
          • Appendix A
          • Appendix B
  • micro:bit
    • Examples
      • Servo with micro:bit
  • Halocode
    • Introduction
    • Get Started
    • Upload Mode
    • Speech Recognition
    • User Cloud Message
    • Use Python with HaloCode
    • Code with Mu A Simple Python Editor
      • Examples
        • Basic Project
          • Color Mixer
          • Compare Strength
          • Connect Wi-Fi
          • Control Multiple HaloCodes via LAN
          • Energy Ring
          • Make a Smiling Face with the LED Ring
          • Make a Volume Detector
          • Press the Button to play LED Animation Meteor
          • Rainbow Button
        • Level Up
          • Control HaloCode's LEDs via Voice Command
          • Remote Control
          • Make HaloCode the Steering Wheel of the Car on Stage
          • HaloCode's Remote Control Deck
          • Emotion Detector
          • Deep Learning and Facial Recognition
          • Use Global Variable to Interact with Sprites
        • Workshop
          • A Kitten with Blinking Eyes and a Waving Tail
          • Pedometer
          • Smart Home
  • Troubleshooting
    • Matatalab
      • Matatalab Upgrade
        • Pre Upgrade Instructions - MatataBot
        • MatataBot Upgrade
        • Matata Tower Upgrade
        • Resources for Upgrade
      • Matatalab Pairing
Powered by GitBook
On this page
  • Features
  • Platforms Supported
  • Usage
  • Hardware Installation
  • Download Code and Upload
  • Resources

Was this helpful?

  1. Grove Ecosystem
  2. Grove Modules
  3. Sensors

Grove Alcohol Sensor

PreviousGrove Air Quality Sensor v1.3NextGrove Barometer Sensor BME280

Last updated 5 years ago

Was this helpful?

Grove - Alcohol Sensor is a complete alcohol sensor module for Arduino or Seeeduino. It is built with semiconductor alcohol sensor. It has good sensitivity and fast response to alcohol. It is suitable for making Breathalyzer. This Grove implements all the necessary circuitry for MQ303A like power conditioning and heater power supply. This sensor outputs a voltage inversely proportional to the alcohol concentration in air.

Note The sensor value only reflects the approximated trend of gas concentration in a permissible error range, it DOES NOT represent the exact gas concentration. The detection of certain components in the air usually requires a more precise and costly instrument, which cannot be done with a single gas sensor. If your project is aimed at obtaining the gas concentration at a very precise level, then we do not recommend this gas sensor.

Features

  • Input Voltage: 5V

  • Working Current: 120mA

  • Detectable Concentration: 20-1000ppm

  • Grove Compatible connector

  • Highly sensitive to alcohol.

  • Fast response and resumes quickly after alcohol exposure.

  • Long life.

  • Compact form factor.

Platforms Supported

Usage

Hardware Installation

Arduino UNO

Alcohol Sensor

5V

VCC

GND

GND

Analog A1

SCL

Analog A0

DAT

You can gain the present voltage through the DAT pin of sensor. Please note the best preheat time of the sensor is above 48 hours. For the detailed information about the Alcohol sensor please refer to the datasheet.

Download Code and Upload

There are two steps you need to do before getting the concentration of gas.

First, connect the module with Grove Shield using A0 like the picture above. And put the sensor in a clear air and use the program below.

#define heaterSelPin 15

void setup() {
    Serial.begin(9600);
    pinMode(heaterSelPin,OUTPUT);   // set the heaterSelPin as digital output.
    digitalWrite(heaterSelPin,LOW); // Start to heat the sensor
}

void loop() {
    float sensor_volt;
    float RS_air; //  Get the value of RS via in a clear air
    float sensorValue;

/*--- Get a average data by testing 100 times ---*/
    for(int x = 0 ; x < 100 ; x++)
    {
        sensorValue = sensorValue + analogRead(A0);
    }
    sensorValue = sensorValue/100.0;
/*-----------------------------------------------*/

    sensor_volt = sensorValue/1024*5.0;
    RS_air = sensor_volt/(5.0-sensor_volt); // omit *R16
    Serial.print("sensor_volt = ");
    Serial.print(sensor_volt);
    Serial.println("V");
    Serial.print("RS_air = ");
    Serial.println(RS_air);
    delay(1000);
}

Then, open the monitor of Arduino IDE, you can see some data are printed, write down the value of RS_air and you need to use it in the following program. During this step, you may pay a while time to test the value of RS_air.

#define heaterSelPin 15

void setup() {
    Serial.begin(9600);
    pinMode(heaterSelPin,OUTPUT);   // set the heaterSelPin as digital output.
    digitalWrite(heaterSelPin,LOW); // Start to heat the sensor
}

void loop() {

    float sensor_volt;
    float RS_gas; // Get value of RS in a GAS
    float ratio; // Get ratio RS_GAS/RS_air
    int sensorValue = analogRead(A0);
    sensor_volt=(float)sensorValue/1024*5.0;
    RS_gas = sensor_volt/5.0-sensor_volt; // omit *R16

  /*-Replace the name "R0" with the value of R0 in the demo of First Test -*/
    ratio = RS_gas/RS_air;  // ratio = RS/R0
  /*-----------------------------------------------------------------------*/

    Serial.print("sensor_volt = ");
    Serial.println(sensor_volt);
    Serial.print("RS_ratio = ");
    Serial.println(RS_gas);
    Serial.print("Rs/R0 = ");
    Serial.println(ratio);

    Serial.print("\n\n");
    delay(1000);
}

Now, we can get the concentration of gas from the figure below.

According to the figure, we can see that the minimum concentration we can test is 20ppm and the maximum is 10000ppm, in a other word, we can get a concentration of gas between 0.002% and 1%. However, we can't provide a formula because the relation between ratio and concentration is nonlinear.

Notes

a. The value varies between 500 - 905. Hence any value above 650 indicates alcohol vapor in the vicinity.

b. Once exposed to alcohol vapor, it takes some time for the sensor value to decrease completely.

c. Yet, any new exposure will show instant increase in sensor value.

Caution

a. Alcohol sensor is very sensitive semiconductor device. Handle with care.

b. Do not expose to organic silicon steam, alkali or corrosive gases.

c. Do not use freeze or spill water.

d. Maintain proper working voltage.

Resources

!!!Tip More details about Grove modules please refer to

Grove products have a eco system and all have a same connector which can plug onto the . Connect this module to the A0 port of Base Shield, however, you can also connect Gas sensor to Arduino without Base Shield by jumper wires.

Grove System
Grove Base Shield
Grove-Alcohol Sensor Eagle File
Grove-Alcohol Sensor v1.2 Eagle File
Schematics in PDF Format
How to Choose A Gas Sensor
MQ303A
MQ303A