Project [in process]

I'm doing a project with my partner Raúl .

[Here I'll be posting whatever we do which is relationed with our project]

We are a group of two students from the IES Pompeu Fabra high school in Martorell and we are interested in doing a research work building a weather station that will send us data related to temperature, humidity, pressure, gases, ... All this will be captured by the different sensors that we want to incorporate into the Raspberry Pi. .....

Materials:

• We will use some sensors:
  • MG811 - CO2

    • MG-811 Carbon Dioxide Sensor Module (Carbon dioxide sensor) is a carbon dioxide sensor (CO2) sensor that is a Metal Oxide Sensor sensor, which must heat the tank to the specified level.(With the method of supplying power) will cause heat vapor and separate CO2 from the air. This sensor module has an MG-811 onboard as the sensor component.A signal output circuit for heating the sensorThe MG-811 is highly sensitive to CO2 and less sensitive to alcohol and CO.The output voltage of the CO2 increases.
    • Useful for greenhouses and medical projects. Sends an analog signal that decreases as the concentration of CO2 increases. This module also includes a digital output pin with TTL output. The Potentiometer on board is used to set the Digital Output Setpoint. After setting the potentiometer threshold, once that threshold is reached, an LED on the sensor will illuminate and the digital pin will give a HIGH voltage signal.
    • Pinout:
      • VCC: 6V ( You can use a4 AA battery holderfor this ).
      • AOUT: Analog Output (voltage decreases as CO2 Levels increase).
      • DOUT: Digital Output that goes HIGH when the threshold is reached (set the threshold by turning the onboard potentiometer).
      • GND: 0V.
    • Features:
      • Wide detecting scope.
      • High sensitivity & stability.
      • Simple drive circuit.
      • Digital output: Active low (When it outputs a low-level signal, the indicator LED will be on)
      • Analog output: Two Range Options: 0 to 2V or 0V to 4V. The default is 0V to 2V DC
      • Compatible with Arduino & Raspberry Pi (for use on analog output with Raspberry Pi you will need an Analog to Digital Converter Chip).

    MG811

    
  • MQ-6 - hydrocarbons (methane, propane...)

    • Application:
      • They are used in gas leakage detecting equipments in family and industry, are suitable for detecting of LPG, iso-butane, propane, LNG, avoid the noise of alcohol and cooking fumes and cigarette smoke.
    • Features:
      • High sensitivity to LPG, iso-butane, propane
      • Small sensitivity to alcohol, smoke
      • Fast response
      • Stable and long life
      • Simple drive circuit

    MQ-6

    
  • DHT11 - temperature and humidity

    • Application:
      • This DFRobot DHT11 Temperature & Humidity Sensor features a temperature & humidity sensor complex with a calibrated digital signal output. By using the exclusive digital-signal-acquisition technique and temperature & humidity sensing technology, it ensures high reliability and excellent long-term stability. This sensor includes a resistive-type humidity measurement component and an NTC temperature measurement component, and connects to a highperformance 8-bit microcontroller, offering excellent quality, fast response, anti-interference ability and cost-effectiveness.

    DHT11

    
  • MQ-3 - ethanol

    • Application:
      • They are suitable for alcohol checker, Breathalyser
    • Features:
      • High sensitivity to alcohol and small sensitivity to Benzine .
      • Fast response and High sensitivity
      • Stable and long life
      • Simple drive circuit

    MQ-3

    
  • MQ-7 - CO

    • Application:
      • They are used in gas detecting equipment for carbon monoxide(CO) in family and industry or car.
    • Features:
      • High sensitivity to carbon monoxide
      • Stable and long life

    MQ-7

    
  • MQ-2 - LPG

    • Sensitive material of MQ-2 gas sensor is SnO2, which with lower conductivity in clean air. When the target combustible gas exist, The sensor’s conductivity is more higher along with the gas concentration rising. Please use simple electrocircuit, Convert change of conductivity to correspond output signal of gas concentration.
    • MQ-2 gas sensor has high sensitity to LPG, Propane and Hydrogen, also could be used to Methane and other combustible steam, it is with low cost and suitable for different application.
    • Character:
      • Good sensitivity to Combustible gas in wide range
      • High sensitivity to LPG, Propane and Hydrogen
      • Long life and low cost
      • Simple drive circuit
    • Features:
      • Domestic gas leakage detector
      • Industrial Combustible gas detector
      • Portable gas detector

    MQ-2

    

Procedure

• Firstly, we have structured the project:
  • We will have like a Weather Station made with a Raspberry Pi, and the sensors that we have commented previously.
  • This Weather Station will be connected to a server made by us, via Wifi.
  • And all the data will be sent to us and we will put it into our website and mobile app
• Secondly, we are going to test our sensors at the lab, to see if they work well:
  • MG811 - CO2
  • MQ-6 - hydrocarbons (methane, propane...)
  • DHT11 - temperature and humidity
  • MQ-3 - ethanol
  • MQ-7 - CO
  • MQ-2 - LPG
• Thirdly, we have to create our server, where the data will be sent to a google sheets. We still don't know what type of cloud server service we will use.
• Fouthly, we are going to link the google sheets with a mobile phone (Android) app (made with MIT App Inventor).