Difference between revisions of "Open Source WiFi Weather Station System"

Outline

• Project: Open Source WIFI Weather Station System.(ESP8266 connected to Blynk)
• Objective: To get temperature, humidity, light intensity and even PM2.5 data around you.
• Difficulty: Medium
• Project Time: 2 Hours
• Creator: Ray

Introduction:

• The station monitors temperature, humidity, light intensity and even PM2.5 (particulate matter) data around you.
• Display the sensor data on the OLED screen.
• The station can be synced with Blynk to upload sensor data.
• Access the data anytime using the Blynk app.

Bill of Material

Microduino Equipment

Other Equipment

Principle of the Experiment

This Weather Station collects the following:

• Temperature and humidity with a Microduino-Temp&Hum
• Light intensity with a Microduino-Light
• Air quality with a Microduino-Air Quality
• PM2.5 with a GP2Y1010AU0F module.

• Uses a Microduino-Core+ to analyze and process sensor data.
• Display data on a Microduino-OLED
• Connect the Weather Station with Blynk via a Microduino-WIFI(ESP)
• Each sensor connects with the Microduino-Sensorhub

Get and Configure Blynk

Next, we'll learn how Microduino interacts with Blynk through the configuration process of the Weather Station.

Get Blynk Phone Client

• Please refer to [Get and Configure Blynk]

Add Configuration Items

You can scan the two-dimension code below to get Weather Station APP.

Also, you can make your own one. In this case, you can click the panel and call out WIDGET BOX, on which you can see many choices.

Add Value Display item and name "temperature" to display Temperature value acquired. Select V2 on INPUT; Choose PUSH on READING FREQUENCY, which indicates the temperature is sent from the Weather Station and the frequency is controlled by Microduino Client.

void senTempHumi() {
  am2321.read();
  float sensor_tem = am2321.temperature / 10.0;
  float sensor_hum = am2321.humidity / 10.0;
  Blynk.virtualWrite(V2, sensor_tem);
  Blynk.virtualWrite(V3, sensor_hum);

  oled(sensor_tem, sensor_hum, sensor_light, sensorPM25, Sensor_etoh); 
}

The setting of the humidity is similar with that of temperature; Set INPUT as V3 and send it through a timer function " senTempHumi()".

void senTempHumi() {
  SimpleTimer temHumtimer;
  temHumtimer.setInterval(2000L, senTempHumi);
}

Set PM2.5's INPUT as V6, READING FREQUENCY as 5s, which represents frequency of the acquired PM2.5 data.

BLYNK_READ(V6) {
  Blynk.virtualWrite(V6, sensorPM25);
}

Similarly, set the INPUT of the Light Sensor as V4 and the frequency is to get value every 3s.

BLYNK_READ(V4) {
  sensor_light = map(analogRead(A0), 0, 1023, 0, 255);
  Blynk.virtualWrite(V4, sensor_light);
}

The INPUT of the methane gas is V5 and the frequency is to get value every 5s.

BLYNK_READ(V5) {
  Sensor_etoh= map(analogRead(A2), 0, 1023, 0, 30);
  Blynk.virtualWrite(V5, Sensor_etoh);
}

See "Button Setting" next. Set OUTPUT as V6 and MODE as SWITCH, meaning each time you press the button, you can switch electric level of the D6 pin at the Microduino Client.

For more intuitive data display, you can add one or more History Graph. Can be set as data graph displaying V2 and V3. (can achieve four data display at most.)

The second History Graph can be used for displaying V6, PM2.5.

Finally, your phone panel turns into this:

Program Download

Weather Station Code: ESP8266BlynkWeatherStation

Programming

• Stack Microduino-Core+ and Microduino-USBTTL together.
  • Connect Microduino-USBTTL for program uploading with a USB cable.
  • Attention: Please upload programs before stacking all modules together.
• Open Arduino IDE for Microduino development environment. (Please refer to: AVR Core：Getting started)
• Click 【Tool】, make sure the right board card(Microduino-Core+) and processor(Atmega644pa@16M,5V), select the corresponding port (COMX) .
• Click【File】->【Open】, scan to the program address, click "ESP8266BlynkWeatherStation.ino" and open it.
• After that, please click the button "→" to upload programs to the development board.

Hardware Buildup

• Step1
  • Fixate Microduino-OLED and Structure-A1 with screws.

• Step2
  • Assemble Structure-B1~B5 with Structure-B6.

• Step3
  • Fixate Microduino-Duo-h on Structure-A2 with screws and nuts.
  • Stack the following modules on Microduino-Duo-h.
    • Microduino-Core+
    • Microduino-USBTTL
    • Microduino-Sensorhub
  • Stick the well preparedPM2.5 SensorGP2Y1010AU0F to the base board.

• Step4
  • Assemble the following sensors with Structure-B7, B8, B9.
    • Temperature and humidity sensorMicroduino-Temp&Hum
    • Air quality detectorMicroduino-Air Quality
    • Light sensorMicroduino-Light

• Step5
  • Connect the sensors below to Microduino-Sensorhub.
    • Temperature and humidity sensorMicroduino-Temp&Hum
    • Air quality detectorMicroduino-Air Quality
    • Light sensorMicroduino-Light
  • Refer to the picture below, stack all sensors on the slot of Structure-B1 and Structure-B2.
  • After that, connect Structure-A1 and Structure-A2 at the top and bottom of the system respectively.

• Step6
  • Complete the steps above, then fixate with Structure-B0 and plug in a USB cable. Congratulations! You just finished the buildup of the Weather Station.

• Step7
  • You can see sensor data on Microduino-OLED after setting.
  • At the same time, you can also see uploaded data of the Weather Station on your phone Blynk.

Notes

• Please make sure the verification code is configured right.
• Make sure your router runs normally, the SSID and password are correct.