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
| Equipment |
Number |
Function
|
| Micro-USB cable |
1 |
For program download and power supply
|
| GP2Y1010AU0F |
1 |
PM2.5 sensor
|
| Screw |
7 |
Fixate modules
|
| Screwdriver |
1 |
Fixate screws
|
| Shell |
1 |
|
Principle of the Experiment
This Weather Station collects the following:
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
Add Configuration Items
- Scan the two-dimension code below to get Weather Station APP onto Blynk.
|
|
- 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.
|
|
|
The corresponding code at the Microduino Client is:
|
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()".
|
|
- The frequency of the timer can be achieved by codes below:
|
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.
|
|
- The corresponding code at the Microduino Client is:
|
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.
|
|
- The corresponding code at the Microduino Client is:
|
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.
|
|
- The corresponding code at the Microduino Client is:
|
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:
|
|
Programming and Uploading
Weather Station Code: ESP8266BlynkWeatherStation
- Stack the Microduino-Core+ and the Microduino-USBTTL together.
- Connect the Microduino-USBTTL to your computer with the included MicroUSB cable.
- Attention: Please upload program before stacking all modules together. As having the WiFi module connected will cause programming issues.
- Follow the software setup guide for your OS at: http://wiki.microduinoinc.com/Software_Setup:_Arduino
- Once your software is successfully installed, open the software.
- Configure the software to program the Core+ module:
- Select Tools > Board > Microduino/mCookie-device (for Windows) or Tools > Board > Microduino/mCookie-Core+ (644pa) (for Mac OS).
- Select Tools > Processor > Microduino/mCookie Core+ (644pa)@16M,5V (for Windows) or Tools > Board > Atmega644pa@16M,5V (for Mac OS).
- Select Tools > Port (Usually what is selectable, if using Mac, it is not the Bluetooth one).
- Download the code for Weather Station here: File:ESP8266BlynkWeatherStationV2.zip
- Unzip the file. Under the software (Arduino IDE), go to File > Open... and navigate to the unzipped folder and open the ESP8266BlynkWeatherStation.ino file.
- Click on the upload button (right arrow icon on the top left) to upload the program.
- The program will compile and upload. Once completed a upload successful message will appear on the bottom left.
Hardware Buildup
- Step2
- Assemble Structure-B1~B5 with Structure-B6.
- Step4
- Assemble the following sensors with Structure-B7, B8, B9.
- Step5
- Connect the sensors below to Microduino-Sensorhub.
- 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.
|
