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    DIY Meteorological Station Based on Arduino

     

    The weather station does not need to use the Internet, you can measure the air pressure, temperature, humidity and the ultraviolet index of the day around you (if you put it around the window), it also has a clock screen display time, date. Design steps: step one Circuit diagram Use Autodesk Fusion 360 to create a housing and print with green PLA. Step two The BMP280 is a pressure temperature sensor that communicates with Arduino using an I2C or SPI protocol, using SPI. Pin connection: CS to D10 SDA to D11 SDO to D12 SCK to D13 At the code section, you need a library to use this sensor. The library is included in the code #include Define the SPI pin of the sensor. In the setup function, the BMP sensor is initialized, in the loop function, use BMP. Readpressure () and bmp. ReadTemperature () command to read pressure and temperature data. The pressure value is used to measure the pressure in HPa as 100. The measurement is highly use BMP.Readaltitude (1005.47) command. Here, this value must be changed according to the average pressure in the location (1005.47). Step three The weather station also has a time screen that shows current time, date, and day. To do this, use the DS231 RTC module, which uses the I2C protocol to communicate, pin connections: SCL TO A5 SDA TO A4 You must use the DS3231_set to set the time and date on the RTC. In the main program, the standard library #include , Then initialize the sensor in the settings, in the loop, use the dht. ReadHumidity () command to read the humidity value. Step five GUVA-S12SD is a Schottky photodiode based on gallium nitride. It has a typical ultraviolet detection wavelength of 240-370 nm (covering UVB and most UVA spectroscopy). It outputs a calibration analog voltage with ultraviolet intensity. Therefore, the simulation value can be read through the Arduino ADC. In the loop function, the read sensor value is simulated and the UV index is calculated: FLOAT SENSORVALUE = AnalogRead (A0); FLOAT SENSORVOLTAGE = SensorValue / 1024 * 5.0; INT UV_INDEX = Sensorvoltage / 0.1; Step six The project I use 0.96 "128 * 64 OLED display, which is used by I2C protocol, pin connection: SCK to A5 SDA TO A4 In the program, including adafrouit_ssd1306 and adafruit_gfx libraries: #include #include Create a display variable and add some bitmaps to display some images. In the setup process, the display is initialized. Then in the loop, use the display.print () function to display each data. Display data at time, pressure, temperature, and humidity, UV_INDEX quad page, there is 5 seconds between each page. Project Demo:

     

     

     

     

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