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Arduino Weather Station Using BMP280-DHT11 - Temperature, Humidity and P
2026-04-22 | By Ron Cutts
License: GNU Lesser General Public License Displays Humidity Temperature Arduino ESP32
In this tutorial, we will learn how to make a weather station that will display temperature, humidity, and pressure on the LCD Display TFT 7735
Watch a demonstration video.
What You Will Need
Arduino UNO (Or any other Arduino)
Visuino program: Download Visuino
The Circuit
LCD TFT ST7735
Connect:
1.8 TFT Display PIN [LED] to Arduino PIN [3.3 V]
1.8 TFT Display PIN [SCK] to Arduino PIN [13]
1.8 TFT Display PIN [SDA] to Arduino PIN [11]
1.8 TFT Display PIN [A0 or DC] to Arduino PIN [9]
1.8 TFT Display PIN [RESET] to Arduino PIN [8]
1.8 TFT Display PIN [CS] to Arduino PIN [10]
1.8 TFT Display PIN [GND] to Arduino PIN [GND]
1.8 TFT Display PIN [VCC] to Arduino PIN [5V]
NOTE: Some Arduino boards have different SPI pins, so make sure you check your board documentation.
BMP280 Sensor
Connect pin [VIN] to Arduino [V5]
Connect pin [GND] to Arduino pin [GND]
Connect pin [SDA] to Arduino pin [SDA]
Connect pin [SCL] to Arduino pin [SCL]
DHT11 Sensor
Connect pin [+] to Arduino [V5]
Connect pin [-] to Arduino pin [GND]
Connect pin [S] to Arduino digital pin [7]
Start Visuino, and select the Arduino UNO board type.
To start programming the Arduino, you will need to have the Arduino IDE installed from here: https://www.arduino.cc/.
Please be aware that there are some critical bugs in Arduino IDE 1.6.6. Make sure that you install 1.6.7 or higher; otherwise, this Instructable will not work! If you have not done so, follow the steps to set up the Arduino IDE to program Arduino UNO! The Visuino: https://www.visuino.eu also needs to be installed. Start Visuino as shown in the first picture. Click on the "Tools" button on the Arduino component (Picture 1) in Visuino. When the dialog appears, select "Arduino UNO" as shown in Picture 2
In Visuino, add components.
Add "Pressure Temperature BMP280 I2C" component
Add "Humidity and Thermometer DHT11/21/22/AM2301" component
Add "TFT Color Display ST7735" component
In Visuino Set Components
Select "Display1" and set "Orientation" to goDown (this will change the direction of displaying)
Note: In case the display does not work, try changing the Type under the properties window
Double-click on the "Display1" and in the elements window, expand "Text" and "Lines" on the right side and drag them to the left side:
4X "Draw Text"
3X "Draw Line"
3X "Text Field"
On the left side, select:
- "Draw Text1" and in the properties window set "Size" to 1, "Color" to aclDodgerBlue, and "X" to 17 and "Text" to WEATHER STATION- "Draw Line1" and in the properties window set "Height" to 0, "Width" to 120 , "Color" to aclDodgerBlue, and "Y" to 0
- "Draw Text2" and in the properties window set "Size" to 1, "Color" to aclRed, "X" to 30, "Y" to 15, and "Text" to TEMPERATURE- "Text Field1" and in the properties window, set "Size" to 2, "Color" to aclYellow, and "X" to 30 and "Y" to 30
- "Draw Line2" and in the properties window set "Height" to 0, "Width" to 120 , "Color" to aclDodgerBlue, and "Y" to 50
- "Draw Text3" and in the properties window set "Size" to 1, "Color" to aclAqua, and "X" to 40, "Y" to 55, and "Text" to HUMIDITY
- "Text Field2" and in the properties window, set "Size" to 2, "Color" to aclYellow, and "X" to 30 and "Y" to 70
- "Draw Line3" and in the properties window set "Height" to 0, "Width" to 120 , "Color" to aclDodgerBlue, and "Y" to 90
- "Draw Text4" and in the properties window set "Size" to 1, "Color" to aclWhite, "X" to 40, "Y" to 95, and "Text" to PRESSURE
- "Text Field3" and in the properties window, set "Size" to 2, "Color" to aclYellow, and "X" to 15 and "Y" to 110
In Visuino Connect Components
Connect "PressureTemperature1" pin [Out] to Arduino I2C [In]
Connect "PressureTemperature1" pin [Pressure] to Display1>TextField3 [In]
Connect "PressureTemperature1" pin [Temperature] to Display1>TextField1 [In]
Connect "HumidityThermometer1" pin [Humidity] to Display1>TextField2 [In]
Connect "HumidityThermometer1" pin [Out] to Arduino digital pin [7]
Connect "Display1" component pin [Out] to Arduino pin SPI [In]
Connect "Display1" component pin [Chip Select] to Arduino Digital pin[10]
Connect "Display1" component pin [Reset] to Arduino Digital pin[8]
Connect "Display1" component pin [Register Select] to Arduino Digital pin[9]
Generate, Compile, and Upload the Arduino Code
In Visuino, Press F9 or click on the button shown in Picture 1 to generate the Arduino code, and open the Arduino IDE
In the Arduino IDE, click on the Upload button to compile and upload the code (Picture 2)
Play
If you power the Arduino UNO module, the LCD will start to show current values (TEMPERATURE, HUMIDITY, PRESSURE).
Congratulations! You have completed your project with Visuino. Also attached is the Visuino project that I created for this; you can download it here and open it in Visuino: https://www.visuino.eu
South Africa