Introduction: Weather Data on OLED Using Pi Pico and MicroPython

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In this project we are connecting BMP-280 barometric pressure and temperature sensor and SSD-1306 OLED display using Raspberry Pi Pico and showing barometric pressure and temperature using microPython coding.

Supplies

  • Raspberry Pi Pico board
  • BMP-280 Barometric Pressure and Temperature sensor wit I2C support
  • SSD-1306 OLED 0.96" display with SPI support
  • Breadboard and few jumper wires
  • and a Windows/Linux Computer having Thonny installed on it

Step 1: Attach Pi Pico on Breadboard

Attach Pi Pico on breadboard such that the micro USB port should point outside of breadboard.

Step 2: Attach BMP-280 and SSD-1306

Attach BMP-280 and SSD-1306 such that their pins point toward the power supply rail of breadboard.

Step 3: Connect Power Rail

Connect pin 38, ground pin, of Pi Pico to bottom power rail and pin 36, 3.3 volt, to upper power rail of breadboard.

Step 4: Connect Power to BMP-280 and SSD-1306

Now connect VCC pins of BMP-280 and SSD-1306 to upper power rail i.e. 3.3 volt from Pi Pico.
Connect GND pins of BMP-280 and SSD-1306 to lower power rail i.e. GND of Pi Pico.

Step 5: Connect SSD-1306 Data Lines

Connect SSD-1306's other pins to Pi Pico, using jumper wires, as given below:

  • SCL of 1306 to GP2 of Pico
  • SDA of 1306 to GP3 of Pico
  • DC of 1306 to GP4 of Pico
  • RES of 1306 to GP5 of Pico

Step 6: Connect BMP-280 Data Lines

Connect BMP-280's other pins to Pi Pico, using jumper wires, as given below:

  • SDA of 1306 to GP0 of Pico
  • SCL of 1306 to GP1 of Pico

Step 7: Final: MicroPython Code

Download python code file baro.py and other 3 support libraries and open it in Thonny.

Press F5 or Run/Current Script to execute the code. The barometric pressure data and temperature from BMP-280 will be displayed on OLED display in every 2 seconds.

This code can be further modified to send this data to a server using WiFi board or can be stored on a SD card.

Attachments