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// Display - https://pmdway.com/collections/oled-displays/products/0-49-64-x-32-white-graphic-oled-i2c
// Guide - https://pmdway.com/blogs/product-guides-for-arduino/tutorial-using-the-0-49-64-x-32-graphic-i2c-oled-display-with-arduino
// TCA9548A - https://pmdway.com/blogs/product-guides-for-arduino/using-the-tca9548a-1-to-8-i2c-multiplexer-breakout-with-arduino
// BMP180 - https://pmdway.com/collections/altitude-sensors/products/bmp180-barometric-pressure-sensor-board
// BMP180 library - https://github.com/adafruit/Adafruit-BMP085-Library
#include <Arduino.h>
#include <U8g2lib.h>
#include <Adafruit_BMP085.h>
#include <Wire.h>
U8G2_SSD1306_64X32_1F_F_HW_I2C u8g2(U8G2_R0, /* reset=*/ U8X8_PIN_NONE);
Adafruit_BMP085 bmp;
int temperature;
void TCA9548A(uint8_t bus)
{
Wire.beginTransmission(0x70); // TCA9548A address is 0x70
Wire.write(1 << bus); // send byte to select bus
Wire.endTransmission();
}
void setup()
{
Wire.begin();
u8g2.begin();
TCA9548A(7); // select I2C bus 7 for the BMP180
if (!bmp.begin())
{
Serial.println("Could not find a valid BMP085 sensor, check wiring!");
while (1) {}
}
}
void loop()
{
// first, get the temperature from the BMP180
TCA9548A(7); // select I2C bus 7 for the BMP180
temperature = int(bmp.readTemperature());
// next, display the temperature on the OLED
TCA9548A(0); // select I2C bus 0 for the OLED
u8g2.clearBuffer(); // clear the internal memory
u8g2.setFont(u8g2_font_inb24_mr ); // choose a suitable font
u8g2.setCursor(0, 24);
u8g2.print(temperature);
u8g2.sendBuffer();
delay(100);
}
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