Documentation

// BMP180 - Arduino Example
// Library: Adafruit BMP085 Unified library (works for BMP085 and BMP180)

#include <Wire.h>
#include <Adafruit_Sensor.h>
#include <Adafruit_BMP085_U.h>

Adafruit_BMP085_Unified bmp = Adafruit_BMP085_Unified(10085);

void setup() {
  Serial.begin(9600);
  if (!bmp.begin()) {
    Serial.println("BMP180 not found!");
    while (1) {}
  }
}

void loop() {
  sensors_event_t event;
  bmp.getEvent(&event);

  if (event.pressure) {
    Serial.print("Pressure: "); Serial.print(event.pressure); Serial.println(" hPa");

    float temperature;
    bmp.getTemperature(&temperature);
    Serial.print("Temp: "); Serial.print(temperature); Serial.println(" C");

    float seaLevelPressure = 1013.25;
    Serial.print("Altitude: ");
    Serial.print(bmp.pressureToAltitude(seaLevelPressure, event.pressure));
    Serial.println(" m");
  }
  Serial.println();
  delay(1000);
}

#!/usr/bin/env python3
# BMP180 - Raspberry Pi Python Example
# Install: sudo pip3 install adafruit-circuitpython-bmp085

import time
import board
import adafruit_bmp085

i2c = board.I2C()
bmp = adafruit_bmp085.Adafruit_BMP085(i2c)

while True:
    print(f"Temp:     {bmp.temperature:.2f} C")
    print(f"Pressure: {bmp.pressure:.2f} hPa")
    print(f"Altitude: {bmp.altitude:.2f} m\n")
    time.sleep(1)

# BMP180 - Pico MicroPython
# Library: bmp180.py from Sebastian Wallkoetter (search GitHub).

from machine import Pin, I2C
from bmp180 import BMP180
import time

i2c = I2C(0, scl=Pin(5), sda=Pin(4), freq=400_000)
bmp = BMP180(i2c)
bmp.oversample_sett = 2
bmp.baseline = 101325   # sea-level pressure in Pa

while True:
    print("Temp:     {:.2f} C".format(bmp.temperature))
    print("Pressure: {:.2f} hPa".format(bmp.pressure / 100))
    print("Altitude: {:.2f} m\n".format(bmp.altitude))
    time.sleep(1)