Step 1: Enable I2C

Open the Raspberry Pi configuration tool:

sudo raspi-config

Navigate to Interface Options > I2C and enable it.
Reboot the Raspberry Pi:

sudo reboot

Step 2: Install Required Libraries

Update your Raspberry Pi:

sudo apt update && sudo apt upgrade -y

Install the I2C tools and the necessary Python libraries:

sudo apt install -y i2c-tools python3-smbus python3-pip

Set up a virtual environment and install the circuitpython-bmp180 library:

python3 -m venv env
source env/bin/activate
pip install adafruit-circuitpython-bmp180

Verify that the BMP180 is detected on the I2C bus:

sudo i2cdetect -y 1

You should see the device address (typically 0x77) in the output.

Step 3: Python Script

Below is the corrected Python script to read data from the BMP180 sensor and send it via an HTTP request.

import os
import urllib3
import board
import busio
import adafruit_bmp180
import time

# global variable
device = 'pi_nas'
http = urllib3.PoolManager()

def http_request(datum, vtype):
    """Sends sensor data via HTTP GET request."""
    url = "[http://192.168.185.14:8080/insert/?value=%s&device=%s&type=%s](http://192.168.185.14:8080/insert/?value=%s&device=%s&type=%s)" % (datum, device, vtype)
    print(url)
    response = http.request('GET', url.replace(" ", "_"))
    the_page = response.read()
    print(f"Server response: {the_page.decode('utf-8')}")

def log_value(value, typeo):
    """Wrapper to make an HTTP request."""
    http_request(value, typeo)

def get_cpu_temperature():
    """Reads the CPU temperature from the Raspberry Pi."""
    res = os.popen('vcgencmd measure_temp').readline()
    return(res.replace("temp=","").replace("'C\n",""))

# main function
def main():
    """
    Main function to initialize the sensor, read data, and log values.
    """
    i2c = busio.I2C(board.SCL, board.SDA)
    bmp = adafruit_bmp180.BMP180_I2C(i2c)

    # change this to match the location's pressure (hPa) at sea level
    bmp.sea_level_pressure = 1013.25

    while True:
        temperature = bmp.temperature
        pressure = bmp.pressure
        altitude = bmp.altitude

        # Print values to console
        print(f"Temperature: {temperature:.1f} °C")
        print(f"Pressure: {pressure:.1f} hPa")
        print(f"Altitude: {altitude:.1f} mts")

        # Log values to the web server
        log_value(get_cpu_temperature(), "CPU Temp")
        log_value(temperature, "Bar Temp")
        log_value(pressure, "Pressure")
        log_value(bmp.sea_level_pressure, "Sea Pressure")
        log_value(altitude, "Altitude")

        time.sleep(2)

if __name__ == "__main__":
    main()