This dual-purpose sensor is used to measure temperature and barometric pressure. It operates as an I2C slave device.

The actual sensor is tiny but a board is available from China with the I2C connections and power on a standard 0.1 inch header which makes it easily accessible.

Setup

sudo apt-get install picocom
sudo pip3 install mpfshell

Detect

picocom -b 115200 /dev/ttyUSB0
from machine import Pin, I2C
i2c = I2C(scl=Pin(22), sda=Pin(21), freq=100000)
i2c.scan()
[119]

Install

wget https://raw.githubusercontent.com/micropython-IMU/micropython-bmp180/master/bmp180.py
mpfshell --nocolor -no ttyUSB0 -c put bmp180.py
Connected to esp32
mpfshell --nocolor -no ttyUSB0 -c ls
Connected to esp32

Remote files in '/':

       bmp180.py
       boot.py

Run

picocom -b 115200 /dev/ttyUSB0
from machine import Pin, I2C
i2c = I2C(scl=Pin(22), sda=Pin(21), freq=100000)
from bmp180 import BMP180
bmp180 = BMP180(i2c)
print (bmp180.temperature)
26.95987

ESP32 quick reference

BMP180 Micropython