BME280 is a temperature sensor, it also gives humidity and pressure. I use it as chamber temperature sensor in my Voron 2.4.
There is several form factor, be careful to have the one on picture to use this mount

(eg. https://www.amazon.com/KeeYees-Temperature-Humidity-Atmospheric-Barometric/dp/B07KYJNFMD)
Plugged on Pi :
[mcu rpi]
serial: /tmp/klipper_host_mcu
[temperature_sensor chamber]
sensor_type: BME280
i2c_address: 118
i2c_mcu: rpi
i2c_bus: i2c.1
Plugged on BTT Octopus (PA8/PA9):
i2c_bus is not well documented , you can find it in source of klipper: for example BTT Octopus has STM32 cpu , look at https://github.com/Klipper3d/klipper/blob/master/src/stm32/i2c.c
[temperature_sensor chamber]
sensor_type: BME280
i2c_address: 118
i2c_bus: i2c1a| Category | Qty | Description | Notes |
| Hardware | 1 | BME sensor | |
| Hardware | 2 | M3x8 BHCS | |
| Hardware | 1 | M3 T-nut | for 2020 extrusion V2.4 |
| Hardware | 1 | M3 Drop-in nut | See DIY Drop-in nuts |
The author marked this model as their own original creation.