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Refactor bme280, add SPI support (#17314)
Co-authored-by: Franck Nijhof <git@frenck.dev>
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Kuzj
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@ -10,11 +10,7 @@ ha_platforms:
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- sensor
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---
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The `bme280` sensor platform allows you to read temperature, humidity and pressure values of a [Bosch BME280 Environmental sensor](https://cdn-shop.adafruit.com/datasheets/BST-BME280_DS001-10.pdf) connected via [I2c](https://en.wikipedia.org/wiki/I²C) bus (SDA, SCL pins). It allows you to use all the operation modes of the sensor described in its datasheet.
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Tested devices:
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- [Raspberry Pi](https://www.raspberrypi.org/)
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The Bosch BME280 integration allows you to read temperature, humidity and pressure values of a [Bosch BME280 Environmental sensor](https://cdn-shop.adafruit.com/datasheets/BST-BME280_DS001-10.pdf) connected via [I2c](https://en.wikipedia.org/wiki/I²C) bus (SDA, SCL pins) or connected via SPI. It allows you to use all the operation modes of the sensor described in its datasheet.
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## Configuration
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@ -22,8 +18,8 @@ To use your BME280 sensor in your installation, add the following to your `confi
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```yaml
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# Example configuration.yaml entry
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sensor:
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- platform: bme280
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bme280:
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- name: Ambient
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```
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{% configuration %}
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@ -82,6 +78,14 @@ monitored_conditions:
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required: false
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default: All three conditions
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type: list
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spi_bus:
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description: sensor SPI bus number.
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required: false
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type: integer
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spi_dev:
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description: sensor SPI device number.
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required: false
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type: integer
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{% endconfiguration %}
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## Full Examples
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@ -90,9 +94,8 @@ If you want to specify the working mode of the digital sensor or need to change
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```yaml
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# Example of customized configuration.yaml entry
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sensor:
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- platform: bme280
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name: Ambient
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bme280:
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- name: Ambient
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i2c_address: 0x77
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operation_mode: 2 # forced mode
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time_standby: 5
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@ -142,6 +145,10 @@ group:
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## Directions for installing smbus support on Raspberry Pi
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<div class="note">
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This section only applies to devices running the Home Assistant Core installation method.
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</div>
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Enable I2c interface with the Raspberry Pi configuration utility:
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```bash
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@ -187,3 +194,81 @@ It will output a table like this:
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```
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So you can see the sensor address what you are looking for is **0x77** (there are more i2c sensors in that Raspberry Pi).
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## SPI Support
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Alternatively, this integration can also be used with SPI.
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### Config example
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```yaml
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# Example of customized configuration.yaml entry
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bme280:
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- name: Stary_Oskol
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spi_bus: 0
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spi_dev: 1
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time_standby: 5
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oversampling_temperature: 4
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oversampling_pressure: 4
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oversampling_humidity: 4
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monitored_conditions:
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- temperature
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- humidity
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- pressure
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scan_interval: 40
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```
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## Directions for installing SPI support on Raspberry Pi
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<div class="note">
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This section only applies to devices running the Home Assistant Core installation method.
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</div>
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Enable SPI interface with the Raspberry Pi:
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```bash
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sudo groupadd spi
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# Add homeassistant user to the spi group
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sudo usermod -a -G spi user
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# Add udev rules
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sudo echo 'SUBSYSTEM=="spidev", GROUP="spi", MODE="0660"' > /etc/udev/rules.d/77-spi.rules
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# apply changes without logout
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newgrp spi
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sudo udevadm control --reload-rules && udevadm trigger
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```
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```bash
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sudo echo 'dtparam=spi=on' >> /boot/firmware/config.txt
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sudo echo 'dtoverlay=spi1-3cs' >> /boot/firmware/config.txt
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sudo reboot
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```
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### Check the spi devices
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```bash
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ls /dev/spidev*
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/dev/spidev0.0 /dev/spidev0.1 /dev/spidev1.0 /dev/spidev1.1 /dev/spidev1.2
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```
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## Connect sensors
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### SPI0 (available on J8/P1 headers on all Raspberry Pi versions)
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|SPI Function|Header Pin|Broadcom Pin Name|Broadcom Pin Function|
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|------------|----------|-----------------|---------------------|
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|MOSI |19 |GPIO10 |SPI0_MOSI
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|MISO |21 |GPIO09 |SPI0_MISO
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|SCLK |23 |GPIO11 |SPI0_SCLK
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|CE0 |24 |GPIO08 |SPI0_CE0_N
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|CE1 |26 |GPIO07 |SPI0_CE1_N
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### SPI1 (available only on 40-pin J8 header)
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|SPI Function|Header Pin|Broadcom Pin Name|Broadcom Pin Function|
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|------------|----------|-----------------|---------------------|
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|MOSI |38 |GPIO20 |SPI1_MOSI
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|MISO |35 |GPIO19 |SPI1_MISO
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|SCLK |40 |GPIO21 |SPI1_SCLK
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|CE0 |12 |GPIO18 |SPI1_CE0_N
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|CE1 |11 |GPIO17 |SPI1_CE1_N
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|CE2 |36 |GPIO16 |SPI1_CE2_N
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