bme280: Add support for BMP280 and BME680 sensors (Klipper3d#4040)

This adds support for BMP280 and BME680 sensor ICs, along with fixing calibration data readout for BME280. Gas sensor readout for the BME680 is just the raw compensated value. To get actual meaningful values, more research is needed. Signed-off-by: Michael Kurz <[email protected]>
astepkowski · Mar 15, 2021 · b4437f8 · b4437f8
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diff --git a/config/sample-macros.cfg b/config/sample-macros.cfg
@@ -117,7 +117,7 @@ gcode:
     RESTORE_GCODE_STATE NAME=M600_state
 
 ######################################################################
-# BME280 Environmental Sensor
+# BMP280/BME280/BME680 Environmental Sensor
 ######################################################################
 
 # The macro below assumes you have a BME280 sensor_type defined in one

diff --git a/docs/Command_Templates.md b/docs/Command_Templates.md
@@ -264,7 +264,8 @@ The following are common printer attributes:
   the config file if a `SET_RETRACTION` command alters them.
 - `printer["bme280 <sensor_name>"].temperature`,
   `printer["bme280 <sensor_name>"].humidity`,
-  `printer["bme280 <sensor_name>"].pressure`: The last read values
+  `printer["bme280 <sensor_name>"].pressure`,
+  `printer["bme280 <sensor_name>"].gas`: The last read values
   from the sensor.
 - `printer["htu21d <sensor_name>"].temperature`,
   `printer["htu21d <sensor_name>"].humidity`: The last read values

diff --git a/docs/Config_Reference.md b/docs/Config_Reference.md
@@ -2039,13 +2039,13 @@ sensor_pin:
 #   name in the above list.
 ```
 
-## BME280 temperature sensor
+## BMP280/BME280/BME680 temperature sensor
 
-BME280 two wire interface (I2C) environmental sensor. Note that this
-sensor is not intended for use with extruders and heater beds, but
-rather for monitoring ambient temperature (C), pressure (hPa), and
-relative humidity. See
-[sample-macros.cfg](../config/sample-macros.cfg) for a gcode_macro
+BMP280/BME280/BME680 two wire interface (I2C) environmental sensors.
+Note that thoose sensors aee not intended for use with extruders and
+heater beds, but rather for monitoring ambient temperature (C),
+pressure (hPa), relative humidity and in case of the BME680 gas level.
+See [sample-macros.cfg](../config/sample-macros.cfg) for a gcode_macro
 that may be used to report pressure and humidity in addition to
 temperature.