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@@ -2082,6 +2082,40 @@ sensor_type: lm75
# 0.5.
```
+## Builtin micro-controller temperature sensor
+
+The atsam, atsamd, and stm32 micro-controllers contain an internal
+temperature sensor. One can use the "temperature_mcu" sensor to
+monitor these temperatures.
+
+```
+sensor_type: temperature_mcu
+#sensor_mcu: mcu
+# The micro-controller to read from. The default is "mcu".
+#sensor_temperature1:
+#sensor_adc1:
+# Specify the above two parameters (a temperature in Celsius and an
+# ADC value as a float between 0.0 and 1.0) to calibrate the
+# micro-controller temperature. This may improve the reported
+# temperature accuracy on some chips. A typical way to obtain this
+# calibration information is to completely remove power from the
+# printer for a few hours (to ensure it is at the ambient
+# temperature), then power it up and use the QUERY_ADC command to
+# obtain an ADC measurement. Use some other temperature sensor on
+# the printer to find the corresponding ambient temperature. The
+# default is to use the factory calibration data on the
+# micro-controller (if applicable) or the nominal values from the
+# micro-controller specification.
+#sensor_temperature2:
+#sensor_adc2:
+# If sensor_temperature1/sensor_adc1 is specified then one may also
+# specify sensor_temperature2/sensor_adc2 calibration data. Doing so
+# may provide calibrated "temperature slope" information. The
+# default is to use the factory calibration data on the
+# micro-controller (if applicable) or the nominal values from the
+# micro-controller specification.
+```
+
## RPi temperature sensor
CPU temperature from the Raspberry Pi running the host software.