lm75: Added support for LM75/LM75A I2C connected temperature sensors (#3101)

Signed-off-by: Boleslaw Ciesielski <combolek@users.noreply.github.com>

config/example-extras.cfg

@@ -1036,6 +1036,30 @@
 #htu21d_report_time:
 #   interval in seconds between readings. Default is 30
 
+# LM75/LM75A two wire (I2C) connected temperature sensors.
+# These sensors have range up to 125 C, so are usable for e.g. chamber
+# temperature monitoring. They can also function as simple
+# fan/heater controllers but this mode is not used here.
+#[temperature_sensor my_sensor]
+# See the "temperature_sensor" section below for a description of its
+# parameters. The parameters below describe LM75 family sensor parameters.
+#sensor_type:
+#   Must be "LM75"
+#i2c_address:
+#  Default is 72 (0x48). Normal range is 72-79 (0x48-0x4F) and the 3 low
+#  bits of the address are configured via pins on the chip (usually
+#  with jumpers or hard wired).
+#i2c_mcu:
+#  MCU the sensor is connected to.  Default is the primary mcu.
+#i2c_bus:
+#  The I2C bus the sensor is connected to.  On some MCU platforms the default
+#  is bus 0.  On platforms without bus 0 this parameter is required.
+#i2c_speed:
+#  The I2C speed (in Hz) to use when communicating with the sensor.  Default
+#  is 100000.  On some MCUs changing this value has no effect.
+#lm75_report_time:
+#   interval in seconds between readings. Default is 0.8, with minimum 0.5
+
 # Generic heaters (one may define any number of sections with a
 # "heater_generic" prefix). These heaters behave similarly to standard
 # heaters (extruders, heated beds). Use the SET_HEATER_TEMPERATURE