2.1.28, initiation update to PXT v5.28.24 (#54)

docs/calliope/firststeps/Sensors.md

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+# ERSTE SCHRITTE: DAS 5X5 LED RASTER
+
+## Introduction @unplugged
+
+The Calliope mini is equipped with a number of sensors: It has a temperature sensor, a light sensor, a compass as well as a microphone.
+
+## Step 1 @fullscreen
+
+### Displaying sensor data
+In order to display data from your sensors on the Calliope mini’s LED matrix, you need to select a sensor (value). To do so go to the Basic section and select the "show number 0“ block. Within the number you can now change the "0“ to the value of a sensor.
+
+## Step 2 @fullscreen
+
+### Acceleration sensor
+You can select the acceleration values by dragging the block from the Input section and place it on top of the "0“ (which will disappear).
+
+## Step 3 @fullscreen
+
+### Light sensor
+The light is measured by the LED matrix. You can select the light sensor by dragging the block from the Input section into the number block.
+
+## Step 4 @fullscreen
+
+### Compass
+The built in magnetometer allows the Calliope mini to tell in which direction it is facing. This sensor will provide a value between 0 and 360 degrees. The compass will need to be calibrated before use. Follow the instructions on the Calliope mini and tilt it in a circular fashion to display a complete circle. You can start using it by dragging the block from the Input section into the number block.
+
+## Step 4 @fullscreen
+
+### Temperature sensor
+You can select the temperature sensor by dragging the block from the Input section into the number block.