Added docs about movement sensor

README.org

@@ -11,15 +11,31 @@ picocom /dev/ttyUSB0 -b115200
 #+END_SRC
 
 * Small card
-** Set up distance measuring
+** Distance measuring
+*** HCSR04 Pins
+Trig -- D0
+Echo -- D3
+Vcc  -- 5V
+GND  -- GND
+
+*** Set up distance measuring
 #+begin_src python
 import tablecode.main
 
 tablecode.main.distance(16, 0)
 #+end_src
 
-** HCSR04 Pins
-Trig -- D0
-Echo -- D3
-Vcc  -- 5V
-GND  -- GND
+** Movement sensor
+*** Sensor pins
+5V  -- 5V
+GND -- GND
+OUT -- D0
+
+*** Set up movement sensor
+#+begin_src python
+import machine
+
+pin = machine.Pin(0, mode=machine.Pin.IN, pull=None)
+
+print(pin.value())
+#+end_src