Create controller.py

rc_car/controller.py

@@ -0,0 +1,44 @@
+# For the micro:bit RC car controller
+
+RADIO_CHANNEL = 42  # radio channel: 0~255
+
+from microbit import display, Image, accelerometer, sleep
+from math import pi, atan2, sqrt
+import radio
+
+radio.config(group=RADIO_CHANNEL)
+radio.on()
+
+def rotationPitch():
+    return atan2(
+            accelerometer.get_y(), 
+            sqrt(accelerometer.get_x() ** 2 + accelerometer.get_z() ** 2)
+            ) * (180 / pi)
+
+def rotationRoll():
+    return atan2(
+            accelerometer.get_x(), 
+            sqrt(accelerometer.get_y() ** 2 + accelerometer.get_z() ** 2)
+            ) * (180 / pi)
+
+while True:
+    pitch = rotationPitch()
+    roll = rotationRoll()
+    
+    if pitch < -30:
+        display.show(Image.ARROW_N)
+        radio.send('forward')
+    elif pitch > 30:
+        display.show(Image.ARROW_S)
+        radio.send('backward')
+    elif roll > 30:
+        display.show(Image.ARROW_E)
+        radio.send('left')
+    elif roll < -30:
+        display.show(Image.ARROW_W)
+        radio.send('right')
+    else:
+        display.show(Image.SQUARE)
+        radio.send('stop')
+        
+    sleep(250)