Bluetooth examples for chapter 9

ch-9/1-bluetooth-basics/1-hello-world/code.py

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+import board 
+from digitalio import DigitalInOut
+import time
+import busio
+import supervisor
+
+led = DigitalInOut(board.LED)
+led.switch_to_output()
+
+# PICO UART pins? What am i not using?
+uart = busio.UART(board.GP12,board.GP13,baudrate=9600, timeout=0.01)
+
+print("Waiting for bytes on UART...")
+while True:
+    data = uart.read(32)
+    if data is not None:
+        print(data)
+    if supervisor.runtime.serial_bytes_available:
+        value = input().strip()
+        print(f"Received: {value}\r")
+        uart.write(value.encode())