Bluetooth examples for chapter 9

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

@@ -0,0 +1,21 @@
+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())

ch-9/1-bluetooth-basics/2-read-control-packets/code.py

@@ -0,0 +1,35 @@
+import board 
+from digitalio import DigitalInOut
+import time
+import busio
+import supervisor
+import adafruit_bluefruit_connect.button_packet, adafruit_bluefruit_connect.quaternion_packet
+
+
+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:
+      if data[0] == b'!'[0]:
+        print("Looks like a control packet")
+        if data[1] == b'B'[0]:
+          buttons = adafruit_bluefruit_connect.button_packet.ButtonPacket.from_bytes(data)
+          print("Button:", buttons.button, "pressed:", buttons.pressed)
+        elif data[1] == b'Q'[0]:
+          quaternion = adafruit_bluefruit_connect.quaternion_packet.QuaternionPacket.from_bytes(data)
+          print(f"Quaternion: {quaternion.w} + {quaternion.x}i + {quaternion.y}j + {quaternion.z}k")
+        else:
+          print("Data[1]:", data[1])
+      else:
+        print("Data[0]:", data[0])
+        print(data)
+    if supervisor.runtime.serial_bytes_available:
+        value = input().strip()
+        print(f"Received: {value}\r")
+        uart.write(value.encode())

ch-9/1-bluetooth-basics/3-random-walk-graph/code.py

@@ -0,0 +1,36 @@
+import board 
+from digitalio import DigitalInOut
+import time
+import busio
+import supervisor
+import random
+
+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)
+
+
+def robot_data_source():
+  sensor1 = random.randint(-100, 100)/100
+  sensor2 = random.randint(-100, 100)/100
+  while True:
+      yield sensor1 * 100,sensor2 * 100
+      sensor1 += random.randint(-100, 100)/1000
+      sensor2 += random.randint(-100, 100)/800
+
+data_source = robot_data_source()
+
+print("Waiting for bytes on UART...")
+while True:
+    data = uart.read(32)
+    if data is not None:
+        print(data)
+    # if our monotic time is a multiple of 50
+    time.sleep(0.1)
+    # 0.05 is too fast, 0.1 is about write - so 10 per second.
+    sensor1, sensor2 = next(data_source)
+    sensor_packet = f"{int(sensor1)},{int(sensor2)}\n"
+    print(sensor_packet, end='')
+    uart.write(sensor_packet.encode('utf-8'))