Add Adafuit Macropad serial connection article

content/articles/2023/adafruit_macropad_conn_serie/files/bidirectionnal/code.py

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+from adafruit_macropad import MacroPad
+import usb_cdc
+import time
+
+macropad = MacroPad()
+serial = usb_cdc.data
+
+def exec_command (data):
+    global timer
+    try:
+        command,option = data.split()
+    except:
+        command = ""
+        option = ""
+    print("cmd: {} | opt: {}".format(command, option))
+    if command == 'time':
+        timer = float(option)
+        print("new timer: {}".format(timer))
+        response = "nouveau timer : {}\r\n".format(option)
+        buffer = bytearray(response)
+        serial.write(buffer)
+    
+def blink(led, light):
+    print('light: {}'.format(light))
+    if light:
+        macropad.pixels[led] = (33, 45, 230)
+    else:
+        macropad.pixels[led] = (0, 0, 0)
+    print('c: {}'.format(macropad.pixels[led]))
+    return False if light else True
+
+timer=2
+light=False
+in_data=bytearray()
+
+while True:
+    light = blink(1, light)
+    time.sleep(timer)
+
+    if serial.in_waiting > 0:
+        while(serial.in_waiting>0):
+            byte = serial.read(1)
+            if byte == b'\r':
+                exec_command(in_data.decode("utf-8"))
+                in_data = bytearray()
+            else:
+                in_data += byte