Implement notetaking app, ST7796 display with touch support, audio beep navigation, and video streaming

ble_util.py

@@ -1,25 +1,40 @@
-import bluetooth
+try:
+    import bluetooth
+    has_ble = True
+except ImportError:
+    has_ble = False
+
 import struct
 import time
 
-# BLE UUID definitions (Nordic UART Service)
-_UART_UUID = bluetooth.UUID("6E400001-B5A3-F393-E0A9-E50E24DCCA9E")
-_UART_TX = (
-    bluetooth.UUID("6E400003-B5A3-F393-E0A9-E50E24DCCA9E"),
-    bluetooth.FLAG_NOTIFY,
-)
-_UART_RX = (
-    bluetooth.UUID("6E400002-B5A3-F393-E0A9-E50E24DCCA9E"),
-    bluetooth.FLAG_WRITE | bluetooth.FLAG_WRITE_NO_RESPONSE,
-)
-_UART_SERVICE = (_UART_UUID, (_UART_TX, _UART_RX))
+if not has_ble:
+    class BLEUART:
+        def __init__(self, ble=None, name="ESP32-S3-RLCD"):
+            print("BLE not supported on this platform.")
+        def on_rx(self, callback): pass
+        def write(self, data): return False
+        def is_connected(self): return False
+        def scan(self, duration_ms=3000): return {}
+        def close(self): pass
+else:
+    # BLE UUID definitions (Nordic UART Service)
+    _UART_UUID = bluetooth.UUID("6E400001-B5A3-F393-E0A9-E50E24DCCA9E")
+    _UART_TX = (
+        bluetooth.UUID("6E400003-B5A3-F393-E0A9-E50E24DCCA9E"),
+        bluetooth.FLAG_NOTIFY,
+    )
+    _UART_RX = (
+        bluetooth.UUID("6E400002-B5A3-F393-E0A9-E50E24DCCA9E"),
+        bluetooth.FLAG_WRITE | bluetooth.FLAG_WRITE_NO_RESPONSE,
+    )
+    _UART_SERVICE = (_UART_UUID, (_UART_TX, _UART_RX))
 
-# BLE IRQ constants
-_IRQ_CENTRAL_CONNECT = 1
-_IRQ_CENTRAL_DISCONNECT = 2
-_IRQ_GATTS_WRITE = 3
+    # BLE IRQ constants
+    _IRQ_CENTRAL_CONNECT = 1
+    _IRQ_CENTRAL_DISCONNECT = 2
+    _IRQ_GATTS_WRITE = 3
 
-class BLEUART:
+class _ActiveBLEUART:
     """A helper class to manage BLE UART (Serial Over BLE) for raw text data exchange."""
     
     def __init__(self, ble=None, name="ESP32-S3-RLCD"):
@@ -174,3 +189,6 @@ class BLEUART:
             self._ble.gap_disconnect(conn_handle)
         self._ble.active(False)
         print("BLE closed.")
+
+if has_ble:
+    BLEUART = _ActiveBLEUART