Making the numbers match topic numbers

2022-12-28 18:44:53 +00:00
parent 6e8606fbeb
commit 6ebb615044
81 changed files with 0 additions and 0 deletions
@@ -0,0 +1,38 @@
+import asyncio
+
+import bleak
+
+
+class BleConnection:
+    # See https://learn.adafruit.com/introducing-adafruit-ble-bluetooth-low-energy-friend/uart-service
+    ble_uuid = "6E400001-B5A3-F393-E0A9-E50E24DCCA9E"
+    rx_gatt = "6E400003-B5A3-F393-E0A9-E50E24DCCA9E"
+    tx_gatt = "6E400002-B5A3-F393-E0A9-E50E24DCCA9E"
+    ble_name = "Adafruit Bluefruit LE"
+
+    def __init__(self, receive_handler):
+        self.ble_client = None
+        self.receive_handler = receive_handler
+
+    def _uart_handler(self, _, data: bytes):
+        self.receive_handler(data)
+
+    async def connect(self):
+        print("Scanning for devices...")
+        devices = await bleak.BleakScanner.discover(service_uuids=[self.ble_uuid])
+        print(f"Found {len(devices)} devices")
+        print([device.name for device in devices])        
+        ble_device_info = [device for device in devices if device.name==self.ble_name][0]
+        print(f"Connecting to {ble_device_info.name}...")
+        self.ble_client = bleak.BleakClient(ble_device_info.address)
+        await self.ble_client.connect()
+        print("Connected to {}".format(ble_device_info.name))
+        self.notify_task = asyncio.create_task(
+            self.ble_client.start_notify(self.rx_gatt, self._uart_handler)
+        )
+
+    async def close(self):
+        await self.ble_client.disconnect()
+                
+    async def send_uart_data(self, data):
+        await self.ble_client.write_gatt_char(self.tx_gatt, data)