connection + notifs current

.gitignore

@@ -0,0 +1 @@
+__pycache__

main.py

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+# -*- coding: utf-8 -*-
+import argparse
+import asyncio
+import logging
+import struct
+
+from bleak import BleakClient, BleakScanner
+from bleak.backends.characteristic import BleakGATTCharacteristic
+from bleak.uuids import normalize_uuid_str
+
+import myUUIDs
+
+logger = logging.getLogger(__name__)
+
+def current_meas_handler(characteristic: BleakGATTCharacteristic, data: bytearray):
+    value = struct.unpack("<I", data)[0]
+    logger.info("%s: %f", characteristic.description, value * 1.0e-6)
+
+
+async def main():
+    logger.info("starting scan...")
+
+    device = await BleakScanner.find_device_by_address("84:F7:03:1B:C6:A2", cb=dict(use_bdaddr=False))
+    if device is None:
+        logger.error("could not find device with address")
+        return
+
+    logger.info("connecting to device...")
+
+    async with BleakClient(device) as client:
+        logger.info("Connected")
+
+        current_svc_handle = 0
+        services = client.services.services
+        metrology_svcs = [services[i] for i in services if services[i].uuid == normalize_uuid_str(myUUIDs.METROLOGY_SERVICE)]
+
+        current_meas_svc = next(s for s in metrology_svcs if s.get_characteristic(myUUIDs.ELECTRIC_CURRENT_CHAR))
+
+        for c in current_meas_svc.characteristics:
+            await client.start_notify(c, current_meas_handler)
+        
+        await asyncio.Event().wait()
+        # await client.stop_notify(args.characteristic)
+
+
+if __name__ == "__main__":
+    logging.basicConfig(
+        level="INFO",
+        format="%(asctime)-15s %(name)-8s %(levelname)s: %(message)s",
+    )
+    
+    loop = asyncio.get_event_loop()
+    loop.create_task(main())
+    loop.run_forever()   

myUUIDs.py

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+METROLOGY_SERVICE = "1878"
+CONFIGURATION_SERVICE = "1879"
+METROLOGY_RANGE_SERVICE = "1880"
+ELECTRIC_CURRENT_CHAR = "2AEE"
+VOLTAGE_CHAR = "2B18"
+SAMPLING_RATE_CHAR = "2C12"
+ZERO_CALI_CHAR = "2C13"
+ZERO_CALI_NSAMP = "2C14"
+ELECTRIC_CURRENT_RANGE_CHAR = "2AEF"
+AUTO_RANGE_CHAR = "2C15"
+CHAR_PRES_FORMAT = "2904"
+PPM_UNIT_UUID = "27C4"
+PERCENT_UNIT_UUID = "27AD"
+POWER_UNIT_UUID = "2726"
+TESLA_UNIT_UUID = "272D"
+AMPERE_UNIT_UUID = "2704"
+VOLTS_UNIT_UUID = "2728"
+HERTZ_UNIT_UUID = "2722"
+SECONDS_UNIT_UUID = "2703"
+UNITLESS_UNIT_UUID = "2700"
+NSP_DESC_MAIN = "0106"
+NSP_DESC_INSIDE = "010B"
+NSP_DESC_OUTSIDE = "010C"