Adding refactored classes for ble sensing with working data collection again

kano_wand/wand_utils.py

@@ -0,0 +1,13 @@
+from kano_wand.constants import *
+
+async def start_notify(client, notification_handler):
+    for char in CHARACTERISTIC_UUIDS.keys():
+        await client.start_notify(char, notification_handler)
+
+
+async def stop_notify(client):
+    for char in CHARACTERISTIC_UUIDS.keys():
+        await client.stop_notify(char)
+
+def chunker(seq, size):
+    return (seq[pos:pos + size] for pos in range(0, len(seq), size))