add broadcast device discovery

python/src/ble_discovery.py

@@ -0,0 +1,60 @@
+from bluepy.btle import DefaultDelegate
+from bluepy.btle import Scanner
+
+from data_class import Data
+from devices import get_device
+
+# This is the list, where the responses will be stored from the `handleDiscovery`
+devices = []
+
+
+class ScanDelegate(DefaultDelegate):
+  def __init__(self):
+    DefaultDelegate.__init__(self)
+
+  def handleDiscovery(self, dev, isNewDev, isNewData):
+    global devices
+
+    for (sdid, desc, val) in dev.getScanData():
+      if self.is_temperature(sdid, val):
+        data_obj = Data(val)
+
+        if self.is_atc_device(dev, data_obj):
+          device_from_config = get_device(dev)
+          devices.append([dev, data_obj, device_from_config])
+
+  @staticmethod
+  def is_temperature(sdid, val):
+    if sdid != 22: return False
+    if len(val) != 30: return False
+    return True
+
+  @staticmethod
+  def is_atc_device(dev, data_obj):
+    global devices
+    if 'A4:C1:38' not in dev.addr.upper(): return False
+    for device in devices:
+      if str(device[0].addr) == str(dev.addr): return False
+
+    device_from_config = get_device(dev)
+
+    try:print(f"Device: {dev.addr.upper()} ({dev.addrType}), RSSI: {dev.rssi}dB, Room: {device_from_config.room}")
+    except:print(f"Device: {dev.addr.upper()} ({dev.addrType}), RSSI: {dev.rssi}dB, Room: ?")
+    print(f'\tTemp: {data_obj.temperature}°C, Humid: {data_obj.humidity}%, Batt: {data_obj.battery_percent}%\n')
+    return True
+
+
+def cleanup():
+  global devices
+  devices = []
+
+
+def start_discovery(timeout=20):
+  cleanup()
+  global devices
+  print(f'Start discovery with timout {timeout}s...')
+
+  scanner = Scanner().withDelegate(ScanDelegate())
+  scanner.scan(timeout=timeout, passive=False)
+
+  return devices