# specs: https://www.bluetooth.com/specifications/gatt/viewer?attributeXmlFile=org.bluetooth.characteristic.supported_new_alert_category.xml
cn = ble.Characteristic(0x2A47, ble.NOTIFY | ble.READ, 16, "New Alerts",
ble.BYTES)
# Add the GATT Characteristic to the Service
s.add_characteristic(cn)
# Create anothr GATT Characteristic for enabling/disabling alerts
# specs: https://www.bluetooth.com/specifications/gatt/viewer?attributeXmlFile=org.bluetooth.characteristic.alert_notification_control_point.xml
cc = ble.Characteristic(0x2A44, ble.WRITE, 2, "Alerts control", ble.BYTES)
# Add the GATT Characteristic to the Service
s.add_characteristic(cc)
# Add a callback to be notified of changes
cc.set_callback(value_cb)
# Add the Service. You can create additional services and add them one by one
ble.add_service(s)
# Configure security. BLE security is very flexible.
# In this case we declare that the device has only an output capability (CAP_DISPLAY_ONLY),
# that we require a bonding (storage of the keys after pairing)
# and that we want both secure connection and main in the middle protection.
# Since we have CAP_DISPLAY_ONLY, we also declare a passkey that will be shown to the user
# to be entered on the master (i.e. the smartphone) to finalize the bonding.
ble.security(capabilities=ble.CAP_DISPLAY_ONLY,
bonding=ble.AUTH_BOND,
scheme=ble.AUTH_SC | ble.AUTH_MITM,
key_size=16,
passkey=225575)
# To do so, we need a callback to display the passkey when needed
ble.add_callback(ble.EVT_SHOW_PASSKEY, show_key_cb)
characteristic_object_changed = ble.Characteristic(0x2AC8,
ble.NOTIFY | ble.READ,
16, "Object Changed",
ble.BYTES)
characteristic_object_control = ble.Characteristic(0x2AC5, ble.WRITE, 1,
"Object Control Point",
ble.BYTES)
service_object_transfer.add_characteristic(characteristic_object_changed)
service_object_transfer.add_characteristic(characteristic_object_control)
characteristic_object_control.set_callback(receive_cb)
ble.add_service(service_object_transfer)
#set scanning parameters: every 100ms for 50ms and no duplicates
ble.advertising(50)
# Start the BLE stack
ble.add_callback(ble.EVT_SCAN_REPORT, scan_report_cb)
ble.add_callback(ble.EVT_SCAN_STOPPED, scan_stop_cb)
ble.scanning(100, 50, duplicates=0)
ble.start()
ble.start_advertising()