// Sample Services. 
        attributes.put("0000180d-0000-1000-8000-00805f9b34fb", "Heart Rate Service"); 
        attributes.put("0000180a-0000-1000-8000-00805f9b34fb", "Device Information Service"); 
        // Sample Characteristics. 
        attributes.put("00002a37-0000-1000-8000-00805f9b34fb", "Heart Rate Measurement"); 
        attributes.put("00002a29-0000-1000-8000-00805f9b34fb", "Manufacturer Name String"); 
    
        // GATT Services 
        attributes.put("00001800-0000-1000-8000-00805f9b34fb", "GenericAccess"); 
        attributes.put("00001801-0000-1000-8000-00805f9b34fb", "GenericAttribute"); 
 
        // GATT Declarations 
        attributes.put("00002800-0000-1000-8000-00805f9b34fb", "Primary Service"); 
        attributes.put("00002801-0000-1000-8000-00805f9b34fb", "Secondary Service"); 
        attributes.put("00002802-0000-1000-8000-00805f9b34fb", "Include"); 
        attributes.put("00002803-0000-1000-8000-00805f9b34fb", "Characteristic"); 
         
        // GATT Descriptors 
        attributes.put("00002900-0000-1000-8000-00805f9b34fb", "Characteristic Extended Properties"); 
        attributes.put("00002901-0000-1000-8000-00805f9b34fb", "Characteristic User Description"); 
        attributes.put("00002902-0000-1000-8000-00805f9b34fb", "Client Characteristic Configuration"); 
        attributes.put("00002903-0000-1000-8000-00805f9b34fb", "Server Characteristic Configuration"); 
        attributes.put("00002904-0000-1000-8000-00805f9b34fb", "Characteristic Presentation Format"); 
        attributes.put("00002905-0000-1000-8000-00805f9b34fb", "Characteristic Aggregate Format"); 
        attributes.put("00002906-0000-1000-8000-00805f9b34fb", "Valid Range"); 
        attributes.put("00002907-0000-1000-8000-00805f9b34fb", "External Report Reference Descriptor"); 
        attributes.put("00002908-0000-1000-8000-00805f9b34fb", "Report Reference Descriptor"); 
 
        // GATT Characteristics 
        attributes.put("00002a00-0000-1000-8000-00805f9b34fb", "Device Name"); 
        attributes.put("00002a01-0000-1000-8000-00805f9b34fb", "Appearance"); 
        attributes.put("00002a02-0000-1000-8000-00805f9b34fb", "Peripheral Privacy Flag"); 
        attributes.put("00002a03-0000-1000-8000-00805f9b34fb", "Reconnection Address"); 
        attributes.put("00002a04-0000-1000-8000-00805f9b34fb", "PPCP"); 
        attributes.put("00002a05-0000-1000-8000-00805f9b34fb", "Service Changed"); 
         
        // GATT Service UUIDs 
        attributes.put("00001802-0000-1000-8000-00805f9b34fb", "Immediate Alert"); 
        attributes.put("00001803-0000-1000-8000-00805f9b34fb", "Link Loss"); 
        attributes.put("00001804-0000-1000-8000-00805f9b34fb", "Tx Power"); 
        attributes.put("00001805-0000-1000-8000-00805f9b34fb", "Current Time Service"); 
        attributes.put("00001806-0000-1000-8000-00805f9b34fb", "Reference Time Update Service"); 
        attributes.put("00001807-0000-1000-8000-00805f9b34fb", "Next DST Change Service"); 
        attributes.put("00001808-0000-1000-8000-00805f9b34fb", "Glucose"); 
        attributes.put("00001809-0000-1000-8000-00805f9b34fb", "Health Thermometer"); 
        attributes.put("0000180a-0000-1000-8000-00805f9b34fb", "Device Information"); 
        attributes.put("0000180b-0000-1000-8000-00805f9b34fb", "Network Availability"); 
        attributes.put("0000180d-0000-1000-8000-00805f9b34fb", "Heart Rate"); 
        attributes.put("0000180e-0000-1000-8000-00805f9b34fb", "Phone Alert Status Service"); 
        attributes.put("0000180f-0000-1000-8000-00805f9b34fb", "Battery Service"); 
        attributes.put("00001810-0000-1000-8000-00805f9b34fb", "Blood Pressure"); 
        attributes.put("00001811-0000-1000-8000-00805f9b34fb", "Alert Notification Service"); 
        attributes.put("00001812-0000-1000-8000-00805f9b34fb", "Human Interface Device"); 
        attributes.put("00001813-0000-1000-8000-00805f9b34fb", "Scan Parameters"); 
        attributes.put("00001814-0000-1000-8000-00805f9b34fb", "Running Speed and Cadence"); 
        attributes.put("00001816-0000-1000-8000-00805f9b34fb", "Cycling Speed and Cadence"); 
        attributes.put("00001818-0000-1000-8000-00805f9b34fb", "Cycling Power"); 
        attributes.put("00001819-0000-1000-8000-00805f9b34fb", "Location and Navigation"); 
     
        // GATT Characteristic UUIDs 
        attributes.put("00002a06-0000-1000-8000-00805f9b34fb", "Alert Level"); 
        attributes.put("00002a07-0000-1000-8000-00805f9b34fb", "Tx Power Level"); 
        attributes.put("00002a08-0000-1000-8000-00805f9b34fb", "Date Time"); 
        attributes.put("00002a09-0000-1000-8000-00805f9b34fb", "Day of Week"); 
        attributes.put("00002a0a-0000-1000-8000-00805f9b34fb", "Day Date Time"); 
        attributes.put("00002a0c-0000-1000-8000-00805f9b34fb", "Exact Time 256"); 
        attributes.put("00002a0d-0000-1000-8000-00805f9b34fb", "DST Offset"); 
        attributes.put("00002a0e-0000-1000-8000-00805f9b34fb", "Time Zone"); 
        attributes.put("00002a0f-0000-1000-8000-00805f9b34fb", "Local Time Information"); 
        attributes.put("00002a11-0000-1000-8000-00805f9b34fb", "Time with DST"); 
        attributes.put("00002a12-0000-1000-8000-00805f9b34fb", "Time Accuracy"); 
        attributes.put("00002a13-0000-1000-8000-00805f9b34fb", "Time Source"); 
        attributes.put("00002a14-0000-1000-8000-00805f9b34fb", "Reference Time Information"); 
        attributes.put("00002a16-0000-1000-8000-00805f9b34fb", "Time Update Control Point"); 
        attributes.put("00002a17-0000-1000-8000-00805f9b34fb", "Time Update State"); 
        attributes.put("00002a18-0000-1000-8000-00805f9b34fb", "Glucose Measurement"); 
        attributes.put("00002a19-0000-1000-8000-00805f9b34fb", "Battery Level"); 
        attributes.put("00002a1c-0000-1000-8000-00805f9b34fb", "Temperature Measurement"); 
        attributes.put("00002a1d-0000-1000-8000-00805f9b34fb", "Temperature Type"); 
        attributes.put("00002a1e-0000-1000-8000-00805f9b34fb", "Intermediate Temperature"); 
        attributes.put("00002a21-0000-1000-8000-00805f9b34fb", "Measurement Interval"); 
        attributes.put("00002a22-0000-1000-8000-00805f9b34fb", "Boot Keyboard Input Report"); 
        attributes.put("00002a23-0000-1000-8000-00805f9b34fb", "System ID"); 
        attributes.put("00002a24-0000-1000-8000-00805f9b34fb", "Model Number String"); 
        attributes.put("00002a25-0000-1000-8000-00805f9b34fb", "Serial Number String"); 
        attributes.put("00002a26-0000-1000-8000-00805f9b34fb", "Firmware Revision String"); 
        attributes.put("00002a27-0000-1000-8000-00805f9b34fb", "Hardware Revision String"); 
        attributes.put("00002a28-0000-1000-8000-00805f9b34fb", "Software Revision String"); 
        attributes.put("00002a29-0000-1000-8000-00805f9b34fb", "Manufacturer Name String"); 
        attributes.put("00002a2a-0000-1000-8000-00805f9b34fb", "IEEE 11073-20601 Regulatory Certification Data List"); 
        attributes.put("00002a2b-0000-1000-8000-00805f9b34fb", "Current Time"); 
        attributes.put("00002a31-0000-1000-8000-00805f9b34fb", "Scan Refresh"); 
        attributes.put("00002a32-0000-1000-8000-00805f9b34fb", "Boot Keyboard Output Report"); 
        attributes.put("00002a33-0000-1000-8000-00805f9b34fb", "Boot Mouse Input Report"); 
        attributes.put("00002a34-0000-1000-8000-00805f9b34fb", "Glucose Measurement Context"); 
        attributes.put("00002a35-0000-1000-8000-00805f9b34fb", "Blood Pressure Measurement"); 
        attributes.put("00002a36-0000-1000-8000-00805f9b34fb", "Intermediate Cuff Pressure"); 
        attributes.put("00002a37-0000-1000-8000-00805f9b34fb", "Heart Rate Measurement"); 
        attributes.put("00002a38-0000-1000-8000-00805f9b34fb", "Body Sensor Location"); 
        attributes.put("00002a39-0000-1000-8000-00805f9b34fb", "Heart Rate Control Point"); 
        attributes.put("00002a3e-0000-1000-8000-00805f9b34fb", "Network Availability"); 
        attributes.put("00002a3f-0000-1000-8000-00805f9b34fb", "Alert Status"); 
        attributes.put("00002a40-0000-1000-8000-00805f9b34fb", "Ringer Control Point"); 
        attributes.put("00002a41-0000-1000-8000-00805f9b34fb", "Ringer Setting"); 
        attributes.put("00002a42-0000-1000-8000-00805f9b34fb", "Alert Category ID Bit Mask"); 
        attributes.put("00002a43-0000-1000-8000-00805f9b34fb", "Alert Category ID"); 
        attributes.put("00002a44-0000-1000-8000-00805f9b34fb", "Alert Notification Control Point"); 
        attributes.put("00002a45-0000-1000-8000-00805f9b34fb", "Unread Alert Status"); 
        attributes.put("00002a46-0000-1000-8000-00805f9b34fb", "New Alert"); 
        attributes.put("00002a47-0000-1000-8000-00805f9b34fb", "Supported New Alert Category"); 
        attributes.put("00002a48-0000-1000-8000-00805f9b34fb", "Supported Unread Alert Category"); 
        attributes.put("00002a49-0000-1000-8000-00805f9b34fb", "Blood Pressure Feature"); 
        attributes.put("00002a4a-0000-1000-8000-00805f9b34fb", "HID Information"); 
        attributes.put("00002a4b-0000-1000-8000-00805f9b34fb", "Report Map"); 
        attributes.put("00002a4c-0000-1000-8000-00805f9b34fb", "HID Control Point"); 
        attributes.put("00002a4d-0000-1000-8000-00805f9b34fb", "Report"); 
        attributes.put("00002a4e-0000-1000-8000-00805f9b34fb", "Protocol Mode"); 
        attributes.put("00002a4f-0000-1000-8000-00805f9b34fb", "Scan Interval Window"); 
        attributes.put("00002a50-0000-1000-8000-00805f9b34fb", "PnP ID"); 
        attributes.put("00002a51-0000-1000-8000-00805f9b34fb", "Glucose Feature"); 
        attributes.put("00002a52-0000-1000-8000-00805f9b34fb", "Record Access Control Point"); 
        attributes.put("00002a53-0000-1000-8000-00805f9b34fb", "RSC Measurement"); 
        attributes.put("00002a54-0000-1000-8000-00805f9b34fb", "RSC Feature"); 
        attributes.put("00002a55-0000-1000-8000-00805f9b34fb", "SC Control Point"); 
        attributes.put("00002a5b-0000-1000-8000-00805f9b34fb", "CSC Measurement"); 
        attributes.put("00002a5c-0000-1000-8000-00805f9b34fb", "CSC Feature"); 
        attributes.put("00002a5d-0000-1000-8000-00805f9b34fb", "Sensor Location"); 
        attributes.put("00002a63-0000-1000-8000-00805f9b34fb", "Cycling Power Measurement"); 
        attributes.put("00002a64-0000-1000-8000-00805f9b34fb", "Cycling Power Vector"); 
        attributes.put("00002a65-0000-1000-8000-00805f9b34fb", "Cycling Power Feature"); 
        attributes.put("00002a66-0000-1000-8000-00805f9b34fb", "Cycling Power Control Point"); 
        attributes.put("00002a67-0000-1000-8000-00805f9b34fb", "Location and Speed"); 
        attributes.put("00002a68-0000-1000-8000-00805f9b34fb", "Navigation"); 
        attributes.put("00002a69-0000-1000-8000-00805f9b34fb", "Position Quality"); 
        attributes.put("00002a6a-0000-1000-8000-00805f9b34fb", "LN Feature"); 
        attributes.put("00002a6b-0000-1000-8000-00805f9b34fb", "LN Control Point");