Tizen Developers

You may try using Accessory SDK. It'll provide you the facility to send battery status data from your paired mobile device via provider android app to consumer tizen web app. Please go through the samples attached with sdk.

KJ - thanks for your response and your suggestion for the Accessory SDK.  I did read through the Accessory SDK materials including the API reference and programming guide.  I have to admit, its still not all that clear to me... but it sounds like this SDK would be useful if I want to create my own service to run, say, on the smartphone and then consume that service by the smartwatch and have both the service and consuming app exchange data as needed.  Further, its sounds like (although I didn't see it explicitly stated) that this SDK is based on the BLE and GATT - both of which I think i need to use for retrieving the paired and connected device's battery level.

However, i don't really want to require users of my watchface to download and install a companion app to the phone in order to get that phone's batterylevel.  Isn't that what the Accessory SDK would lead to or am I misunderstanding the Accessory SDK?  And am I right that this SDK uses BLE rather than "classic" bluetooth methods?

I've been somewhat successful in using classic bluetooth, but not BLE.  And unfortunately for me, every example I've found on the net uses BLE and UUIDs 180F and characteristic 2A19... but when I try using BLE and "startScan()"  i don't seem to get a response from any devices.  Yes, my samsung galaxy S3 is ancient, but still, its running android 4.3 which I understand supports BLE...yet nothing.  On the other hand, using getDefaultAdapter, "classic" bluetooth finds my devices, including my galaxy, including my pc, including an iphone5s.  Unfortunately, 180F doesn't show as one of the 16 services I discovered through this classic method.  Here's the basic code that I'm using - as you'll see, I've commented out the BLE methods b/c the onGotBTKnownDevices was never called (presuming that the startScan() never found any BLE devices...)

                try {
                    if (!bluetoothAdapter) {
            			bluetoothAdapter = tizen.bluetooth.getDefaultAdapter();
//                        bluetoothAdapter = tizen.bluetooth.getLEAdapter();
	        			
                    }
                    if (bluetoothAdapter)
	  				{
//                    	bluetoothAdapter.stopScan();
//                        bluetoothAdapter.startScan(onGotBTKnownDevices, onErrorBTKnownDevices);
                    	bluetoothAdapter.getKnownDevices(onGotBTKnownDevices, onErrorBTKnownDevices);
	  				}
                } catch (err) {
                    showMessage("ERROR: "+err, "Back", "Abort", "bluetooth");
                    writeLog("bluetooth-button click: " + err, "ERROR");
                }

...

    function onGotBTKnownDevices(devices) {
    	try 
        {
		var msg = "Bluetooth Devices found (" + devices.length + ") ",
	            devicesInfo = "";
	        bluetoothAdapter.stopDiscovery();
//	        bluetoothAdapter.stopScan();
	
            if (devices[1].isBonded && devices[1].isConnected)
	        	{	
	        	devicesInfo = getMajorDeviceClass(devices[1].deviceClass.major)+": "+devices[1].name;
        		devices[i].connectToServiceByUUID("00001101-0000-1000-8000-00805F9B34FB",
                	function (socket)
                        {
                	    try 
                            {
                		socket.onMessage = 
                                function() 
                                {
                    		    try 
                                    {
                    				var uuid = socket.uuid,
                    				   data = socket.readData();
                    	        		showMessage("Msg (1101)"+data, "Back", "Abort", "bluetooth");
                    	        		socket.close();
                    				}
                    				catch(err)
                    				{showMessage("ERROR<1101>:"+err, "Back", "Abort", "bluetooth");}
                			    };	
                			}
                			catch (err)
                			{showMessage("ERROR[1101]:"+err,"Back","Abort","bluetooth");}
    					});
	        	})
    	}
        catch....

Hi Alan Buch,

"However, i don't really want to require users of my watchface to download and install a companion app to the phone in order to get that phone's batterylevel." this line from your previous reply is making me confused. If you don't want to keep a companion app than what's the way of sending data from your phone to gear. Would you please make it clear that how battery status data will be transferred without an app in android part?

SAP provides you the facility to transfer data from android to tizen then what's the reason behind using classic bluettoth or ble instead of SAP?

Moreover, you may try this link to scan BLE devices.