Ble advertising service uuid android You just have to click Recently, I was simulating a BLE device using Android. Bluetooth 5 advertising extension. Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company Use Standard UUID when implementing standard services and characteristics. UUID class BluetoothLEManager(private val context: Context) { private In my app , i am passng the UUID number of the hearing aid service as in the BLE sample from google i. The method . Please read the following link and figure out how BLE advertising packets are structured. implementing BLE app without knowing UUIDS. : the first segment of uuid: 00001800-0000-1000-8000-00805f9b34fb is 00001800 which is the Generic Access service (org. However, I know my heart rate peripheral is working and advertising correctly because the heart rate service is discovered (and readable) by I want to connect two android phones having low energy Bluetooth therefor I have created a Characteristic UUID within a service UUID. You are right, and this is already a good start. After adding required flags and data there will be around 21 bytes left to insert When sending an advertising packet in bluetooth LE, inside the PDU it is possible to add different type of data. Have a look at the links below that show how this is used:-How to advertise Android as a BLE peripheral; Sample Bluetooth LE GATT server; BLE: send data to iOS from Android Scan Response. Thus, don't expect to see all the service UUIDs). The full 128-bit value of a 16-bit or 32-bit UUID may be computed by a simple arithmetic operation. The flags are: LE Limited Discoverable Mode, LE General Discoverable Mode, BR/EDR Not Supported Advertising. – Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company Contribute to SpeastTV/BLE-Payloads development by creating an account on GitHub. Is it more clear However dont put that X value too low, as you must take into account that you still lose alot of advertisement packets on android LE scan, compared to a BLE scan on i. What is UUID used for? Should different BLE peripherals have different UUID? What is unique ID for a BLE peripheral device, as identifiable by some other central BLE device? Say for example, how do location finding apps on Android detect a peripheral BLE device? some of the service UUIDs can be listed in an advertising packet, so no two-way gatt（汎用アトリビュート・プロファイル） belコネクション上でのデータ転送手順とフォーマットを既定するもの The device is intended to connect to arbitrary consumer smartphones (therefore mostly Android and iOS). If we both have iPhones and scan the same peripheral, we'll see different UUIDs. Example on scan: @Override public void startScan(final BleDeviceScanCallback callback) { mCallback = callback; I want to change my android device's Bluetooth UUID to a predefined value so that my BLE beacon can recognize it without pairing with it. service. advertisement and scan response data in BLE. Before we begin Scope Topics that will be covered include: Before we begin Necessary equipment and software Necessary prior knowledge Some basic theory The Generic Attribute Profile (GATT) Services Characteristics Universally Unique ID (UUID) One of my Samsung devices returns UUID perfectly that I added while advertising my service, while another device shows different UUID. addServiceData(new ParcelUuid(SERVICE_UUID), serviceData) . Advertising Interval: self-explanatory. SERVICE BLE Advertising is a critical part of the Bluetooth Low Energy protocl and udnerstanding it is critical to your product's success. We use a 16-bit service UUID and plan to advertise the related data via the advertising data type 0x16 (Service Data - 16 bit UUID). This page lists various types of BLE advertising data: Advertising & Talent Reach devs & technologists worldwide about your product, My UUID for the service is: "f3641400-00b0-4240-ba50-05ca45bf8abc" My UUID for the characteristic is: "f3641401-00b0-4240-ba50-05ca45bf8abc" Android BLE Gatt Server with multiple services - onCharacteristicWriteRequest() no char for handle This tutorial can be seen as the combined version of the BLE Advertising / Services We need to replace the BLE_UUID_DEVICE_INFORMATION_SERVICE with the CUSTOM_SERVICE_UUID we defined in ble_cus. Service Solicitation: used to “invite” centrals that expose one or more of the specified All the others such as device name, 128 uuid , TX power can be filled up at the scan response payload. While I was able to successfully create the BLE device, there was a lot of learning. The other is via an Arduino BLE server with a custom UUID for it's service. You can use startScan (List<ScanFilter> filters, ScanSettings settings, ScanCallback callback) method inside class BluetoothLeScanner. 128-bit UUID = 16-bit Attribute UUID * 2^96 + Bluetooth_Base_UUID with Bluetooth_Base_UUID being 00000000-0000-1000-8000-00805F9B34FB. I have use AdvertiseData and AdverstiseSettings classes to generate the advertise packet. 8. The heart rate service is 0x180D. 1 "Searching for Services / UUID" will explain how to calculate the UUID. The advantages of adding a local name to the advertising packet is that it's easy to find using an iOS or Android BLE app. The different BLE advertising data types are: Service UUID: used to include a list of Service UUIDs; Local Name: the device name (either Shortened or Complete) Flags: one-bit flags that are included when an There is no predefined method to convert UUIDs to their respective service name. Skip to content. fromString(CONFIG_UUID )); Flutter Blue ScanResult embeds all what you need in an easily interpretable form:. BluetoothGattService import android. How to decode the BLE advertisement data. . And the default advertising interval is between 20ms to 600ms, which totally can't accept in my case. After adding required flags and data there will be around 21 bytes left to insert The adopted profiles / services / characteristics / descriptors use 16-bit UUIDs as seen on the official site. Another pitfall is, that on the receiving side the serviceData key is a 32 bit uuid instead of a 128bit. Or, to put it more simply, the 16-bit Attribute UUID replaces the x’s in the follow- ing: I'm performing a UUID filtered scan on Android (mobile device A) and I have two test cases. I have seen some beacons using this type of data. Now, CoreBluetooth (compared to Android) does not seem to have any API for custom advertisement data except for advertising a GATT service UUID. The page you linked to has the numbers in the table. Paulw11, I added a new device in my iOS app, and I created service UUID and characteristic UUID for the new device. The Ble packet is of limited size i. fromString("0000180F-0000-1000-8000-00805f9b34fb"); private static final UUID BLE obtain uuid encoded in advertising packet Here is his code snipet: //For APIs greater than 21, Returns Device UUID public String getUUID(ScanResult result){ String UUIDx = UUID . Android BLE services onServiceDiscover() is not being called. I have a custom BLE peripheral that advertises data like this: In other words, my BLE peripheral advertises a service UUID associated with a unique identifier in advertised service data, but it does not add that service UUID to advertised service list because if I do that, I don't have room in the BLE frame to add battery level when I need to. Instead, the local cached copy of the service UUIDs are returned. The following code snippet is an implementation example of onLeScan method. 0 supports Bluetooth 5, which provides broadcasting improvements and flexible data advertisement for BLE. I solved the problem by including a serviceData on the advertising data. e has a 2 byte header and a variable payload of 6–37 bytes. When looking at the advertising data in e. However the size of the ScanResponseData cannot exceed 31 Bytes. All of Eddystone data is contained in the Bluetooth 4. Without using the ble_advertising module (reduce the RAM / FLASH size usage), we can directly call the softdevice In this tutorial, you will learn about the BluetoothLeAdvertiser class, which enables developers to turn a supported phone into a Bluetooth LE beacon without the need for additional hardware. I have to send some advertise data via ble to an iOS central app. Please guide me that how can I accomplish the task. Then you can try again startLeScan (UUID[],callback). class ServiceList (*, standard_services: List [int], vendor_services: List [int]) If you've got a health thermometer you could use the service 0x1809. Use the BluetoothLeScanner instead. If you are not a member but need your custom advertising data format, you can use a custom 128-bit GATT service UUID and use the Service Data advertising type, which however takes up more bytes. after connect discoverServices() is also called but services are not discovered i. service or employer brand; OverflowAI GenAI features for Teams; import java. Battery service is 0x180F. js via Bluetooth LE in three main ways: Ble is advertising AdvertiseData added in BluetoothGattServer and advertise is done and device get connected. LeScanCallback callback) is working fine. Android BLE // Using custom service UUID. build(); Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company In the advertisement setup you can add additional data to a service uuid, just add a call to addServiceData() in the building of the ScanResponseData. For Android scan, we are filtering BLE device by MAC addresses. AdvertiseData advertiseData = new AdvertiseData. iOS generates the UUID on the device and hides the MAC address. The 16-bit UUIDs are shortcuts for a corresponding 128-bit UUID and is translated as. 2". 0), of which 6 are reserved for the device's public or randomized address. In the onScanResult callback, you can access the advertising data via: // assuming `result` is the ScanResult passed to the `onScanResult` callback byte[] rawData = result Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; BLE Advertisement in Android. The "serviceDataUuid" is 16-bit only. battery_service, 0x180F): [LE]> primary attr handle: 0x0001, Sequence-like object of Service UUID objects. Instead he tries to use service UUID and characteristic UUID, I set for another device. toString(); return UUIDx; } Advertising & Talent Reach devs & technologists worldwide about your product, Service uuid: 00001800-0000-1000-8000-00805f9b34fb I/PSoCCapSenseLedService: **LEO LAS 3 CARACTERISTICAS DE android. 1 Ble Android Advertising There are other types of BLE advertising data, such as: Service UUID: used to include a list of Service UUIDs; Local Name: the device name (either Shortened or Complete) Flags: one-bit flags that are included when an advertising packet is connectable. How can I achieve this change of UUID via my app? OR How do I coonect BLE device through service UUID? I want to connect Bluetooth device through GATT over Bluetooth classic. But for Mobile Apps, the name isn't necessarily unique enough. It stores both standard and vendor UUIDs. – I wish to know if there is any way we can determine the actual service UUID being advertised from the data in 'overflow' area. BLE scan filter by Service Data UUID. One uses an app called BLE Scanner on another Android device (mobile device b) to create a BLE server with two test Services (each with their own unique UUID). LeScanCallback callback) method while startLeScan(BluetoothAdapter. Designing BLE Advertising packets is a critical step in building robust and reliable Bluetooth LE products. Log import java. 5. 0 ("Low Energy," "BLE") advertising packet, so no need for BluetoothGatt or BluetoothGap. So basically i can't use a 16 bits UUID for defining my service, but i can't filter my services with Android for a 128 bits UUID. You use that number because the spec says that is what it is. setIncludeTxPowerLevel(true). 0x06 Incomplete List of 128-bit Services: UUIDs of the services provided by the peripheral can be I am working on Android BLE as a peripheral connected to a custom device that runs Nordic NRF51 as a central. Android 8. Indeed the iOS MAC-> UUID Issue is a long standing one (and with search you'll see a number of threads on the issue). BLE Advertising with Node. When i use filter to scan specific serviceUUIDs , the callback is not executing. Have a look at the UUID Generator Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company Visit the blog I'm attempting to build multiple BLE services for my Android peripheral (Fossil Watch), Adding two full 128 bit service uuids is too much for an advertisement. Else you could run into “Legacy advertising data too big Im using a galaxy S4 running android 4. Due to the limited payload of the Advertising particular on the 128-bit UUID, you can choose to use scan responses. setIncludeDeviceName(true) . I had succeed by this method to discovery thermometer device with specific UUID[0x1809] Android BLE : Retrieve service UUID in onLeScan() callback when advertised from iOS Peripheral. First, I try to set the service UUID and service data by using AdvertiseData object, then advertise it. . Navigation Menu Toggle navigation. Because we need more flexibility, we want to filter by UUID. Can android do it? i confirm it by log the device that show uuid of 00001808-0000-1000-8000-00805f9b34fb. public void onLeScan( This field is encoded inside a BLE manufacturer advertisement. Next, save the 128-bit UUID as a string in strings. The issue is, the Service UUId in BLE GATT that I receive in my android is the longer UUID (i. A GATT Service UUID is a lower-level BLE concept that represents a particular functionsl service a BLE peripheral performs The second code example in the question shows how to use Android's built in BlE APIs to find a device advertising a 128-bit GATT Service UUID. extend (services: Iterable [Service]) → None Appends all services in the iterable to the list. Due to the limited size of the advertising PDU, we'd like to avoid any additional advertising data, most While this utility creates a 128-bit UUID, the Android system only uses 16-bit UUIDs for advertisement and will automatically adjust a 128-bit UUID to conform. The advertisement packet has 31 data bytes available for you to use. When creating a AdvertiseData object, it will fail if you add both your device name and service uuid in your packet because it is bigger than the maximum size of the AdvertiseData limits. Even though there are two service UUIDs defined in the test_service_uuid128 array, none of them is advertised. The AD structure format is described in "11 ADVERTISING AND SCAN RESPONSE DATA FORMAT" of "Bluetooth Core Specification 4. BLESSED, a Bluetooth Low Energy (BLE) library for Android - weliem/blessed-android. The UUID gets repeated twice, which would require 32 bytes. Airpods. You can add service, control advertising and deal with requests from remote centrals, The output of primary is telling you which services your device supports, e. iOS documentation states that when an app is advertising as BLE peripheral in background, another iOS app can find it by explicitly specifying the service UUIDs to scan for. You can use Bluetooth LE Advertising to broadcast data packages to all nearby devices without having to establish a connection first. Devices such as healthcare sensors can provide a service, substituting the first eight digits with a predefined code. From this question I gathered that I'll have to change the service UUID but I can't find the relevant documents or tutorials. 2. If you use a 128-bit UUID, that's 16 bytes per UUID. addServiceData extracts silently a 16-bit UUID from a given 128-bit UUID, if the UUID is from the Bluetooth SIG. BluetoothGattCharacteristic import android. UUID; public class MainActivity extends AppCompatActivity { private BluetoothLeScanner You need add service UUID in the advertisement data as the link. 4) doesn't support the 128 bits UUID. In the example above, the 16-bit UUID would be 950D. The standard defines a basic BASE_UUID: 00000000-0000-1000-8000-00805F9B34FB. Standard There are advertisement types for service uuids, but not for characteristics specified by the standard. But if you've got a couple sensors in your application the best thing you could do is build your own custom servive with your own 128 Bit UUID. 0. 0x2A37 is the UUID for the Heart Rate Measurement characteristic. The advertising data space is limited, and it's not mandatory to include all the service uuids there. LightBlue on iOS, there are no services Does anyone know how to discover a BLE Service by UUID in Android? There is a discoverServices() method in Android, but there seems to be no way to discover one individual Service instead of all of them. generic_access, 0x1800). See the list of adopted specs. When I try to connect to the device, device doesn't recognize his service UUID and characteristic UUID and cannot connect. bluez. Set the service UUID in the ScanFilter to display specific BLE devices according to UUIDs. 0 My BLE BLE works mostly like dictionary where you look up long numbers (characteristics) and get binary data, so without prior information about the device you're working on, there is not much you can see when you discover services. The remote BLE device that you discovered might include some of the Service UUID data (The UUID can be 2 bytes or 8 bytes. The different BLE advertising data types are: Service UUID: used to include a list of Service UUIDs; Local Name: the device name (either Shortened or Complete) Flags: one-bit flags that are included when an advertising packet is connectable. I am working with android BLE (Bluetooth Low Energy). 3. toByteArray(Charsets. Playstore (Android): nRF Connect Android Advertising data. In fact, BLE devices may advertise (tough it is not mandatory) one primary service UUID, either a long one (128 bit, custom service) or a short one (16 bit, standard service). A list of available Service UUIDs may be included as part of this advertisement (among other pieces of data). When use ConnectGatt(Context, Boolean, BluetoothGattCallback), the gatt. I am developing and app to Send BLE Advertisement packet in android. There are also some projects on Github that provide an easy to parse UUID list like the bluetooth-numbers-database. apply { addServiceData( ParcelUuid(MY_SERVICE_UUID), byteArrayData ) } You can store the UUID on the phone, but it will be unique to that phone. Builder(). Bear in mind that there's a strict limit of 31 bytes of Designing BLE Advertising packets is a critical step in building robust and reliable Bluetooth LE products. Advertising & Talent Reach devs & technologists worldwide about your product, (SENSOR_SERVICE_UUID)). You would have to write it yourself. In my experiment, I'm trying to replicate the beacon like in the above picture by using Android BLE library and using iBeacon protocol, since the detection device claims that it follows iBeacon protocol. ADPayloadParser in nv-bluetooth parses the payload of an advertising packet and returns a list of AD structures. In Part B, covering the Service Discovery Protocol (SDP) under Chapter 2. The output of primary does not list the Battery Service (org. since Android 5. xml. You'll have to use smaller uuids and make your own custom advertise I am developing an application where I have to connect to Bluetooth device on Android 4. 3 - Core System. UTF_8) var data = AdvertiseData. For now, I am checking characteristics inside service if service UUID doesn't match but surprisingly all the characteristics are inside this service. JavaDoc of getUuids() method says as follows: This method does not start a service discovery procedure to retrieve the UUIDs from the remote device. content. 1. Ask Question Asked 7 years, (Constants. Advertising. You will also learn how to Bluetooth LE devices transmit advertisement packets to notify nearby devices of their presence. AdvertisementData provides even more details regarding the transmission power level, Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company If you use the app nRF Connect (or any other BLE debug app), you can see the full advertisement data. Context import android. 3. I am having trouble in scanning BLE device using startLeScan(UUID[] serviceUuids, BluetoothAdapter. One phone will advertise the service uuid and the other one phone will scan for the service uuid but, I don't know how to advertise the service uuid. This is intended so that the Central device can easily sort out the Android 8. js/Python/C#/Android. When developing your custom service and attributes, reusing existing UUIDs (or part of UUIDs) from code you may find in example code, vendor SDKs, or anywhere else is not a good idea. My software can find my devices and GATT service, but couldn't find any characteristic in my services. It doesn't work on Xiaomi MI A1 (Android 9) and Huawei P10 (Android Adds the service UUID; Adds a mapping of service UUID to the data; The data in an advertising packet is limited to 37 bytes (Bluetooth 4. My code works fine only with Xiaomi MI9 (Android 9). 0 start to support the peripheral device which allow apps to broadcast advertisements. On Android peripheral side, when i create advertise i do: var byteArrayData = dataToSend. After switching to ConnectGatt(Context, Boolean, BluetoothGattCallback, BluetoothTransports) with the The UUID is used for uniquely identifying information. getServiceUUIDs() returns null). The code roughly looks like this: I've been playing with the GATT server example lately and noticed that it looks like the service UUID is not advertised, even though it should. discovering BLE services. This can be found in the Bluetooth 4. Then you could build some characteristics for that service that fit best for your application. getCharacteristic( UUID. And it seems that current version of Android (4. e BLE Advertisement Data can hold up to 31 bytes data. This element and 32BIT_SERVICE_UUID_COMPLETE I'm frustrated by my BLE scan returning no GATT Service UUIDs (i. Bluetooth 5 supports BLE Physical Layers (PHYs) that retain the reduced power consumption of Bluetooth 4. It is the vendor's choice to The other way is to connect a target beacon and explicitly require information about service UUIDs supported by the beacon. getScanRecord(). And I want to get the battery level by using Battery_Service and Battery_Level. nameUUIDFromBytes(result. You can find a list of assigned 16-bit UUIDs containing the Bluetooth SIG member UUIDs and the GATT Service UUIDs here. It identifies a particular service provided by a Bluetooth device. 9 List BLE devices Android - Kotlin. Service DATA: UUID FE2C; DATA 0003F0; Tx Power Level; Service UUID FE2C; 🍎 Apple. g. append (service: Service) → None Append a service to the list. Usually if you know what services are supported, you should be able to assume the characteristics too since each service's specification document should contain that info. 0 Core spec Vol. GetService(UUID) always returns null in the OnServicesDiscovered() callback. Using the AndroidBLE Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company All short UUID (16 bits) are reserved pending future revisions of the BT services specs. If you are advertising a full service UUID like I did for a legacy advertising mode, then the phone name needs to be 8 characters or less. What you will need to read is the battery level characteristic which is 0x2A19. then base of this answer How can I convert a Bluetooth 16 bit service UUID into a 128 bit UUID? i know how to read that 16bit uuid to 4 digit like this. It works fine. the scanRecord. I have a Xamarin application needs to connect to a dual mode Bluetooth device (Classic & BLE) over the BLE connection. Scanning for BLE peripherals with a scan filter based on advertised service UUID. 2 and let users choose increased bandwidth or range. util. The issue is that I register my services / characteristics with some UUID, and those are not the displayed ones, I don't understand why Android BLE services onServiceDiscover() is not being called. e. public class BluetoothLeService extends Service { private static final UUID Battery_Service_UUID = UUID. I am having trouble developing android software for my BLE device. Let's go over what you can do and what's best Platforms Per the attached image from the android nRF Connect app, I am trying to access service data UUID 0x181A for this BLE thermometer/humidity device. 0000a00-0000-1000-8000-00805f9b34fb But the getservice returns null means that the service I'm using noble in my app, which scans for BLE devices. In my app case, I need broadcast every 20ms to 30ms,but I can't find anyway to change the advertising interval. Some of them are the service data types, which Data Type Value are: 0x16 Service Data - 16-bit UUID 0x20 Service Data - 32-bit UUID 0x21 Service Data - 128-bit UUID. Service_UUID,BluetoothGattService. bluetooth. From your custom UUID = CDB7950D-73F1-4D4D-8E47-C090502DBD63, you must create a 16-bit UUID which is within the address range of the Bluetooth SIG. class ScanResult { final BluetoothDevice device; final AdvertisementData advertisementData; final int rssi; } You can find the BLE ID, Bluetooth name and some other values in the BluetoothDevice object. addServiceUuid(new ParcelUuid(SERVICE_UUID)). In Bluetooth, discovering all Services takes a 'long' time, whereas discovering individual Services based on UUID does not take as long. Never use Bluetooth Base-UUID based UUIDs for custom purposes. Adds the service UUID; Adds a mapping of service UUID to the data; The data in an advertising packet is limited to 37 bytes (Bluetooth 4. Android is advertising two different Advertisement UUIDs one for left and other for right Nordic NRF51 devices. Is there any way to make it possible to contain both device name and service uuid in a advertise data? I know iOS can do this. 3 My intention is to start the service as soon as the application launch, and connect to the first BLE device discovered (presuming the user is in a "clean" enviroment) can you please tell me what should be the right flow (pseudo code?) since to my understanding I need to start discover and upon a discover (meaning I have the device Advertising & Talent Reach devs & technologists worldwide about your product, is turned off and back on again in guise B, on connection and discovering services, the app still 'discovers' the A service UUID, and not B. getBytes()). You can communicate with Puck. BluetoothGattService@1b31ffb* E/OnServicesDiscovered: Service characteristic: 00002a00-0000-1000-8000-00805f9b34fb . That said, in the BLE docs, there is a method displayGattServices() which puts the discovered services info in an JavaScript on a Microcontroller. h as well as replace BLE_UUID_TYPE_BLE with BLE_UUID_TYPE_VENDOR_BEGIN since this is a 128-bit vendor specific UUID and not a 16 Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company A final note on the processing of the received data: in most cases the data is not of values in a single byte but of a byte array structure with flags that need to get checked, so it is important And yes, if you want your device to be found by other observers/scanners, then you should first use LeAdvertiser in order to send out BLE adverts. The project requires Android peripheral to connect to two NRF51 central devices. Bluetooth 5 supports BLE Physical Layers (PHYs) that Slave Connection Interval Range: a way to communicate the Peripheral’s preferred connection interval range in advertising packets. android-library ble bluetooth-low-energy advertising beacon eddystone-eid eddystone-uid eddystone-url eddystone-beacons eid-beacon eddystone-gatt broadcast-bluetooth-beacons gatt-service Resources Readme We have devices that beacon data with «Service Data - 128-bit UUID» AD type : 0x21. vhv twkt nsuj ewy eglm comu dwhx qrrcsuz jkxjsda ogmp