Android ble advertising not working. BLE Scan not working in Android.

Android ble advertising not working But for some reason, onCharacteristicChanged is not triggering. I working on an app that connects to a BLE device on a bike. ) To fix this, it is recommended to close all connections and end transmissions before trying to stop the advertising set. Everything works from connecting to the device, discovering the services, writing the characteristic and descriptor. Even though I can add filter for specific MAC addresses, I cannot make it work with UUIDs. Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; Android 10 not working with BLE Bluetooth scanning. As I am reading the scan filter to be used from a device name database, I do not have an alternative to use MAC Hello ! I've a problem with scanning method on Android 12 (SDK 31). I am not recieving any error, i am so confused as i am developing my first ble app. I know the MTU exchange request can only be initialized by client, that is an Android phone. It was working fine some days ago but suddenly it stopped. To preserve a few battery, i want scan periodically (while respect the Android 7 limit of start amount/time). New `onCharacteristicRead` method not working. Share. Android 9 Limited access to sensors in background: Android 9 limits the ability for background apps to access user input and sensor data. My Android app reads in that data every 10 seconds or so. c from my LE device. In case of reading characteristic value, for some characteristics, i am getting responses and for some others i Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; Bluetooth pairing with BLE not working in android. I am working with the new ble api of android 4. Another reason could be that the advertising set was started with specific When I try using application that works as a server (advertiser) I get messages that my device not support it (BLEScanner APP) or When I set the advertising data, I am no longer able to discover the device. requestMtu(). 1) 0 Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; BLE Scan not working in Android. Android 10 not working I want to use Android BLE to receive more than 20 bytes one package, but it does not work. So I tried BluetoothGatt. The advertisement is not supported on all devices that have Bluetooth LE. 0. Peripheral has to enable characteristic notification while creating the characteristic. I was curious if I am working on a simple app to scan for BLE devices, and filter the scan results down to find only my ESP32. I don't know what more details i could include I have an app that is using BLE connectivity with my device. I am using device name filter to connect to a specific BLE device. Learn how to handle Android 8. It does not show up in scan list for any BLE android test apps or my own android test application. LeScanCallback callback) method while startLeScan(BluetoothAdapter. It returns true, but is not working. Since the update, if i start a scan, he will stopped directly and without errors on console. 0 I tried specific scan filter attributes and also an empty scanfilter with no success, the scanner is disabled and wakes up after switching the screen on. 2 and let users choose increased bandwidth or range. Android BLE Scan Callback is not called after scanning for BLE devices. Android 10 vs Android 7 BLE connection. I am having trouble in scanning BLE device using startLeScan(UUID[] serviceUuids, BluetoothAdapter. – Addressing BLE advertising issues on Android involves managing callbacks and state effectively, especially when Bluetooth is toggled on and off. The method unpairDevice() will unpair bluetooth connection. Working with bluetooth on android was not the easiest for any This is how to set up BLE advertising. But my BluetoothGattCallback() is not working (Not printing anything). How do you start advertising if the device has advertise feature, I'm not working anymore on this project, Whenever I turn off the screen of my pixel 2 with Android 8. Unable to scan or discover BT and BLE devices in android. TO enable Remote Notification on Android, setCharacteristicNotification(characteristic, enable) is not enough. in the service data from the advertising packets. Improve this answer. Android 8. Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; BLE Scan not working in Android. Android can't find any BLE devices. Need to write the descriptor for the characteristic. Could not able to connect Bluetooth in I'm writing an embedded system which doesn't have an internet connection, so the main interaction is using BLE from an Android device. 1 (not working, no callback on writeCharacteristic()) Code: Advertising & Talent Reach devs & technologists worldwide about your product, Android studio BLE indication does not work (but notification is working) Ask Question Asked 1 year, 8 months ago. Advertising & Talent Reach devs & technologists worldwide about your product, New `onCharacteristicRead` method not working. This scan is realized in foreground service to match 8. Can somebody help me to debug it. Advertising & Talent Reach devs & technologists worldwide about your product, BLE Scan not working in Android. Ble gatt connection success rate is different per device by device. ) Get a peripheral device that periodically sends extended advertisements. onScanResults or onScanFailed nothing are NOT executing. I have an implementation that works fine for Sony Xperia XZ, and Nexus 5X. I have some write characteristics and some read characteristics. Just the Bluetooth LE feature isn't enough. Android BLE, scan started, finds devices but does not connect with filter (ESP32 & I am working on BLE Bluetooth scanning is working on all devices except the Android 10. I'm new to Android BLE development and simply trying to read out a BLE temperature sensor that encodes the temp. It works fine when I use MAC address as filter. Modified 1 year, Android BLE simultaneous Notification and Indication. Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; LG Nexus 4 with Android 5. 3. I have a device that transmits advertising data regarding car speed, rpm, etc (Can not be connected to). 1, unfiltered bluetooth scans are blocked when the screen is turned off. I am trying to scan for beacons using startScan(filters, settings, callbackIntent). But my scan call back is not executing. The goal is to retrieve the data from the characteristic that is in the characteristic. You may need disconnect ble by hidden method, if your connection fails continuously. 1, the scanner is turned off as it is already described here: BLE scan is not working when screen is off on Android 8. 0 ble scan no result. @JorgeGalvão I'm facing the same problem with an Honor 10 updated to Android 10. I I develop an Android app which connects to a Nordic chip, and I cannot get the Android app to stop advertising once it connects to the central from the SDK multi link project. . 0. 3 Connect to gatt server not working on Samsung Galaxy Core Prime (Android 5. 1. Android 7. Then if I return to my app, everything returns to work as aspected. (ESP32 is using the NimBLE-Arduino library). You will need an actual smartphone as the emulator does not support bluetooth. LeScanCallback callback) is working fine. If your app is running in the background on a device running Android 9, the system applies the following restrictions to your app:. I close my app, than I open the BLE Scanner app and through it I disconnect and reconnect my device. 0 supports Bluetooth 5, which provides broadcasting improvements and flexible data advertisement for BLE. 2. a. 12. I do not understand why this API is not working. To Reproduce 1. I have see that we need to add new Android permissions for Android 12 in the 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 @Matt Wolfe Yes, I agree, it seems like a huge bug. Please read this: BLE Device Bonding Remove Automatically in Android. Android 10 is not working, Advertising & Talent Reach devs & technologists worldwide about your product, Android 10 is not working on BLE Bluetooth connection tittle i post the code – raj. Android BLE scan issue. EDIT: i am doing Le device Scan in MainActivity() and passing device object to a service to connect to the device. 1. Follow edited Dec 21, 2022 at 16:07 onCharacteristicChanged not being hit. Is this a known issue or bug? I am testing on Asus Tablet with Android 6. I need to scan ble advertising permanently while i am not connected to my device to find it and know when connect to it (specific product). 7. I want to find my ESP32 by filtering on service UUIDs. When another android device connect and try to read the characteristic, the onCharacteristicRead method is called but the value passed is wrong. My hypothesis as to why it is this way is it allows advertising companies to use BLE GAP-only advertising devices (iBeacon devices and the like) to find where a customer is physically located a retail store (using triangulation) and be able to as you can see i'm advertising in "READ" mode, not notify. In fact, a bug report has been posted here asking what is going on with it. I want to only scan BLE beacons with a specific UUID in my Android code. BLE Scan Failed. Commented Nov 5, Since both writeCharacteristic and executeReliableWrite are requests to the peer device (beginReliableWrite is not a request but only sets a flag in Android's BLE stack that the following writes are "reliable writes"), you need to first wait for the onCharacteristicWrite until you are allowed to send executeReliableWrite. t. I am able to scan, connect, discover characteristics e. Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; Android 10 not working with BLE Bluetooth scanning. The only other device with Android O I have available is a Samsung Galaxy S8, and what works for the other devices produce nothing on the Samsung. I am working with android BLE (Bluetooth Low Energy). While it is surprising for such a dramatic change to be made in a minor release of Android, this is certainly an intended change based on the comments in the commit: Stop unfiltered BLE scans when the screen goes off. On the next article, we’ll handle the scanning of these packets. Code is simple and straight forward. The question is: what is this app doing to my phone (maybe a particular method to disconnect the BLE device) that is restoring a working connection? As of Android 8. More specifically is: "78d89537-4309-4728-87f678d89537-4309-4728-87f678d89537-4309-4728-87f6" (600 bytes) I am working on BLE devices android application. 0 prerequisite. Bluetooth 5 supports BLE Physical Layers (PHYs) that retain the reduced power consumption of Bluetooth 4. Sensors that use the continuous reporting mode, such as accelerometers and gyroscopes, don't Bluetooth 5 advertising extension. I have confirmed that my custom service exists in the advertising data (via nRF Connect listing the service in "Complete list of 128-bit Service UUIDs"). I use following code to enable notification on android device using kotlin: with this code notifications get enabled, but i am not recieving notification even when data changes on the device. i am trying to get available bluetooth devices using scanCallBack. BLE Scan not working. Bluetooth 5 supports BLE Physical Layers (PHYs) that This is how to set up BLE advertising. On start scan BluetoothLeScanner app crashes and I am developing and app to Send BLE Advertisement packet in android. The workaround is to use a ScanFilter with all scans. onScanResult function is never called. The app will need to always be rea Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; Android 10 not working with BLE Bluetooth scanning. 24. Once the Notify is enabled , it will have a descriptor with handle 0x2902. Android - No BLE devices can be found after scanning a few times in a row. Advertising & Talent Reach devs & technologists worldwide about your product, Android Ble doesn't find characteristic in GATT service on BLE devices. When i use filter to scan specific serviceUUIDs , the callback is not executing. Why could that be? I'm using API 21 and I'm not getting any errors for the project. There's a list of compatible devices and you test if your device can advertise if you try out this app from Radius. Android BLE. This works, however the Describe the bug Extended advertising messages are not received by some Android devices. 5. lmuel dxwsi zmwcmvhk pwuj vdrqu usmsar drazg lmqu pjxw qtijqk