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Jasonchenlijian / FastBle

Android Bluetooth Low Energy (BLE) Fast Development Framework. It uses simple ways to filter, scan, connect, read ,write, notify, readRssi, setMTU, and multiConnection.
Apache License 2.0
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Ble devices are getting disconnected within 3-4 sec after connection. #493

Open pritam2102 opened 3 years ago

pritam2102 commented 3 years ago

Hi,

We are facing some issues between our ble devices (ble version 5) and android mobiles using FastBle library.

We are able to connect our devices with mobile phones like samsung, redmi note 8 pro, redmi not 5 pro and other mobiles.

But when we are trying to connect same devices with mobiles like redmi note 8, redmi note 9 pro max and oppo A53. it is getting disconnected within 3-4 sec with gatt timeout error 8.

After tracing bluetooth snoop log we can see below error. Attribute not found bluetooth_hci_log { 13274 12783.807351 controller host HCI_EVT 8 Rcvd Number of Completed Packets 13275 12783.808066 remote () XiaomiCo_de:0a:37 (Redmi note 9 pro max) L2CAP 497 Rcvd Connection oriented channel 13276 12783.837010 Microchi_95:fc:5a (Endocare) XiaomiCo_de:0a:37 (Redmi note 9 pro max) ATT 74 Rcvd Read By Type Response, Attribute List Length: 3, Unknown, Unknown, Unknown 13277 12783.839225 XiaomiCo_de:0a:37 (Redmi note 9 pro max) Microchi_95:fc:5a (Endocare) ATT 16 Sent Read By Type Request, GATT Characteristic Declaration, Handles: 0x0057..0x0058 13278 12783.842390 controller host HCI_EVT 8 Rcvd Number of Completed Packets 13279 12783.858398 Microchi_95:fc:5a (Endocare) XiaomiCo_de:0a:37 (Redmi note 9 pro max) ATT 14 Rcvd Error Response - Attribute Not Found, Handle: 0x0057 (Unknown: Unknown) }

We have already tried changing connection parameters like interval, latency and timeout but no luck.

We have attached screen shot of hci snoop log file.

Please suggest on this.

kingiis commented 3 years ago

我把链接用的东西都放在application里 当onDestroy()不用蓝牙时

BleManager.getInstance().disconnect(MainApplication.deivce) MainApplication.GATT.disconnect() MainApplication.GATT = null MainApplication.UUID_SERVICE = null MainApplication.UUID_WRITE = null MainApplication.UUID_NOTIFY = null

希望对你有帮助

pritam2102 commented 3 years ago

Thank You, I tried but not working.

Jasonchenlijian commented 3 years ago

It's about your device. Some devices will automatically disconnect within a few seconds if they do not communicate after a successful connection.