As for most APIs, there is no word about thread safety in the Bluetooth GATT API documentation.
I have implemented a driver for the HM-10 BLE module, which is an UART adapter. It has one GATT characteristic for reading and writing data. So I get notifications about incoming data in the onCharacteristicChanged() callback function of my BluetoothGattCallback implementation. These callbacks are called from a "Binder" thread which the Android framework maintains. To write data, I need to call setValue() on the BluetoothGattCharacteristic object and call writeCharacteristic() on the BluetoothGatt instance afterwards. This is done from a thread of my app. And here is the problem: Unsurprisingly, BluetoothGattCharacteristic is not thread safe: What sometimes happens is that the Value property of my BluetoothGattCharacteristic gets overwritten during my write operation, when incoming data is received in the very same moment. Any idea how to solve this? Is it somehow possible to place the code for writing data in the same thread where the BluetoothGattCallback callbacks occur? -- You received this message because you are subscribed to the Google Groups "Android Developers" group. To post to this group, send email to [email protected] To unsubscribe from this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/android-developers?hl=en --- You received this message because you are subscribed to the Google Groups "Android Developers" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/d/optout.
