Harry Phillips

I'm not able to work on this right now, but unless anyone else is working on this, I'm planning to tackle this next.

@padcom I plan to do it, but it's quite complex and I don't understand the STM32's DMA architecture well enough at the moment. I've written an implementation for ESP32 so...

That's strange, in the Kotlin rewrite it looks like this: https://github.com/harry1453/android-bluetooth-serial/blob/a2075b9444dae1ed6b934d23da78262d48bfb994/androidBluetoothSerial/src/main/java/com/harrysoft/androidbluetoothserial/BluetoothManager.kt#L78 And is quite clearly nullable.

The problem is that I haven't released the current master branch, which contains a fix for this problem: [a method to directly access the OutputStream](https://github.com/harry1453/android-bluetooth-serial/blob/master/androidBluetoothSerial/src/main/java/com/harrysoft/androidbluetoothserial/BluetoothSerialDevice.kt#L29) so you can handle input...

Can you verify with, say, a Windows PC or other app/device that the data is actually being transmitted?

Could you check what message is being sent? The library [expects](https://github.com/harry1453/android-bluetooth-serial/blob/master/androidBluetoothSerial/src/main/java/com/harrysoft/androidbluetoothserial/BluetoothSerialDeviceImpl.kt#L45) messages to be delimited by a newline (`\n`) character. If you want a different delimiter, you need to use...

@johnchtsai Please can you do the same as I said above? If you are just transmitting a data stream, you need to use the [`outputStream`](https://github.com/harry1453/android-bluetooth-serial/blob/37b324f0cbe57a67e15dcb1c0cdfcce6b9b9a22b/androidBluetoothSerial/src/main/java/com/harrysoft/androidbluetoothserial/BluetoothSerialDevice.kt#L29) property to get a raw...

You need to be using the [latest snapshot](https://jitpack.io/#harry1453/android-bluetooth-serial/master-SNAPSHOT) and then use the [`outputStream`](https://github.com/harry1453/android-bluetooth-serial/blob/37b324f0cbe57a67e15dcb1c0cdfcce6b9b9a22b/androidBluetoothSerial/src/main/java/com/harrysoft/androidbluetoothserial/BluetoothSerialDevice.kt#L29) property to get a raw data stream. Does this answer your question?

@sufiaji Sorry I didn't see this issue got opened! That is very strange and even stranger is that the stacktrace does not run through your app or the library at...

@Anyeos Hi! Sorry for the slow response also. The library only supports regular bluetooth devices, not BLE I'm afraid. They work completely differently and the Serial devices eg. HC-06 are...