processor

Processor

A Processor adds the ability to process (and optionally modify) GATT data pre-write or post-read.

class SecureProcessor : Processor {

    override fun readCharacteristic(characteristic: BluetoothGattCharacteristic, value: ByteArray): ByteArray {
        // todo: decrypt `value` to `newValue`
        return newValue
    }

    override fun writeCharacteristic(
        characteristic: BluetoothGattCharacteristic,
        value: ByteArray,
        writeType: WriteType
    ): ByteArray {
        // todo: encrypt `value` to `newValue`
        return newValue
    }

    override fun writeDescriptor(descriptor: BluetoothGattDescriptor, value: ByteArray): ByteArray {
        // todo: encrypt `value` to `newValue`
        return newValue
    }
}

val gatt = device
    .connectGattOrThrow(context)
    .withProcessors(SecureProcessor(), LoggingProcessor())

Setup

Gradle

repositories {
    jcenter() // or mavenCentral()
}

dependencies {
    implementation "com.juul.able:processor:$version"
}