private static int unsignedBytesToInt(byte b0, byte b1) {
        return (unsignedByteToInt(b0) + (unsignedByteToInt(b1) << 8));
    }
Convert signed bytes to a 16-bit unsigned int.
rxandroidble/src/main/java/com/polidea/rxandroidble2/helpers/ValueInterpreter.java