metawear-i2c-send-receive-command

readBtn.setOnClickListener(new View.OnClickListener() {
    @Override
    public void onClick(View v) {
        byte[] cmdGetFirmware = new byte[]{
                (byte) 0x00,
                (byte) 0x00,
                (byte) 0xff,
                (byte) 0x02,
                (byte) 0xfe,
                (byte) 0xd4,
                (byte) 0x02,
                (byte) 0x2a,
                (byte) 0x00
        };

        final byte registerAddr = 0x00;
        final byte deviceAddr = 0x24;
        final int nBytes = 7;


        String deviceAndRegister = "Device: " + String.format("0x%02X", deviceAddr) + " Register: " + String.format("0x%02X", registerAddr);
        System.out.println(deviceAndRegister);

        try {
            byte[] cmd = cmdGetFirmware;

            System.out.println("Write CMD with length: " + cmd.length);

            i2cModule.writeData(deviceAddr, registerAddr, cmd);
            Thread.sleep(500);

            System.out.println("Try to read: ");
            i2cModule.readData(deviceAddr, registerAddr, (byte) nBytes).onComplete(new CompletionHandler<byte[]>() {
                @Override
                public void success(byte[] result) {
                    System.out.println("Result: " + arrayToHexString(result));
                }
            });


        } catch (InterruptedException e) {
            e.printStackTrace();
        }
    }
});