蓝牙键盘输出中文该如何实现？

键盘输出中文，可以通过alt+（汉字对应的UTF8码）实现汉字的打印，想知道对于蓝牙键盘实现方式是否相同，对应的代码是什么样？最好能有个简单的例子说明。
以下是我尝试的几种可能的组合方式

 key_buf[0] = 0x04;
        key_buf[2] = 0x5A;
        bls_att_pushNotifyData (HID_NORMAL_KB_REPORT_INPUT_DP_H, key_buf, 8);
        while(clock_time_exceed(k_tick, 10*1000));
        key_buf[0] = 0x04;
        key_buf[2] = 0;
        bls_att_pushNotifyData (HID_NORMAL_KB_REPORT_INPUT_DP_H, key_buf, 8); //release

        while(clock_time_exceed(k_tick, 10*1000));
        key_buf[0] = 0x04;
        key_buf[3] = 0x62;
        bls_att_pushNotifyData (HID_NORMAL_KB_REPORT_INPUT_DP_H, key_buf, 8);
        while(clock_time_exceed(k_tick, 10*1000));
        key_buf[0] = 0x04;
        key_buf[3] = 0;
        bls_att_pushNotifyData (HID_NORMAL_KB_REPORT_INPUT_DP_H, key_buf, 8); //release

        while(clock_time_exceed(k_tick, 10*1000));
        key_buf[0] = 0x04;
        key_buf[4] = 0x5B;
        bls_att_pushNotifyData (HID_NORMAL_KB_REPORT_INPUT_DP_H, key_buf, 8);
        while(clock_time_exceed(k_tick, 10*1000));
        key_buf[0] = 0x04;
        key_buf[4] = 0;
        bls_att_pushNotifyData (HID_NORMAL_KB_REPORT_INPUT_DP_H, key_buf, 8); //release

        while(clock_time_exceed(k_tick, 10*1000));
        key_buf[0] = 0x04;
        key_buf[5] = 0x5A;
        bls_att_pushNotifyData (HID_NORMAL_KB_REPORT_INPUT_DP_H, key_buf, 8);
        while(clock_time_exceed(k_tick, 10*1000));
        key_buf[0] = 0x04;
        key_buf[5] = 0;
        bls_att_pushNotifyData (HID_NORMAL_KB_REPORT_INPUT_DP_H, key_buf, 8); //release

        while(clock_time_exceed(k_tick, 10*1000));
        key_buf[0] = 0x04;
        key_buf[6] = 0x62;
        bls_att_pushNotifyData (HID_NORMAL_KB_REPORT_INPUT_DP_H, key_buf, 8);
        while(clock_time_exceed(k_tick, 10*1000));
        key_buf[0] = 0x04;
        key_buf[6] = 0;
        bls_att_pushNotifyData (HID_NORMAL_KB_REPORT_INPUT_DP_H, key_buf, 8); //release

 #endif

#if 0
        key_buf[0] = 0x04;
        key_buf[2] = 0x5A;
        key_buf[3] = 0x62;
        key_buf[4] = 0x5B;
        key_buf[5] = 0x5A;
        key_buf[6] = 0x62;
        bls_att_pushNotifyData (HID_NORMAL_KB_REPORT_INPUT_DP_H, key_buf, 8);
#endif

结果都不对，我是在手机上查看打印信息的，会不会和手机键盘布局有关系？我选择的Android 键盘（英语），尝试过shif+4，打印信息为$是期望的值。

key_buf[0] = 0x04;
key_buf[2] = 0x21;
bls_att_pushNotifyData (HID_NORMAL_KB_REPORT_INPUT_DP_H, key_buf, 8);

不好意思我的C币不足，见谅！！！