4G module IMEI of charging pile design

void dx_get_lte_imei(void)
{
    // char cmd[64] = {0};
    //char result[512] = {0};
    int ret = -1;
    char *pcTmp = NULL;
    char *pcOut = g_imei;
    unsigned char  *cmd = at_tx_buffer;
    unsigned char *result = at_rx_buffer;
    unsigned char result_len = 0;
    printf("g_imei:%s\n", g_imei);
    if (dx_check_imei(g_imei))
    {
        // snprintf(imei, imei_len, "%s", g_imei);
        printf("imei haved get ,is %s\r\n",g_imei);
        return;
    }
    memset(at_tx_buffer,0,UART2_TX_BUFFER_LEN);
    memset((char*)at_rx_buffer,0,UART2_RX_BUFFER_LEN);
    snprintf((char*)at_tx_buffer,UART2_TX_BUFFER_LEN, "%s",AT_GSN);
    ret = AT_cmd(cmd, strlen((const char*)cmd), result,&result_len);
    /*
    	AT+GSN
    	865860040521701

    	OK

    */
    printf("ret=%d \r\n", ret);
    printf("strstr(result, OK=0x%08x \r\n", (unsigned int)strstr((const char*)result, "OK"));
    printf("strstr(result, GSN=0x%08x \r\n", (unsigned int)strstr((const char*)result, "GSN"));
    /*  Filter out wrong data  */
#if 0
    //  if ((ret ==0) && strstr((const char*)result, "OK") && !strstr((const char*)result, "GSN"))
    if ((ret ==0) && strstr((const char*)result, "OK") )
    {
        // memset(result, 0, sizeof(result));
        // ret = AT_cmd(cmd, strlen(cmd), result, sizeof(result));
        printf("GSN read ok data %s----\n", result);
        printf("AT+GSN:\n%s\n", result);
        // goto out ;
    }
#endif
    if (ret ==0)
    {

        if(strstr((const char*)result, "OK") ==NULL )
        {
            // memset(result, 0, sizeof(result));
            // ret = AT_cmd(cmd, strlen(cmd), result, sizeof(result));
            printf("GSN read error data1 %s----\n", result);
            printf("AT+GSN:\n%s\n", result);
            goto out ;
        }
#if 0
        else if(!strstr((const char*)result, "GSN"))
        {
            // memset(result, 0, sizeof(result));
            // ret = AT_cmd(cmd, strlen(cmd), result, sizeof(result));
            printf("GSN read error data2 %s----\n", result);
            printf("AT+GSN:\n%s\n", result);
            goto out ;
        }
#endif
    }
    else
    {
        printf("AT+GSN fail\n");
        goto out ;
    }
    /*
    if (ret || !strlen(result) || strstr(result, "OK"))
    {
        snprintf(g_imei, sizeof(g_imei), "000000000000000");
        return;
    }
    */
    printf("\n result =%s\n", result);
    pcTmp = strchr((const char*)result, '\n');
    if (pcTmp)
    {
        pcTmp++;
        while(*pcTmp != '\r' && *pcTmp != '\n' && *pcTmp != '\0' && (*pcTmp >= '0' && *pcTmp <= '9'))
        {
            //printf("*pcTmp=%c\r\n",*pcTmp);
            *pcOut++ = *pcTmp++;
        }
    }

    if (strlen(g_imei) < 15)
    {
        snprintf(g_imei, sizeof(g_imei), "000000000000000");
        goto out ;
    }
    else
    {
        //memset(g_imei, 0, sizeof(g_imei));
        // snprintf(g_imei, sizeof(g_imei), "%s", imei);
        printf("g_imei=%s\r\n",g_imei);
    }
out:
//    memset(at_tx_buffer,0,UART2_TX_BUFFER_LEN);
//    memset(at_rx_buffer,0,UART2_RX_BUFFER_LEN);

    return;
}