充电桩设计之4G模块获取信号强度与质量

int dx_get_lte_signalQuality(void)
{
    // char cmd[64] = {0};
    //char result[512] = {0};
    int ret = -1;
    char *pcTmp = NULL;
    char sigal[32] = {0};
    char *pcSigal = sigal;
    int rssi = 0;
    int index = 0;
    unsigned char  *cmd = at_tx_buffer;
    unsigned char *result = at_rx_buffer;
    unsigned char result_len = 0;

    // snprintf(cmd, sizeof(cmd), "AT+CSQ");
    memset(at_tx_buffer,0,UART2_TX_BUFFER_LEN);
    memset(at_rx_buffer,0,UART2_RX_BUFFER_LEN);
    snprintf((char*)at_tx_buffer,UART2_TX_BUFFER_LEN, AT_CSQ);
    ret = AT_cmd(cmd, strlen((const char*)cmd), result, &result_len);
    /*
        AT+CSQ
        +CSQ: 19,99

        OK
    */
    //  printf("AT+CSQ:\n%s\n", result);
    printf("\n result =%s\n", result);
    if (ret || !strlen((con