[Bluez-users] problem reading rssi

["Loreno Oliveira" <lorenooliveira@gmail.com>]

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Hi,

I am having some headache for reading the rssi of a remote device. The code
bellow insists in returning 0 to the "rssi" variable when I try to read the
rssi of a connected Nokia 770. If I run the same code for a connected
desktop, then a non zero value is returned. For complicating even more, if I
run "hcitool clkoff <addr>" when connected to the 770, then a non zero value
is also returned.

    struct hci_conn_info_req* cr;
    bdaddr_t bdaddr;
    int8_t rssi;

    char* addr = device->client->getClientAddressAsString();
    int sockId = device->dongle->getSocketId();

    str2ba( addr, &bdaddr );

    cr = (hci_conn_info_req*)malloc(sizeof(*cr) + sizeof(struct
hci_conn_info));
    if( !cr ) {
        perror( "Can't allocate memory" );
        exit( 1 );
    }

    bacpy(&cr->bdaddr, &bdaddr);
    cr->type = ACL_LINK;
    if( ioctl( sockId, HCIGETCONNINFO, (unsigned long) cr ) < 0 ) {
        perror("Get connection info failed");
        exit(1);
    }

    if( hci_read_rssi(sockId, htobs(cr->conn_info->handle), &rssi, 1000) < 0
) {
        perror("Read RSSI failed");
        exit(1);
    }

    printf("RSSI return value: %d\n", rssi);

    free(cr);
    return (int)rssi;

Does anyone have some idea about what is going wrong here?

Loreno

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