nrf_socket og nrf_close

[Tron]

When I have opened a nrf socket with nrf_socket to extract GPS data, when the GPS acquisition phase is over, I want to close the socket, since I'm turning the GPS off. calling nrfclose with the socket handle as input parameter,, returns -1, normally an indication that somthing has gone wrong. When I try to reopen the socket again, the open socket command also fails. Please advice on how to proceed.  

[Hakon]

Hello, can you please provide the code so I can debug it?

[Tron]

bool gpsPower(bool state) {
    char response[80];
    u16_t fix_retry = 0;
    int modemResult;
    u16_t fix_interval = 1;
    u16_t nmea_mask = NRF_CONFIG_NMEA_GSV_MASK |
                      NRF_CONFIG_NMEA_GSA_MASK |
                      NRF_CONFIG_NMEA_GLL_MASK |
                      NRF_CONFIG_NMEA_GGA_MASK |
                      NRF_CONFIG_NMEA_RMC_MASK;

    int retval = modem_at_open_socket();
    if (retval < 0) {
        printk("opening AT socket failed\n");
        return false;
    }
    modemSetState(MODEM_FLIGHT_MODE);

    modemResult = modem_at_command(state ? AT_GPS_ON : AT_LTE_ON, response);
    printk("Modem result %s: %d\n", state ? AT_GPS_ON : AT_LTE_ON, modemResult);

    modemSetState(MODEM_ON);
    setLNAState(state);
    modem_at_close_socket();

    if (state) {
        fd = nrf_socket(NRF_AF_LOCAL, NRF_SOCK_DGRAM, NRF_PROTO_GNSS);

        if (fd >= 0) {
            printk(" Socket created \n");
        } else {
            printk("Could not init socket (err: %d ) \n", fd);
            return false;
        }

        retval = nrf_setsockopt(fd,
            NRF_SOL_GNSS,
            NRF_SO_GNSS_FIX_RETRY,
            &fix_retry,
            sizeof(uint16_t));

        if (retval != 0) {
            printk("Failed to set fix retry value \n");
            return false;
        }

        retval = nrf_setsockopt(fd,
            NRF_SOL_GNSS,
            NRF_SO_GNSS_FIX_INTERVAL,
            &fix_interval,
            sizeof(uint16_t));

        if (retval != 0) {
            printk("Failed to set fix interval value \n");
            return false;
        }

        retval = nrf_setsockopt(fd,
            NRF_SOL_GNSS,
            NRF_SO_GNSS_NMEA_MASK,
            &nmea_mask,
            sizeof(uint16_t));

        if (retval != 0) {
            printk("Failed to set nmea mask\n");
            return false;
        }

        retval = nrf_setsockopt(fd,
            NRF_SOL_GNSS,
            NRF_SO_GNSS_START,
            NULL,
            0);

        if (retval != 0) {
            printk("Failed to start GPS \n");
            return false;
        }
    } else {
        modemResult = close(fd);
        printk("socket_close result: %d\n", modemResult);
    }
    printk("GNSS %s ok\n", state ? "ON" : "OFF");
    return true;
}

THis is my gps power on/off code. 

It is basically built on the gps sample code. 

THe code is running on a custom board, with a low noise amplifier. 

The following code is not attached: 

modemSetState(int mode) - sends the AT+CFUN=mode to the modem

I have the following extra definitions: 

#define AT_LTE_ON "AT\%XSYSTEMMODE=1,0,0,1"
#define AT_GPS_ON "AT\%XSYSTEMMODE=0,0,1,0"

Opening the socket goes well the first time around, but closing it and reopening it returns -1, indicating that something is wrong. 

Tron