Enable GPS message NAV_VELNED using c++

Hi i would like to enable the NAV_VELNED message in order to read velocity data from GPS but i’m not able to enable it.
I am trying to use the code provided by Emlid to enable NAV_POSLLH and i’ve done something like this:

int Ublox::enableNAV_VELNED()
    unsigned char gps_nav_status[] = {0xb5, 0x62, 0x06, 0x01, 0x12, 0x00, 0x01, 0x12, 0x01, 0x70, 0x2A};
    int gps_nav_status_length = (sizeof(gps_nav_status)/sizeof(*gps_nav_status));
    unsigned char from_gps_data_nav[gps_nav_status_length];

    return SPIdev::transfer(spi_device_name.c_str(), gps_nav_status, from_gps_data_nav, gps_nav_status_length, 200000);

I think the the HEX code for the NAV_VELNED is wrong. How can i find the last 2 bytes related to the checksum? Thank you!

Hi @srp,

I see that Lars has shared his part of the code with you in the other thread. Please check this out:

Thanks. Unfortunately it doesn’t seem to work for me

Oh, I see. I can hardly help with the custom code but hopefully, the additional comments from Lars will help to shed some light on this.

This topic was automatically closed 100 days after the last reply. New replies are no longer allowed.