Debug Mode - Display GPS Location/Status

[LeeLeahy2]

Display GPS Location and Status via Serial

Please add an entry to the serial debug menu to display the GPS location and status

• Longitude
• Latitude
• Altitude
• Accuracy
• Satellite Count
• Locked
• State
• etc.

Use Case

• RTK Express used as a remote base station connected through serial to another networked computer (PC, Raspberry Pi, ESP32, etc.). Enable remote access to GPS location and status via serial.

[nseidle]

Hi LeeLeahy2 - Adding lat/long/stats to the debug menu is a fine idea, and I'll get it added. But I don't think it solves your issue. If you want GPS location via serial, you should really be monitoring the NMEA strings coming out of the u-blox connection. You can use u-center to configure the messages that are output over the u-blox USB connection. Avoid v2 of u-center for now as it doesn't yet support the ZED-F9P. u-center v1 is for windows, looks like it will work in Wine as well.

Please see formatting below of the lat/long/stats in the debug menu. It's wide, but workable. Let me know what you think and I'll get it into the next release candidate.

[LeeLeahy2]

Hi Nathan - I like the header to the debug menu with longitude and latitude. My original thought was to add an item to the debug menu, say #9, 'g' or 's'. The the menu item could display one or more lines duplicating what is available on the display:

• GPS locked or searching
• Resolution? e.g. 1.5 m
• Survey In mode / versus locked
• Number of satellites
• Battery level
• MAC address
• etc. Personally, I would move the Ellipsoid, Mean Sea Level and Accuracy into the debug menu item, mainly because I don't understand these values yet. For the single line, I would display Altitude above mean sea level, and point or survey accuracy (the value on the front panel, smaller is better).

[nseidle]

Resolution? e.g. 1.5 m

I think you mean horizontal positional accuracy. This is the number on the screen and is captured by 'Accuracy' above.

MAC address

It's easy enough and I don't mean to be rude, but why do you need this? For your reference, the last four digits of the Bluetooth MAC address are shown at the top of the main menu:

I get you want to remote access to the system status over serial. Rather than trying to parse each of these bits from various spots, why don't we elect a special character (~ for example) that once received, causes the system to output all its stats via comma delimited string. For example we could do:

$GNTXT,data/time,mac,lat,log,hpa,system state,batt level, ... *4B (CRC)

A very long sentence. It would be terminated with a CRC so yes, it's a NMEA sentence, but this would allow you to write a simple parser.

[LeeLeahy2]

HI Nathan,

If in your example ~ would toggle the output on and off, that would be great. Let me confirm that this would be output via the Config ESP32 port.

I was originally thinking that this output would be a one shot, print it and done. However, your suggestion would allow the computer to parse and display this data on a regular basis and effectively duplicate the RTK Express display. That sounds great.

On Mon, Mar 14, 2022 at 12:02 PM Nathan Seidle @.***> wrote:

Resolution? e.g. 1.5 m

I think you mean horizontal positional accuracy. This is the number on the screen and is captured by 'Accuracy' above.

MAC address

It's easy enough and I don't mean to be rude, but why do you need this? For your reference, the last four digits of the Bluetooth MAC address are shown at the top of the main menu:

[image: image] https://user-images.githubusercontent.com/117102/158267047-2fa1f07d-e9c7-4bc4-816b-ee690445b89c.png

I get you want to remote access to the system status over serial. Rather than trying to parse each of these bits from various spots, why don't we elect a special character (~ for example) that once received, causes the system to output all its stats via comma delimited string. For example we could do:

$GNTXT,data/time,mac,lat,log,hpa,system state,batt level, ... *4B (CRC)

A very long sentence. It would be terminated with a CRC so yes, it's a NMEA sentence, but this would allow you to write a simple parser.

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[nseidle]

This is coming along nicely. Is this output helpful?

01,01,05, are header bytes.

    char systemStatus[100];
    sprintf(systemStatus, "%02d%02d%02d.%02d,%02d%02d%02d,%0.3f,%d,%0.9f,%0.9f,%0.2f,%d,%d,%d",
            hour, minute, second, mseconds,
            day, month, year,
            f_accuracy, siv,
            d_lat, d_lon,
            f_msl,
            fixType, rtkSolution,
            battLevel
            );

Hello from a mile above sea level!

[nseidle]

This technically violates the maximum length of 82 characters for a NMEA sentence but since this isn't being recorded to a log file, we should be ok.

[nseidle]

The ~ command has been implemented in RCApr1 and beyond. Please give it a try and let me know if there is other information that should be contained in the message.

[nseidle]

Featured added and rolled into v1.11 release.

[LeeLeahy2]

Hi Nathan,

This looks good. My only suggestion would be to display year, month and day before the hour minute... As a single value it is monotonically increasing until 2300.

Lee Leahy (808) 692-3394

On Wed, Mar 30, 2022 at 5:01 PM Nathan Seidle @.***> wrote:

This is coming along nicely. Is this output helpful?

01,01,05, are header bytes.

[image: image] https://user-images.githubusercontent.com/117102/160967454-53142651-7a52-44fe-8bab-51f391b0dcac.png

char systemStatus[100];
sprintf(systemStatus, "%02d%02d%02d.%02d,%02d%02d%02d,%0.3f,%d,%0.9f,%0.9f,%0.2f,%d,%d,%d",
        hour, minute, second, mseconds,
        day, month, year,
        f_accuracy, siv,
        d_lat, d_lon,
        f_msl,
        fixType, rtkSolution,
        battLevel
        );

Hello from a mile above sea level!

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