Viewing Rover Observations from the Base Station

[Evan Flagg]

I've seen this question posted a few times but it doesn't seem to have been answered very thoroughly. I have been working with the Piksi Multi RTK GNSS receivers evaluation kit using the pair of freewave MM2 Series OEM Radios. My system consists of two of the Piksi Multi receivers (a base station and a rover). I have followed all of the setup guides available online and I am able to receive RTK corrections of the rover. However my application requires me to read observations from a computer at the Base station. At the moment I can see both sets of observations from the rover and base station along with the RTK-Fixed solution when I have my computer connected via ethernet to the Rover. But when I connect the computer to the base station I can only see the observations of the base station with an SBAS solution. I have checked and rechecked all my settings for the Piksi receivers and the freewave radios and I cannot figure out what needs to be done to send the observations back to the base station. 

[jsam...@pobox.com]

[I see if I do reply it does not go to everybody. So here is an attempt to fix that. I'm used to Yahoo Groups which always replies to everyone...]

We had the 2.4GHz radios. This may or may not apply to the 915MHz radios.

The standard setup tells you to set the base radio to transmit only. And it tells you to set the rover radio to receive only. This allows you to have a single base station and multiple rovers using the same correction data. (Single direction.)

If you have a single base and a single rover, you can set both radios to point-to-point mode. Then you will have bi-directional communication over the radios. This will allow the base to receive messages from the rover.

Now, the rover needs to publish the messages you want to view to the radio port. (I.e., what ever messages you are expecting at the base station.)

I'm not sure how you view the messages once they get to the base, but this will send the rover messages back to the base unit over the radio. (Maybe you would need to intercept the messages as they come out of the radio?)

But that addresses the first problem that the standard configuration will not send rover data back to the base...

PS: I have lost access to my SwiftNav Multis, so I can't test anything...

Jeff Sampson

On Thursday, March 26, 2020, 3:48:41 PM CDT, Evan Flagg <evan1...@gmail.com> wrote:

I've seen this question posted a few times but it doesn't seem to have been answered very thoroughly. I have been working with the Piksi Multi RTK GNSS receivers evaluation kit using the pair of freewave MM2 Series OEM Radios. My system consists of two of the Piksi Multi receivers (a base station and a rover). I have followed all of the setup guides available online and I am able to receive RTK corrections of the rover. However my application requires me to read observations from a computer at the Base station. At the moment I can see both sets of observations from the rover and base station along with the RTK-Fixed solution when I have my computer connected via ethernet to the Rover. But when I connect the computer to the base station I can only see the observations of the base station with an SBAS solution. I have checked and rechecked all my settings for the Piksi receivers and the freewave radios and I cannot figure out what needs to be done to send the observations back to the base station. 

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[Evan Flagg]

Thank you for the response. So I was able to successfully configure both the base station and rover radios as a PTP configuration and I now have them communicating but I am in the same position as before where I am not seeing the observations of the rover at the base station. I have enabled the same sbp messages for uart0 and uart1 on both the rover and base station and yet I still have the same results. 

I am currently using the Swift Console in order to read the observations of the receivers. Let me add that I am also using the Duro Inertial as the rover receiver if that factors into the configuration at all. Any suggestions would be greatly appreciated.

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