Raspberry Pi - Python Based GPS System

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Feedbeef

New Member

• Aug 23, 2020

• #21

marklr90 said:

Yes, I think you’re approach is best. I assume you’re not using a PCB then? I think a lot of the noise users are experiencing may be due to the PCB setup where components are so close together. What version of AgopenGPS are you running?

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I am using the PCB V2, and the most recent version 4.3.10
I had a few teething problems with connection issues (loosing usb connection), but every problem i had, was easy to find advice on from the forum... I hadn't put a separate power supply in for my steering motor, so 24v was being grounded back to my PCB, instead of being on a separate relayed supply.

I think the issue people were talking of with the noise is due to how the mma (roll sensor) board attaches to the PCB. It can wobble a bit, but i just fired the glue gun up and built up a support underneath it with glue. Cant say i have had any issues with it all.

 

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hutchy143211

Member

Location

E. Yorkshire

• Aug 24, 2020

• #22

Feedbeef said:

Im using AgopenGPS in Yorkshire, Got it setup on two tractors and a base station, really impressed with it! The Ardusimple boards are great!
I used tinkerforge brick v2 for my heading
and a seperate mma8452 roll sensor.
Reading through the forums seems to be like there are more issues with dual antenna

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The ardusimple boards are really good indeed! How do you transfer your rtcm corrections from your base to the rover? I was thinking of using a base station pi running str2str up to rtk2go and then read that using str2str on the the rover pi

 

Northern farmer

Member

Location

North

• Aug 24, 2020

• #23

AgOpenGPS has an integrated NTRIP client, nothing else needed at the rover side. You would have to build something similar for your pi.

 

F

Feedbeef

New Member

• Aug 25, 2020

• #24

hutchy143211 said:

The ardusimple boards are really good indeed! How do you transfer your rtcm corrections from your base to the rover? I was thinking of using a base station pi running str2str up to rtk2go and then read that using str2str on the the rover pi

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For the base station I use the Ntrip Wifi master that ardusimple sell (you can buy an ESP32 and program this to make it cheaper) to Cast NTRIP over house wifi to RTK2go. Then I use my phone as a hotspot in the tractor.

Easy to plug in NTRIP information within Agopengps software.

 

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hutchy143211

Member

Location

E. Yorkshire

• Aug 26, 2020

• #25

May be a daft question but how do you survey in the F9P? I understand that you set it to the survey in mode and specify a time/accuracy you want to achieve, but how do you extract the base station location to then put in as fixed coordinates once complete so it doesn't need to be surveyed in again on restart?

 

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hutchy143211

Member

Location

E. Yorkshire

• Aug 26, 2020

• #26

Also how do you know when surveying in is complete? (assuming accuracy based with an unknown duration)

 

F

Feedbeef

New Member

• Aug 26, 2020

• #27

hutchy143211 said:

Also how do you know when surveying in is complete? (assuming accuracy based with an unknown duration)

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on the right hand side of the software there is a bit that will say TIME, when it is surveying in... this also shows the lat and long and the accuracy of location.
I see your in East yorkshire.... if you get a correction from a local base station (even one far away), then you can get your base location very accurately and very quickly, when surveying in.

 

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hutchy143211

Member

Location

E. Yorkshire

• Aug 27, 2020

• #28

Seem to be having some issues with rtk2go, I've got str2str sending data to my mountpoint but its not being parsed in rtk2go and the rover isn't able to receive any data from rtk2go. Any thoughts?

 

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hutchy143211

Member

Location

E. Yorkshire

• Aug 27, 2020

• #29

Just check the Pi with a local tcp connection and the rover is getting an RTK fix with the stream data that was being sent to rtk2go rtk2go seems to be recieving incoming data but it isn't being parsed for some reason. This is using only rtcm3 messages 1005, 1074, 1074, 1094, 1230.

 

Last edited: Aug 27, 2020

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hutchy143211

Member

Location

E. Yorkshire

• Sep 3, 2020

• #30

Still seem to be having issues streaming data to rtk2go. It doesn't seem to be working with str2str which is holding my progress up a bit. I've checked the base config and also the output from the second USB which is just the rtcm messages as above but to no avail. I've also tried streaming from my PC using strsvr but this also didn't work. Any ideas would be much appreciated!

 

Roderick1st

Member

• Oct 23, 2020

• #31

Hutchy,

Have you released your software anywhere. I keep thinking its a good project to get involved with seeing as JD want £8k for a basic system these days. AgOpenGPS is very good but the reliance on a full fat PC to do the work is a bit of a pain.

 

Northern farmer

Member

Location

North

• Oct 23, 2020

• #32

Nothing against Raspberry Pi (I use it for other precision ag tasks myself) but what do you mean with the full flat PC problem? If you wanted to, AgOpenGPS runs on a Windows tablet that is hardly any larger than as large a display you wanted to have.