Deere Mobile / mRTK RTCM corrections

So as an avid user of AgOpenGPS in both tractors for many years, it pains me to make this topic, but needs must…

I run a Deere Combine with integrated autosteer / yield monitoring etc, I would be lost without the yield monitor and obviously the autotrac, I have always just used it on SF1 as is all thats been required for steering a combine etc.

However due to new issues with 4/5g mobile signals interfearing with the SF1 correction freq, this is now a problem… Now I could convert the entire machine to also steer on AOG, but this seems alot of hassle given its ready to go as is, and id still need the greenstar signal for the yield monitor…

So I have now got a SF3000 reciever, which is SF2 Ready and RTK unlocked, and has a mrtk / mobile RTK subscription on it… My understanding was that I could then input normal RTCM correction via the serial input (the one the deere radios use pin 8?) and would be good to go on RTK using my existing base station (RTKbase / SNIP) that I use for my AOG setups…

However all I can achieve is the kb’s increasing in the SF300 config page, but no RTK fix. Has anyone else personally got an RTK setup working with mobile RTK on a deere setup WITHOUT using a john deere 4g modem? If so, could you share any information? As I cant seem to make it work, have compared messages to other jdmrtk bases and I think I am using the correct ones…

Am wondering if the official Deere mobile RTK modems handshake with the reciever and unless you have this, it simply dosnt work, but have read threads online wher people talk about using 3rd party recievers so I assumed this would be possible…

Have got mobile rtk set to “RTCM”, have got serial settings matching both sides, kb’s increase when i turn it on, but just EGNOS signal / no change…

Thanks!

If you figure it out, let us know for sure. This is of interest to me.

Pretty sure the Deere monitor can do mapping and yield monitoring with GPS from any source over serial. So you should be able to setup AOG to do the steering, and feed GPS into the Deere monitor for everything else. As far as I’m aware, only Autotrac requires a genuine Deere receiver.

Another alternative is to sell the SF3000 (should fetch a decent price with those unlocks) and buy the Agra-GPS CRG receiver, which will talk to your RTCM base station just fine, and provide RTK for AutoTrac. Been using two of these receivers for a couple of years now on my Deere autotrac machines and am happy with them.

It is a long shot, but there are multiple rtcm messages that are proprietary. Your system may be looking for a specific message or even a specific version of rtcm. Is it possible to sniff the messages that work?

Yeah this is the main thing I would like to know / wonder… But i dont know what it require / demands…

Have you read here yet?

I’ve started experimenting with RTKonnect to inject NTRIP corrections to various brands. Haven’t looked at Deere yet.

You’ll want copies of BNC and SNIP demo to tinker with. I’ve been down this path trying to get AgLeader Paradyme working and figured out my NTRIP source wasn’t including some of the legacy messages. SNIP demo can show you what is already in the message tream and can recreate several legacy messages that might be necessary.

Yes have read that thread, but no joy with just those messages sadly…

I have monitored some other mount points that are apparently used with JD recievers, and as far as I can see I am sending the same messages, but I think i must be doing something wrong…

Can sending to many message also be an issue?

I see you have an mRTK unlock on the SF3000 receiver ?

Have you tried connecting to deere’s nearest mRTK NTRIP server using SNIP to see if you can get a list of messages being sent ?

Disregard. Just had a quick look at it needs embedded login details. Likely the SF3000 serial number plus What messages is it outputting?

This cable is to connect an external receiver to a John Deere monitor via Serial? In the photo you can see the pins for COM1 or COM2

PF90363


this help?
GS2 Third Party Controller Harness Kit - GS2ThirdPartyControllerHarnessPF90363kit.pdf (406.1 KB)