I just wanted to share my experience for any Ag Leader users out there. I am feeding an Ag Leader Integra with an Ontrac2+ electric steering unit with an RS2. It took a day or two playing with settings to get things working. I’m steering now with the RS2 but I do need to be moving 2 km/h or faster to get a speed/heading rate to show up on my Ag Leader screen. For my situation this is usable, but I can see where others would need that solution sooner. My steering unit won’t engage anyway below a certain speed so it’s not a big problem for me.
The settings I used were 1 hz for GGA and VTG on the Reachview3 App at 38400 Baud Rate. This gave me a steady 5 hz rate showing on my Ag Leader Integra display for both Position Rate and Speed/Heading Rate, which is the same as when I use an Ag Leader receiver. Initially I had it set at 5 hz in the App and that was too much for the Integra computer. My Position Rate and Speed/Heading Rate on the AL display would jump all over between 0 and 20 hz in that case. It kept warning me my GGA and VTG messages were unstable set that way. Anyway, 1 hz setting worked fine for the RS2. It appears either GP or GN messages will work.
One thing that tripped me up early on was when sitting in place the AL display would not compute a position when the Ontrac2+ steering unit was active. If I switch to manual guidance (light bar), it would compute a position, but switching back to Ontrac2+ it would disappear. This was remedied by moving the tractor 2km/h or more. I do not like that anytime I stop I lose the connection to the receiver. Every time I have to hit ‘OK’ on my screen to clear the “serial connection lost” message. Once I start moving again I’m back in business and all is well.
I was cruising along from 8.5 to 10 MPH spreading fertilizer in rough no-till fields, usually 0" to 1" from my guidance line. I’ll try planting soybeans at 5-6 mph next. That will be the real test where I’m looking for RTK level accuracy. I made minimal changes to my steering settings. I feel like I’ll be able to fine tune it a little better than I could on WAAS corrections.
I am also supplying GPS to a Precision Planting 20/20 monitor for soybean planting through a splitter cable, serial to the Ag Leader, a 4 pin connection to the PP 20/20. This monitor would take 1 hz or 5 hz from the RS2 but refused to work at anything above 37800 baud. The Ag Leader would work on a higher baud but not a higher message hz rate. 37,800 and 1 hz was the compromise. It’s very satisfying to see “RTK” for fix on the PP 20/20 screen! It’s totally unnecessary to have RTK for this monitor since I’m just using it for mapping but we do run individual row clutches with a similar system on another tractor/planter combination on WAAS planting corn. If we can fix the issue of dropping the VTG messages I’d like to try it on that setup as well. RTK would be helpful there.
I am using free Ohio DOT cors for corrections. I used an old ATT hotspot with a tracfone SIM. I’ll try using the cell modem in the RS2 next. I usually received corrections on 18 satellites from ODOT. I believe they are supplying corrections now for all 4 constellations. Thank you taxpayers.