SDcard replacement in RTK base
SD card is the weakest point of the RTK base station. We ship our RTK Base with industrial SD card and still failor is happens ...
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Install it & own it
No subscription fee
Free Community RTK
Right to repair
For real needs, build by farmers
Our mission is to make precision farming accessible to every fellow farmer.
I love the AgOpenGPS system because it offers more than just high-quality precision steering, it offers freedom. Thanks to its open nature, the system is fully expandable at any time, whether you are looking into section control or sprayer automation. Every feature is designed to be logical and intuitive while sitting in the cab.
This is no accident, it is developed by farmers who spend most of the year in a tractor seat, refining the system based on a decade of real-world field experience. As electronic components drop in price every year, ±2.5 cm RTK accuracy has finally become affordable for everyone.
I was raised in a farming family before pursuing a career as an engineer, where I developed large-scale telecommunication systems. Even with that background, it took me two months of trial and error to source the right components and get AgOpenGPS up and running. I founded AgOpen.shop to shorten that journey for you. We provide ready-to-use kits that take the guesswork out of building your own auto-steer system. Plus, we support a wide range of add-ons, including section control, sprayer management, and ISOBUS integration.
Every pin represents a tractor upgraded with our hardware
Technology that evolves with us, built on what we learn in the field during the season. No subscriptions, open software. Keeping you independent from dealers.
Farmer-driven development
The builders of the system spend most of the year operating tractors, the functions are developed based on this experience (typically during the winter).
Constantly evolving software
Every autumn, they dive into development with great momentum, you will often find surprisingly good and useful functions waiting for you in the new version released at the end of winter.
Precision farming features for free
Not only are the two types of headland turns and the dozens of guide lines free, but the ISOBUS implement control is also becoming increasingly perfect.
Right to repair
Our hardware is modular and easy to maintain. You own the system, so you can fix it yourself if needed. All components are available separately from wide variety of sources.
Install it yourself less than a day
Our kit includes all the components, so you can install it in just a few hours. Save on call-out and installation fees.
Community tested
The kits from our shop work on every continent. They are compatible with all tractors, combines, and self-propelled machines.
±2,5cm precision
We use the most modern RTK technology. Due to the modular design, we can integrate technological innovations very quickly.
Save Inputs & Fuel
There are no overlaps in cultivation and no gaps, so you can save a significant amount of fuel, seeds, and fertilizer.
Less tiring workday
Let the system turn the steering wheel so you can focus on the implement. Your workday will be less tiring, yet more efficient.
Most farmers believe that ±2.5 cm accuracy requires an expensive annual subscription. The truth is that in most countries, you can achieve professional-level precision for free by using community-driven RTK correction networks.
The power of NTRIP and open infrastructure
Instead of paying a dealer “GPS tax,” our hardware allows you to connect to free, community-based networks via the internet (NTRIP). These networks are built and maintained by a global community of farmers and researchers who believe precision data should be an open resource.
Is there a base station near you?
Check the live network map to see the current density of the community-led infrastructure.
Listen to the honest experiences of the farmers who actually did it
We installed it in one day following the instructional video and manual. I’m not saying it was easy, but it is definitely doable for anyone. The connectors on the wiring harness are self-explanatory. You simply cannot mix them up. Mounting and protecting the steering angle sensor is the trickiest part and requires more attention, but I think that is manageable too. It is a simple system, yet very effective.
Róbert Kohán, Farmer
“The package arrived within two days of the order, and the installation was done in a single day. The next day, we were already out in the field cultivating.”
Dániel Gojsza, MTZ-82 owner
What I really like about the system is that I have much more time to look back. I don’t have to focus on steering, so I can keep an eye on the implement. On top of that, we can work with perfect accuracy and pass-to-pass precision, whether it’s discing, mulching, or harvesting. We’ve had three tractors running this system for nearly a year and a half, and last year we started using it on our combine too.
Balázs Gunics, Farmer
Auto-steering and section control at a fraction of the cost: Even for MTZ tractors? We put the AgOpen system to the test.
Free RTK, auto-steering in one day: The AgOpen details
Yes. The software that ensures operation has been developed for nearly 10 years by farmers with excellent technical knowledge who work with tractors on a daily basis. This continuous testing and incremental development have resulted in extremely high-quality steering and features. Due to its open-source nature, the software is completely free, so the customer really only pays for the physical devices. The hardware was assembled from components with excellent price-performance ratios after much experimentation and careful selection. Although the modular design might seem like a simpler version at first glance, the system provides service of impeccable quality in practice.
Our system is based on the globally popular, open-source AgOpenGPS software. Our mission is to provide farmers with an affordable, professional precision farming tool. By scouring internet forums, anyone can put the system together, but this often involves long part hunts, soldering electronics, and crimping cables. We provide a complete hardware package pre-assembled, programmed, and tested in our workshop (a Plug & Play style kit) that you “”only”” need to install into the machine.
Absolutely! If you’re not yet ready to invest in automatic steering, the AgOpen guidance system is an excellent way to start using the system. This package provides ±2.5 cm accuracy to support manual steering. It can be expanded into a full robot steering system at any time in the future by utilizing the hardware (RTK/GPS receiver and tablet).
Our most popular package includes everything needed for immediate work: Control Box: with the latest V4.5 panel, built-in UM982 (3-band) RTK receiver, and the extremely precise TM171 tilt sensor (IMU). Wiring Harness: with connectors and built-in activation/main switch buttons. Steering Unit: available in Direct Drive or Geared versions. Wheel Angle Sensor (WAS): including mounting elements. Display: impact- and dust-resistant industrial Windows tablet (e.g., Panasonic CF-20 or Dell 7202) with a stable mounting bracket and charger.
Yes, parts can be purchased separately in the webshop (e.g., just the wiring harness, just the control box without RTK, or just the direct drive motor with an adapter). This is particularly useful if you have already built your own system but want to supplement it with a professional direct drive motor or a reliable control box.
No, not at all necessary! A great advantage of the AgOpenGPS system is its flexibility. As a cost-effective solution for a second machine, we recommend purchasing only the fixed components (wheel angle sensor, wiring harness, antenna). The more expensive components, like the tablet and the control box, can be comfortably and quickly transferred between the two machines. Moving the steering motor is a bit more cumbersome; we only recommend this transfer if it happens at most once or twice a year (e.g., at the change of seasons).
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Read moreWe are currently writing a deep dive article exploring the world of AgOpenGPS software. Learn how AgOpenGPS developed advanced visual section control and row planning features early on, rivaling many commercial solutions, and how it competes with today’s subscription based commercial software.
To ensure you select the correct adapter, the most reliable method is to remove the steering wheel and measure the diameter of the splined shaft, as shown in the image.
In most cases, the spline count is 36; therefore, the diameter is the determining factor. Based on our experience, dimensions are consistent across certain brands.
Models for which the data in the table below are highly reliable:
John Deere and newer machines from the CNH Group: A+
Claas and Massey Ferguson: N
| Adapter Model | Tractor Brands & Models | Adapters teeth no. | Adapters size |
|---|---|---|---|
|
A+ |
CNH group newer:
|
36 |
21.8-22.1 |
|
D |
|
36 |
20.4 |
|
K |
|
36 |
17.8 |
|
N |
|
36 |
15.8 |
|
B |
|
36 |
18.2 |
|
W |
|
36 |
18.5 |
|
F |
|
single key |
24.5 |
|
NH40 |
older ones:
|
40 |
17.7 |
|
T |
|
18 |
15.45 |
|
G |
RARE:
|
36 |
15.6 |
|
C |
|
single key (conical) |
23.33-25.4 |
|
BENZ- 72S |
|
72 |
23.5 |
Add an external 4G router to your kit if: