AgOpenGPS RTK Autosteer, How to Guide for £1000

[Rooney]

Anybody fitting hydraulic valve for autosteer on a bateman rb25 sprayer

 

[andyinv]

How are you guys bench testing your boards? I have the AIO GPS+Steering ECU V2.4 board. I flashed the teensy with firmware "autosteer_sps_teensy_v4_1.ino.hex" and have a green led, no middle led, and a red led lit. I hooked up the WAS to pins 1, 2, and 3 from the ampseal diagram but not sure if that is correct as I do not see any change via the AOG software.

I built this - takes a couple of potentiometers (one for WAS and one for pressure feedback) to test:

AgOpenGPS-Tools/AOG-TestBench at main · lansalot/AgOpenGPS-Tools

Some tools for AgOpenGPS. Contribute to lansalot/AgOpenGPS-Tools development by creating an account on GitHub.

github.com

The idea being it would be easy to hook up a small motor for testing, there's a functional CANBUS on it and it makes life simple just to hook bits up quickly and test stuff.

 

[Rooney]

I have panasonic fz g1 which doesnt seem to have ethernet port, does have usb and hdmi ports. How to i connect to agopengps box? @Andy26

 

[clbarclay]

You can get ethernet adaptors that plug into usb.

I gather a few AOG users use them with other makes of tablets which don't have ethernet port as an option.

 

[Andy26]

@Rooney as above just need a USB to Ethernet adapter.

https://www.amazon.co.uk/BENFEI-Ethernet-1000Mbps-Compatible-Aluminium/dp/B08KWC7D78/ref=sr_1_1_sspa?crid=3K1INLPVRLQWC&dib=eyJ2IjoiMSJ9.6WJ1-Ul4YCMtg-ZmX5gXTj7p0DApt6mBSewUrSZ8VNmcsAZ-wn1eakNJQgCvogVVeftKDVV36un_4-BYf0GehghQf27myry6x1ezKjkuLTI6yuPkgn8EyY7CxU-vTqOPoyLK-g_NLgpCKBD4fTrKS5XsjT-wEw_uAmTKxuD_JNWGQy9qZ3Lu16oX6OIHsPzjWO2KZledLgu6cbXxcekHTRkNBVq6d-raDxQSqzjnVBM.aZKF9T7hQV8A9BYD_l8UyWuaOph1nzri3tVESzrJzp8&dib_tag=se&keywords=usb+to+ethernet+adapter&qid=1708520484&sprefix=usb+to+etherne%2Caps%2C92&sr=8-1-spons&sp_csd=d2lkZ2V0TmFtZT1zcF9hdGY&psc=1

 

[YoungFarmer23]

Hi, I’m currently trying to test my setup on a bench and I’m having a bit of trouble with my WAS, I’m not sure it’s working properly because on AOG it’s saying it’s stuck at 30 degrees when I move it. I was wondering if anyone else has had this problem and if they could help me ?
Thank you

 

[andyinv]

Hi, I’m currently trying to test my setup on a bench and I’m having a bit of trouble with my WAS, I’m not sure it’s working properly because on AOG it’s saying it’s stuck at 30 degrees when I move it. I was wondering if anyone else has had this problem and if they could help me ?
Thank you

Some photos, and info on how you have it wired would be a good start

 

[YoungFarmer23]

Some photos, and info on how you have it wired would be a good start

Well I’ve been talking to @Andy26 about it as he made the wiring harness for me and it seems like it’s wired properly (all to the correct pins) so I‘m just a bit stumped on what it could be apart from the WAS being faulty.

 

[Andy26]

Well I’ve been talking to @Andy26 about it as he made the wiring harness for me and it seems like it’s wired properly (all to the correct pins) so I‘m just a bit stumped on what it could be apart from the WAS being faulty.

You need to check the red wire on the WAS plug is outputting 5v, if it is, then open up the PCB and put the multimeter red probe on pin 2 and black on pin 4 they're labelled on the top of the PCB.

With the wheel angle sensor arm at right angles to its plug, you should get 2.5v or -2.5v or close to that, move the arm a little and retest the voltage should vary.

 

[andyinv]

My Keya CANBUS code in action here, made it all the way over to Australia! Ryan took it and used with a UM982 instead of the usual F9P to create this, and it holds the line well eh? Can any factory system beat that?

 

[Andy26]

My Keya CANBUS code in action here, made it all the way over to Australia! Ryan took it and used with a UM982 instead of the usual F9P to create this, and it holds the line well eh? Can any factory system beat that?

Looks to be very smooth and keeping to the line very well, judging by distance off line.

4 wires, to Keya wheel that's it?

 

[andyinv]

Looks to be very smooth and keeping to the line very well, judging by distance off line.

4 wires, to Keya wheel that's it?

Yup. 2 power, 2 canbus

 

[Larel]

I think that’s the bottom end complete. Connect the terminals on the ampseal plug in the cab, fuse it up and should be ready for a trial.

 

[aidan]

You need to check the red wire on the WAS plug is outputting 5v, if it is, then open up the PCB and put the multimeter red probe on pin 2 and black on pin 4 they're labelled on the top of the PCB.

With the wheel angle sensor arm at right angles to its plug, you should get 2.5v or -2.5v or close to that, move the arm a little and retest the voltage should vary.

The WAS or wheel angle sensor that everyone uses

How come it's a sensor that feeds back voltage based on angle, industry uses 4-20 mamp

More curiosity I'm asking out of as won't be going that far with my setup

 

[andyinv]

The WAS or wheel angle sensor that everyone uses

How come it's a sensor that feeds back voltage based on angle, industry uses 4-20 mamp

More curiosity I'm asking out of as won't be going that far with my setup

Have never seen one that does current - the Claas, Case and MF ones I've looked at directly are 5V varying voltage.

 

[andyinv]

Bored today, did this: How to download AOG, configure the GPS and Teensy for your steer board, set up the network, and run AOG !

 

[Andy26]

Have never seen one that does current - the Claas, Case and MF ones I've looked at directly are 5V varying voltage.

Same all been 5V type.

I'm sure there are some that use 4-20ma.

Works great with the 5v ones and if the OEM with the biggest R and D budget is happy with 5v WAS i think that's good enough.

Current type possibly less interference and could tell you when it's fallen off.

 

[clbarclay]

Most of the rotary position sensors listed for sale from places like digi-key and mouser are analogue voltage output, but the datasheets list analogue current and PWM alternatives. They just don't stock as many of those varients as they do analogue voltage. I guess industries using analogue current output sensors generally aren't buy the odd sensor at a time from online retailers.

Analogue voltage works well enough and we have a pretty good choice different sensors readily available, including parts for cars.

 

[Northern farmer]

It isn't always obvious if the WAS has voltage or current output. Fendt has a current ouput sensor but if you measure the signal pin, you observe voltage output. That is because the receiving control box has a series resistor to ground which converts the current signal into a voltage signal.

For testing purposes one can disconnect the WAS signal wire and measure the current with a multimeter. Should give 6 mA at full left turn, 18 mA at full right turn. The signal pin connected, a multimeter in DC voltage gives 1.2 V/3.7 V respectively.

 

[Larel]

Everything is now connected up and had a play today, helped by a mate. Not steering yet, but as far as I can see I haven’t blown up anything………