Configuration Dual Antenne UM982

[PflegerE]

Hi, does anyone have a configuration for the UM982 receiver with two antennas using Teensy to connect to Ag_OpenGPS? I’m using the CanBus board from MechanikTony. What data is absolutely necessary to calculate the roll angle using the dual antennas?

[del_boy]

You’ll need the ksxt configuration for that firmware and then select F in serial monitor for gps pass through

[PflegerE]

Thanks for the heads-up. I thought I’d already entered that; I’ll check again to make sure it’s been received by AgOpenGPS.

[PflegerE]

Hello, the data from the antenna is being received correctly, but it isn’t being processed in AgopenGPS even though I’ve selected “Dual.” What other settings do I need to adjust so that the heading and roll are taken into account?

[del_boy]

Youve got a mis match on your um982 configuration
You have vtg and ksxt messages coming in.
What is your steering setup and teensy firmware?
Usually either use ksxt by itself
Or gga hpr to make paogi messages

[PflegerE]

I am using Mechanic Tony’s CAN bus board and the firmware Autosteer_AOGv5_Teensy4.1UDP_SteerReadyCAN_04.05.2024.ino.hex. I have tried everything; AgOpenGPS steers correctly when driving straight, regardless of whether GNGGA & GPVTG or PAOGI is active. However, when stationary or moving slowly during a turn, the tractor’s orientation in AOG always jumps to a heading that deviates by about 45 degrees from the actual direction. There is a fundamental error in the system. Thanks for your help.Last time, the UM982 only output GPGGA, GPVTG, and KSXT. Which data and default settings work best with AgOpenGPS? I think I have an issue with the antenna configuration (Dual/Fix); the heading isn’t being picked up—it shows “no signal.”
UM982_Settings20260808_TonyUM982.txt (670 Bytes)

[del_boy]

You dont need gga vtg and ksxt.
Im unaware of the teensy firmware supporting gga vtg paogi messages in the canbus code
So id advise to ditch them and just use ksxt and select F in serial monitor for pass through
Also from your configuration you don’t need all them messages coming in
You might also want to set com1 and com2 to the same (to save any hassle of connecting to the wrong pins)

[PflegerE]

Thanks for now – I’ll give that a go tomorrow.

[PflegerE]

It only works with KSXT; sometimes less is more. Thanks for your help.