Trimble - trimble comms

[e3120]

I suppose the 500 can't do the pilot, only ez steer?

Yep, and the 750 can't do the ez-boom.

 

[Pheasant Surprise]

Well, used in earnest burning off a bit of grass this morning. A bit of cab clutter but relaxed operator.

500 controlling ez-boom; 750 driving the ez-pilot, both from single rangepoint receiver. View attachment 835768

Any particular party tricks to get it all working (smoothly)?! Come on spill the beans!

 

[e3120]

Any particular party tricks to get it all working (smoothly)?! Come on spill the beans!

Nothing smarter than what I was playing with before: Switch in serial cable to disconnect feedback once handshake completed; keep engine running!

 

[towbar]

Nothing smarter than what I was playing with before: Switch in serial cable to disconnect feedback once handshake completed; keep engine running!

Good work. So do you still use the 500 aerial on roof and just send corrections or are you sending the position data to the 500.

 

[Pheasant Surprise]

Nothing smarter than what I was playing with before: Switch in serial cable to disconnect feedback once handshake completed; keep engine running!

Ah no worries. I thought you may have done some funky stuff with a “smart” cable or intermediate box/processor to allow the handshake but then make it one way comms between the units. But a simple switch is good too!

 

[e3120]

Good work. So do you still use the 500 aerial on roof and just send corrections or are you sending the position data to the 500.

Just the one antenna, 750 sends position etc to the 500. Not the tidiest solution, but only imagine using it for grassland spraying - the 2 receivers normally live in different tractors.

 

[brentnz]

I've heard you are supposed to use a null modem cable to transmit NEMA out of the Nav serial port. Would your home made cable be causing issues?

 

[Pheasant Surprise]

I've heard you are supposed to use a null modem cable to transmit NEMA out of the Nav serial port. Would your home made cable be causing issues?

Trimble boxes of a certain vintage require TSIP to be present to handshake the comms it would seem. Unfortunately plain old NMEA won’t cut it. Closed shop mentality.

 

[towbar]

So the key question is with cheaper rtk solutions now available could we inject the corrected signal directly into the 500. It seems based on this you can just need the nmea to tsip conversion.

 

[towbar]

just started experimenting here - the ezguide doesn't allow me to configure the baud when selecting ext tsip so what did you set your 750 to when exporting the tsip? Also data settings parity and stop bits?

 

[e3120]

just started experimenting here - the ezguide doesn't allow me to configure the baud when selecting ext tsip so what did you set your 750 to when exporting the tsip? Also data settings parity and stop bits?

I honestly can't remember! Think I just selected tsip at both ends and it worked. I created a config file for the 500 when I was playing about and used it last week, but I don't think I had one on the 750, so it must have just worked. Give me a day or two and I'll have a look.

 

[Pheasant Surprise]

I honestly can't remember! Think I just selected tsip at both ends and it worked. I created a config file for the 500 when I was playing about and used it last week, but I don't think I had one on the 750, so it must have just worked. Give me a day or two and I'll have a look.

In post 3 you had port param’s set to 115,200 bps, odd parity and one stop bit.

 

[e3120]

In post 3 you had port param’s set to 115,200 bps, odd parity and one stop bit.

That was when I was blundering about in the dark, but most of it stuck. This is the setup that is working for me.

 

[towbar]

So I've tried multiple attempts sending the ezguide my own tsip messages in what I think is the correct format and sequence. Its clearly expecting a header message though with a machine identifier that it supports but i've no idea what that might be. If there is anybody here with a 750 or indeed a 252 or 262 receiver that is willing to hook it up there PC and log the tsip messages that is coming from the receiver then that would be fantastic just reach out and I can point you in the right direction.

 

[e3120]

So I've tried multiple attempts sending the ezguide my own tsip messages in what I think is the correct format and sequence. Its clearly expecting a header message though with a machine identifier that it supports but i've no idea what that might be. If there is anybody here with a 750 or indeed a 252 or 262 receiver that is willing to hook it up there PC and log the tsip messages that is coming from the receiver then that would be fantastic just reach out and I can point you in the right direction.

I'll have a go, should be the same procedure as when I was unsuccessfully trying to sniff out the vra protocols. Will pm when I get laptop rigged up.

 

[towbar]

I'll have a go, should be the same procedure as when I was unsuccessfully trying to sniff out the vra protocols. Will pm when I get laptop rigged up.

Brilliant thanks,
Realterm is a terminal emulator that will let you connect and log the data. It’s hex data so an ordinary ascii display won’t do.