I have a trimble r8-4 for a rover a trimble netr9 for network ntrip base and a trimble TSC3 access 2017 using my cell for network access. I have a GPR unit that has a serial input so after starting the Trimble system in style RTK-log the base and rover are working together but the nmea that was flowing out the serial port of the R8-4 stops. So the GPR gets no input. If I disconnect the Data collector and just use the R8 static the nmea works again. I tried connecting the cable from the TSC3 to the GPR but no data comes out the serial port. Any suggestions? Thanks
Turns out to get an RTK session to be active and at the same time have NMEA output to a 3rd source (GPR) I have to start the RTK operation on my TSC3 or Yuma2 and then with another device (laptop or other trimble tablet) log into the R8-4 web page and reset all the i/o outputs all over again to what I want like nmea to the number 2 serial port. I do not know why Trimble has to undo all settings on the receiver when a new session is started.
I have no valuable input, but just wanted to say 'what a cool use of RTK'. Thanks for piquing the interest.
@Bryce Might want to check your RTK survey style.
Your version of Access is pretty old now, and I'm not sure if this would apply to you, but for the latest releases at least
There is a page in the survey style for NMEA outputs which configures the NMEA messages, the rate and the receiver serial port settings.
You may have no messages selected or the rate set to 'off'
Yes I have it in the survey style but it does not do the nmea once the TSC3 makes it's connection to the receiver the bluetooth port changes over to gsof and that wipes out my nmea. I am stuck on access 2017 because I have some programs and special locators that use access 2017 only
Ok I am a little confused
On which port are you expecting the NMEA?
GSOF over the bluetooth would be what I would expect with a connection.
The survey style should be able to start NMEA on the receiver's serial port which would be connected to the GPR by cable.
Is this your setup?
I do know Trimble have made recent changes to Access to make it easier to run two bluetooth ports (controller and nmea) - but unfortunately that wont apply for you
Bluetooth is just the connection the TSC3 makes to the R8, the serial port rs232 is nmea output. And the survey styles have nmea enabled . It is when the survey controller makes it's initial connection to do RTK then it changes my settings.
Access wants full control of a receiver - I would expect it to stop any existing outputs.
But once the RTK survey gets started and has a fixed position it should start pushing NMEA on the serial port.
Sounds like this is not happening - are you sure you have the NMEA strings and port configured correctly in the survey style?
yes it is configured correctly, I get nmea string messages up until I start the rtk survey on the controller and yes it gets a fixed rtk position but no output unless I open a new connection to the R8-4's web page and then set the out put ports again. Thanks
Is it at all possible to use a null modem cable with a splitter. R8 - to GPR and TSC3 - R8. This cuts out BT all together,
@gisjoel that is the problem right there, no output at the serial port it .
Hi Bryce,
I get your stuck with Access 2017 (a limitation on your WM based controller, the TSC3).
You'll have to cut out Bluetooth altogether, hence my suggestion for a splitter cable to feed both TSC3 and your device. Your boot on the underside of the TSC3, I assume has both a serial port and USB?
You'll have to jerry rig a way to receive the augmentation stream (RTK) from the Rover NOT using Bluetooth.
Have you tried a USB to Serial RS232 Converter Cable attached to your TSC3?