Base(2B)Xbee->Rover(lite)Xbee NO RTK

Q&A forumCategory: QuestionsBase(2B)Xbee->Rover(lite)Xbee NO RTK
ich48397 asked 4 months ago

I am no good at english.
I am trying to connect RTK  without NTRIP server, Xbee  on a RTMC3 trafer from SimpleRTK2B to Xbee  on a SimpleRTK2lite.
But  Both boards NO RTK LED are lighting.

I could conect the  NTRIP server conenction truogh internet  with this IP67 kit 
I will test Local RTK  trough Xbee trasfer  ,
Please advice me to set   optimal  F9P configuration.

Ardusimple Staff replied 4 months ago

Checklist:
1. Did you check our configuration page? Try to load base and rover configuration files: https://www.ardusimple.com/configuration-files/
2. After powering the base station, base station should not move
3. Both units should have good sky view
4. XBee. Did you buy Xbee from ArduSimple? Then it should be plug and play. If you are using a 3rd party Xbee, make sure its configured at 115’200bps.

5 Answers
ich48397 answered 4 months ago

I can RTK  trough Xbee transfer.
Another Way ,Xbee(router) on the USB-Serial module for Xbee  then Xbee TX->SimpleRTK2lite Xbeeconenctor TX,and GND.
RTCM LED lighting  ,but RTK LED lighting.
My Xbee config is 115200bps ,hardwareFlow(RTS,CTS On).for data loss.
I think SimpleRTK2lite not apply XbeeHardWare Flow.
My eperiment photo is Here.https://00m.in/oFwXn
Why RTCM reciebing OK but  No RTK LED is still lighting?
best regards 

Ardusimple Staff replied 4 months ago

A few comments on you last message:
– Disable flow control, our products don’t use flow control. Try again with flow control disabled.
– How do you know “RTCM receiving” ? Do you check message ubx-rxm-rtcm ?

ich48397 answered 4 months ago

Thank you quick response.
I  watched ubx-rxm-rtcm ,this screen shot  upload to my blog  https://00m.in/oFwXn
And LED NO RTK ligting, RTCm blinking photo  upload.
Xbee CTS,RTS setting   is  a method for data loss  between  Coordinator to Router  ,
then SimpleRTK2B need not adaption to  Flow control,but CTS,RTS pin level is important,Ithink.

regards
 

Ardusimple Staff replied 4 months ago

Interesting. Some things that could go wrong:
– Signal strenght. How strong are signals on base and rover.
– Satellites in view. Do you see enough satellites? For the zed-f9p to show DGPS it needs a minimum number of satellites (we don’t know which is this number).

We can check above if you can take a screenshot of ubx-nav-sig on both base and rover.

ich48397 answered 3 months ago

Thank you for your valueable advice
I have benn checking  the NO RTK issue ,RTCM3 code  1005  is missing.though configured MSG F5-05.
I think that  My BASE accuracy is  not enough  for RTK.      https://00m.in/O4r7M
I will use RTK2GO to recieve nearest NTRIP site.
About Xbee conection, DIGI  default stting is CTS ON RTS OFF ,this setting can connect  to lite  with loaded  Xbee.
But CTS ON& RTS ON  setting do not connect on lite.
I think  CTS ON can  protect  data losses in 115200bps between coordinator-router.
These issue is  with DIGI spec ,SimpleRTK2 is anrelated.
 
 
 

Ardusimple Staff replied 3 months ago

that’s good news, thanks for the update.

Try to set realistic target accuracies for the base survey-in, and don’t move the antenna at all when the base is powered. We use 2.5m target accuracy and it takes 5 minutes in good sky conditions.

ich48397 answered 3 months ago

Thank you

I suppose ,Survey in 2.5m accuracy is allowed  with Moving Base  mode?
IMy purupose of RTK Is Ski Turning  Analysys,that need not absolute position,relative position .
Please how to configure and setting ,for IP67 kit and  Xbee S2Cs.
 

Ardusimple Staff replied 3 months ago

I’m confused. Survey 2.5m is only for static base station.
For moving base station, you don’t set survey target accuracy.

Default configuration files are available here: https://www.ardusimple.com/configuration-files/

ich48397 answered 3 months ago

Thank you  and sorry my confusing question.
I did a Moving Base experiment ,to learn the ublox documents.
Results are upload my Blog ,
https://00m.in/uPmem

After all,Antena position in  my home garden is not good at RTK.

Then I will use  the Softbank RTK   Service in Japan ,that Softbank  LTE station in japan had RTK Base stations,10-20km distance.
ALES coorp,https://ales-corp.co.jp/service/

regards