Building RTK base using simpleRTK2B

Q&A forumCategory: QuestionsBuilding RTK base using simpleRTK2B
mw2.parkis asked 7 months ago

HI ArduSimple team,
I have 1 simpleRTK2B for my application. I would now build an RTK base with Long Range radio. Would you please let me know the hardware setup and the additional hardware I need. Is there any tutorial available?
Thanks,

Ardusimple Staff replied 7 months ago

You need:
1x rover LR https://www.ardusimple.com/product/simplertk2b-lr-rover-ip65/
1x radio LR for your existing board: https://www.ardusimple.com/product/radio-module-long-range/

LR radios are pre-configured, you can load our configuration files to base and rover: https://www.ardusimple.com/configuration-files/

12 Answers
mw2.parkis answered 4 months ago

Hi Ardusimple,
Thanks for your help.
Now I get the RTCM signal from TX1. As I have the 5v_out connected to the IOREF. TX2 should work and I expect the signal can go to XBEE.

  1. But there is no signal measured from UART2, would you help?
  2. I measured the path from TX2 to RX of XBEE is not directed, does it go through U12?
  3. I sent you the data from TX1 and the 3v3 @ XBEE, the voltage drop is significant, how shall I maintain a stable supply voltage?

Thanks,
Best Regards,
mw2
 
 

Ardusimple Staff replied 4 months ago

1. UART2 output is disabled by default in the software, need to enable via UBX-CFG-PRT
2. It goes internally
3. Current consumption is 100mA@5V. If you have more consumption than this something is not properly wired.

mw2.parkis answered 4 months ago

HI Ardusimple,
I would provide the setting of SimpleRTK, is it correct? 
UBX-CFG-PRT
Target 2-UART 2
PRotocol in : none
Protocol out 5- RTCM3
Baudrate 115200
Databits 8
Stopbits 1
Parity None
Bit Order LSB FIrst
 
Thanks,
Best Regards,
mw2
 

Ardusimple Staff replied 4 months ago

Dear mw2.parkis,

We would really like to help you, unfortunately we are not succeeding. We reviewed your posts and emails again. We need your help to extend your descriptions, unfortunately it is very difficult for us to understand what are you trying to do and which material do you have.

If you want we can try again from the beginning, please summarize:
– What are you trying to do.
– Which material do you have.
– How is it connected.
– Did you load our configuration files
– Which hookup guide did you follow.

We need you to work with us so we can support you better. Finally, we also offer online support at a fee:
https://www.ardusimple.com/product/1-hour-online-consulting-service/

clive1 replied 4 months ago

ZED output should appear at RX2 (Arduino D8)

mw2.parkis answered 4 months ago

HI Ardusimple,
I summarized my test and set up on 1 page and forwarded it to you. Thank you for clarify the connection between F9P to XBEE, I can now measure the RTCM on XBEE RX (base side).
But there is no signal received on the Rover side. I would move onto the debugging of the RF path.
Do you have any suggestions?
@Clive1, I find the data is available on RX of XBEE but not TX2 of the SimpleRTK2B. Thanks,
Best Regards,
mw2

clive1 replied 4 months ago

Yes, TX2 at the Arduino pin is an INPUT, mixes with the XBEE via a diode-AND as far as I’m aware. Really wouldn’t expect you to see a signal there.

mw2.parkis answered 4 months ago

Hi Ardusimple,
Additional information for your reference. I would check the connectivity of the XBEE modules using XCTU, but one of the SimpleRTK2B was not recognized by the software.
PC connection to POWER+XBEE, using XCTU software to find the LR module.

  1. base + LR (cannot detect the XBEE)
  2. rover + LR (XBEE detected, MAC = 0013A20041AE570A)  

exchange the LRs from 1. and 2. 

  1. base + LR (cannot detect the XBEE)
  2. rover + LR (XBEE detected, MAC = 0013A2004178C99D)  

 
Summary

  1. RTCM available @ base’s RX pin but cannot be transmitted, 3v3 available. 
  2. direct connect base and rover, the RTCM signals can be recognized by rover
  3. J2 USB port on base SImpleRTK2B cannot access XBEE
  4. both XBEE LRs can be detected by PC through ‘rover SimpleRTK2B’

 
Please let me know if you can provide me any suggestions.
Thanks,
Best Regards,
mw2
 

Ardusimple Staff replied 4 months ago

– If your base is outputting data, it will not let you communicate with the radio as the RTCM messages will be interrupting this communication. So it’s normal that with the base you can’t communicate with the radio.

– If you want to check communications, we recommend to change both boards to rover. Then pair them using XCTU and use the “Terminal Function” to communicate.

– NOTE: if you changed the configuration of the radios or reverted to default, the communication will not work as we use a special configuration for RTCM transmission. If this is your case contact us by email and we will explain you how to return them to our configuration.

mw2.parkis answered 4 months ago

Hi Ardusimple,
Thanks a lot.
I used the XCTU to read the XBEEs only.
When both SimpleRTK2B boards are now changed to rovers, Unfortunately, only 1 board can detect the XBEE using XCTU. So I cannot check the communications now.
I hope there will be another method to verify the RF communications.
Thanks,
Best Regards,
mw2

Ardusimple Staff replied 4 months ago

Hi mw2.parkis.
You have this material:
simpleRTK2B #1 and Radio #1 everything ok
simpleRTK2B #2 and Radio #2 you can’t talk with Radio.
What happens if you swap the material (Radio #1 on simpleRTK2B #2 and also other 2. What is result?

mw2.parkis replied 4 months ago

Hi Ardusimple,

I follow your suggestion to change both boards to rover configuration.
+ USB cable connects POWER_XBEE and PC
+ run XCTU, close u-center

[case 1] simpleRTK2B #2007 [rover] port detected but no detection of any XBEE (2 XBEE tested)

[case 2] simpleRTK2B #2007 [rover] port detected and 2 XBEE detected as
i) 115200/8/N/1/N – AT; XBee SX 868; MAC: 0013AxxxxxxxxxxA
ii) 115200/8/N/1/N – AT; XBee SX 868; MAC: 0013AxxxxxxxxxxD

Hope that I can get some suggestions from your side.

Thanks,
Best Regards,
mw2