ZED-F9P RTK

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1

Hello guys,

I purchased two ZED-F9P SMA breakout boards and Taoglas MagMAX2 GPS L1/L2 antennas recently to build a RTK system. I used the same hardware (except the antenna) and followed the online tutorial https://learn.sparkfun.com/tutorials/se … rtk-system step by step but not very successful. These are the problems I have:

  1. It needs at least 30 minutes to activate the ‘survey in’ mode. I can see the position fix type is ‘Time’ through the PVT message but ‘Time’ is not showing on the u-center configuration view.

  2. I enabled the RTCM3.3 correction (USB and UART2) on the base board and I can see RTCM3.3 messages were sent out from the message view box. But my rover can not receive them. I have done the following checks:

  3. According to the trouble shooting, I connected the 915MHz radio antenna to my computer using a usb cable directly. The radio can receive the correction without any problem. But these corrections have to time.

    4. [/list]I swap the radio, the same problem still exist[/list]
  4. I reset both board and swap the base and rover board,the same problem still exist

    5. [/list]The voltage output (both rover and base) for 5V pin is 3.3V, 3V pin is 1.8V and Voltage outputs for RX2 and TX2 are around 1.6V (keep changing) [/list]
  5. I connected the UART2 interface Rx2 to Tx2 and Tx2 to Rx2 using cables, the same problem still exist

  6. I connected the UART1 interface Rx to Tx and Tx to Rx1 using cables, then setup the correction output as UART1,the same problem still exist

Can anyone provide some suggestions?

Regards

2

Can you please provide a photo of you wiring set-up? Confirm it looks like this: https://cdn.sparkfun.com/assets/learn_t … ED-F9P.jpg

What type of radio are you using?

Ensure the baud rate setting matches the antennae(s) you are using

The best idea is usually to try and reset to default settings, or use this https://cdn.sparkfun.com/assets/learn_t … Config.txt config file to try and get it going, then modify…but personally I would reset to default settings and then begin the entire https://learn.sparkfun.com/tutorials/se … rtk-system again.

Finally: regarding voltages…the output levels don’t match the labels? that’s odd…if you have a second please make a quick video and link it here, we can forward it to engineering.

Hope this helps!