takes forever to go from float to fix

Q&A forumCategory: Questionstakes forever to go from float to fix
radu.petrisor asked 3 months ago
Hi all,
I have a rtk2b + bluetooth that i use in conjunction with the lefebure ntrip app on my phone. I also have the survey antena, the board is in a 3d printed box, powered by a power bank and all is mounted on a survey pole. I use this setup to find certain points in the open field. The NTRIP data comes from a state owned base about 20km away.
Lately i find it’s taking forever to get a rtk fix. it will go to float in a a few seconds but sometimes i had to wait for more that 30 minutes, very rarely i get a fix in 5-10 minutes and other times i can’t get it at all. I’m in the open field, clear skyes.
I have this setup for 4 or 5 years and in the first years i used to get the rtk fix much faster. What can the problem be?
replied 3 months ago

I had identical symptoms about 3 months ago. At first I thought I had overcharged the board, but it received configuration files and firmware changes, then I checked the antenna connections and everything was normal. The unexpected and it was also the solution was in the Bluetooth XBee HC-05. It seemed to work fine, but I tried to configure it with AT commands and it didn’t respond. I bought another bluetooth and everything is back to normal. Thank God.

2 Answers
Ardusimple Staff answered 3 months ago
It is definitely not normal. We would check:

  1. RF connection, check for problems in the RF connectors, RF joints, cables.
  2. Incorrect setting on the board
  3. A change in the caster messages, ZED-F9P likes MSM messages.

If above is not enough to find out the issue, you can send to info@ardusimple.com your setup and my colleagues will help you troubleshoot:

  1. Pictures of board and antennas installation
  2. Logfile recorded from u-center, enabling UBX-RXM-RTCM

root Staff answered 3 months ago
Due to a web issue, the answer from radu is not shown, let us paste it again:

well, i updated to the latest firmware, reloaded the configuration and now it’s back in business, getting RTK in around a minute.

Want to learn more about GPS/RTK?

1. Our engineering team will contact you to solve any questions
2. We will keep you updated about promotions and new product releases
3.You will only hear from us when we have important news, we won’t spam your email