search

HKUST-Aerial-Robotics / ublox_driver

A driver for u-blox receiver (ZED-F9P) with ros support
GNU General Public License v3.0
96 stars 44 forks source link

The terminal window shows "length error " And the message updates slowly when I echo. #11

Closed SSZ1 closed 6 months ago

SSZ1 commented 1 year ago

I ran the Ublox-Driver using the H-RTK-F9P and picked up the 6 messages. But it shows a "length error" in the Ublox-driver terminal window. Some of the messages updated slowly when I echoed them like the ublox_deiver/ephem , ublox_deiver/glo_ephem. But the others are normal. Why is this? Is something wrong with the device or the project? Or is the GNSS signal weak? Could you offer some advice, please?

image

Thanks for your attention.

Buttosaii commented 1 year ago

Hi @SSZ1, I am facing this error message and slow output results too. For me, its seems that range_meas have the fastest update rate and time_pulse_info have the slowest (barely ever received any results). Is there any update on this issue for you?

I am currently using U-blox ZED F9P on Ubuntu 18.04 Melodic.

SSZ1 commented 1 year ago

Hi @SSZ1, I am facing this error message and slow output results too. For me, its seems that range_meas have the fastest update rate and time_pulse_info have the slowest (barely ever received any results). Is there any update on this issue for you?

I am currently using U-blox ZED F9P on Ubuntu 18.04 Melodic.

It's OK that there is this issue. The GNSS board of my device is the same as yours. And it turns out that this situation won't influence the following experiments. It's OK to use the messages from the Ublox driver.

Buttosaii commented 1 year ago

That is great to hear! Is your ublox_deiver/ephem and ublox_deiver/glo_ephem topics still facing slow update rate?

SSZ1 commented 1 year ago

That is great to hear! Is your ublox_deiver/ephem and ublox_deiver/glo_ephem topics still facing slow update rate?

Yes. The ephem data always updates slowly.