How to deal with a transmission problem

Hardware
1

When using the Jetson platform to receive packets from Ouster 0, I encountered the following error: “No packets received within 2.0s from sensor os-122122000292.local using udp destination 192.168.2.2 on port 7502. Check your firewall settings and/or ensure that the lidar port 7502 is not being held open.” I’ve attempted two potential solutions:

  1. I executed the command recommended in the official tutorial: sudo ufw allow 7502/udp, but this did not change the outcome of the operation.
  2. Upon inspecting the radar’s packet transmission process, I found that the packets sent by the radar are too large.
    len=24896

Consequently, I attempted to update the firmware. However, I encountered an issue where the update process was interrupted.：

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what are the possible solutions?

2

The firmware update failed because you have a “REV D” sensor as indicated in the pn field which is not compatible with fw3.1. The latest compatible firmware is 2.5.3 which is available for download here (select Rev D from the “Hardware Version” dropdown:

The fw2.5 user manual has some information on packet sizes in different modes: Sensor Data — Ouster Sensor Docs documentation

It looks like you are probably running the LEGACY packet given the 24896 size which matches the table: Sensor Data — Ouster Sensor Docs documentation

3

After upgrading the radar firmware to v2.5.3, Ouster Studio can search for the interface but fail to connect to the radar(the radar isn’t even runninng). What should I do?

1 Like
4

@stevenhe, when you mentioned your Lidar is not running
Are you referring to the Lidar motor not turning, or the Lidar webpage dashboard not showing it is in the RUNNING state?

Are you using a static IP address or using Link-Local only?

Could you try with using Ouster-sdk?
Ouster Sdk visualizer guide:

Ouster SDK installation guide: