# CANnodes not fully connecting

**URL:** <https://discuss.px4.io/t/cannodes-not-fully-connecting/43319>\
**Category:** PX4 Autopilot\
**Created:** [January 16, 2025, 4:55pm UTC](https://discuss.px4.io/t/cannodes-not-fully-connecting/43319 "2025-01-16T16:55:41Z")\
**Posts on this page:** 5\
**Page:** 1

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**Author:** ![owen487](https://discuss.px4.io/user_avatar/discuss.px4.io/owen487/32/17876_2.png) [@owen487](https://discuss.px4.io/u/owen487)\
**Post date:** [January 16, 2025, 4:55pm UTC](https://discuss.px4.io/t/cannodes-not-fully-connecting/43319/1 "2025-01-16T16:55:41Z")

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I recently made a post asking what is actually supposed to be displayed when using CANnodes on the can bus. Since then I have figured out what I’m supposed to be seeing, and have discovered there is something wrong, whether it be me or PX4 (or maybe something else?)

Note: All of this is using QGC, Pixhawk 6, Ark CANnode

When I plug in my CANnodes, I seem to get only some of the information that I should. I can see the the nodes pop up in the parameters tab with their node ID’s, however when using `uavcan status` I get no sign of life. It spews out the normal stuff but when it comes to displaying the active nodes there is nothing (as in there’s no`124 OK OPERAT`). I also found (not surprisingly) that anything plugged into the nodes, an air-speed sensor for example, would also not show up anywhere. However, when I enter things such as `uavcan param list 124` it will display the relevant information as if an active node was there.

I’m not really sure whats going on and any help would be great. I don’t think the problem is the nodes themselves but if you think there is a reason why it would be do share

Thanks  
Owen

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**Author:** ![AWilkins\_Ascend](https://discuss.px4.io/user_avatar/discuss.px4.io/awilkins_ascend/32/8388_2.png) [@AWilkins\_Ascend](https://discuss.px4.io/u/AWilkins_Ascend)\
**Post date:** [January 16, 2025, 11:29pm UTC](https://discuss.px4.io/t/cannodes-not-fully-connecting/43319/2 "2025-01-16T23:29:14Z")

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if you are using the ark cannode it might be helpful to post in the ark discord channel as they monitor that

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**Author:** ![owen487](https://discuss.px4.io/user_avatar/discuss.px4.io/owen487/32/17876_2.png) [@owen487](https://discuss.px4.io/u/owen487)\
**Post date:** [January 17, 2025, 9:08am UTC](https://discuss.px4.io/t/cannodes-not-fully-connecting/43319/3 "2025-01-17T09:08:54Z")

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I’ll have an ask around on there but I’m not sure this is a problem with the cannode itself

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**Author:** ![owen487](https://discuss.px4.io/user_avatar/discuss.px4.io/owen487/32/17876_2.png) [@owen487](https://discuss.px4.io/u/owen487)\
**Post date:** [January 17, 2025, 9:30am UTC](https://discuss.px4.io/t/cannodes-not-fully-connecting/43319/4 "2025-01-17T09:30:18Z")

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UPDATE: When using `uavcan status` in the MAVLink console, it appears that it sometimes ‘gives up’ halfway through and just doesn’t display all the information.

UPDATE 2: This looks to be happening on several other commands

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<div class="post-metadata">

**Author:** ![AWilkins\_Ascend](https://discuss.px4.io/user_avatar/discuss.px4.io/awilkins_ascend/32/8388_2.png) [@AWilkins\_Ascend](https://discuss.px4.io/u/AWilkins_Ascend)\
**Post date:** [January 17, 2025, 1:56pm UTC](https://discuss.px4.io/t/cannodes-not-fully-connecting/43319/5 "2025-01-17T13:56:05Z")

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Yeah, not saying it is the can node, but the team over there tests this stuff pretty well and can probably give you some direction into what is going on