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    1. Home
    2. Matthew Wellner
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    • Topics 15
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    Topics created by Matthew Wellner

    • M

      voxl-camera-server saying Boson doesn't support 640x512 resolution when starting

      Ask your questions right here!
      • • 4 Aug 2025, 12:55 • Matthew Wellner 22 days ago
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      A 22 days ago

      @Matthew-Wellner , thanks for the update!

      Out of curiosity, does the properly configured Boson work with original hardware + the CCI workaround in the kernel? It would be helpful for us to have that information for debugging.

      Please send back the non-working adapters when you get a chance.

      Thank you!

      Alex

    • M

      Flir Boson over m0153 setup

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      • • 3 Jul 2025, 13:39 • Matthew Wellner 18 Jul 2025, 16:20
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      M 18 Jul 2025, 16:20

      @Alex-Kushleyev Thanks again for the help. Unfortunately as it turns out, even though I have a Boson 640+ FLIR told me that the version I have is right before they started providing the MIPI output. I can still use the UVC interface, but it doesn't look like the Boson+ that I have can use the MIPI adapter after all. I don't know that many others will have my problem, but you guys might want to note that only the newest version of the Boson camera will support the MIPI adapter kit (https://flir.custhelp.com/app/answers/detail/a_id/6245/~/flir-oem---boson-software-versions).

      Matt

    • M

      Quectel-CM error when Initializing a connection (SDK 1.5.0)

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      • • 3 Jul 2025, 12:43 • Matthew Wellner 3 Jul 2025, 13:03
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      M 3 Jul 2025, 13:03

      I grabbed the /usr/bin/quectel-CM from another VOXL2 on an older SDK (1.4.1) and swapped out the one that came with 1.5.0 and everything is working again...

    • M

      Low Latency IMX412 Driver

      Video and Image Sensors
      • • 21 Apr 2025, 17:26 • Matthew Wellner 28 Apr 2025, 15:52
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      A 28 Apr 2025, 15:52

      @Matthew-Wellner , I am glad you got it working! When you used M0076 single camera interposer connected to VOXL2 J7, actually you were connecting to the "lower" camera slot, so that would be J7L, meaning slot ID 2, not 3. That is why your camera was not detected in that case.

      Regarding your M0084 not working, it could be a hardware issue in the flex cable or it's connectors. In order to figure this out, some more testing would be needed. Also, typically we suggest avoiding daisy chaining flex cables, so M0076 / M0135 allows you to do just that. It is possible that a combination of M0084 and another extension cable create sufficient signal distortion of the MIPI lines to cause CRC errors.

      Alex

    • M

      LTE or 5G carrier USB Mode

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      • • 27 Jun 2024, 17:33 • Matthew Wellner 25 Sept 2024, 13:57
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      V 25 Sept 2024, 13:57

      Hi @Matthew-Wellner
      Yes, we sell some modem products as "stand-alone" which can be connected to any USB host.
      We have not offered our popular M0090 5G modem in that mode, but we have offered it for the older Microhard and Sierra 4G modules, but right now we only offer it on Microhard:
      https://www.modalai.com/collections/modems/products/mdk-m0048-2

    • M

      Does Flight Core v2 Support Here3 using CAN?

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      • • 31 May 2024, 21:14 • Matthew Wellner 1 Jun 2024, 00:21
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      M 1 Jun 2024, 00:21

      @Moderator thanks for letting me know. I have a here 2 laying around. I'll just use that instead.

    • M

      Our VOXL2 stopped responding

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      • • 27 May 2024, 22:52 • Matthew Wellner 1 Jun 2024, 00:28
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      V 1 Jun 2024, 00:28

      No @Matthew-Wellner , Our shipping dept is already done for the day and we missed UPS/FedEx drop-off times for next day delivery.

      I can't offer anything other than consolation that we've had some of our customers be amenable to a demo with non-NDAA compliant stuff with our assurance we have a plan to switch over (especially yours since it is available and in-hand, but just not working at the moment).

      I only wish I could probe your board remotely to help you figure this out... sorry.

    • M

      Hadron 640R integration with VOXL2 using Gremsy gimbal solution?

      Ask your questions right here!
      • • 23 May 2024, 20:22 • Matthew Wellner 23 May 2024, 20:22
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    • M

      GPS failing to display in QGroundControl from VOXL2

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      • • 23 May 2024, 20:18 • Matthew Wellner 23 May 2024, 20:18
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    • M

      Odd behavior from ModalAI 4 in 1 ESC

      Ask your questions right here!
      • • 19 May 2024, 23:03 • Matthew Wellner 21 May 2024, 21:00
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      A 21 May 2024, 21:00

      @Matthew-Wellner , As we discussed offline, I am going to post the summary for the likely issue here:

      By setting "demag_timing: 1" in esc params, it enabled some experimental feature, which fails to work correctly above certain rpm. It prevents motor from spinning faster when more power is applied (above a certain rpm). You can see from plots above, the desired command for motor 4 (purple) goes higher, but actual rpm is flat lined around 5700rpm (black). Also the current jumps up significantly for motor 4 (black) when it hits that ceiling.

      For your motor, please disable this "feature" by setting demag_timing to 0. Depending on your current timing advance, we may keep that the same or increase slightly.

      After disabling demag_timing-> 0, i would recommend performing rpm step tests to make sure the de-syncs still do not happen.

      I am sorry about this, I will update documentation to not recommend using this feature.

      9ac17b56-3431-408e-bd34-a7006eeb55ef-image.png

      zoomed in
      c12f7747-3523-416b-8467-f462ee7b7561-image.png

      Alex

    • M

      NDAA Compliance for LTE or 5G modems

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      • • 29 Apr 2024, 15:46 • Matthew Wellner 29 Apr 2024, 15:46
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    • M

      VOXL 2 hires camera not found even though it's connected

      Ask your questions right here!
      • • 13 Feb 2024, 00:29 • Matthew Wellner 14 Feb 2024, 15:05
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      M 14 Feb 2024, 15:05

      @Alex-Kushleyev That fixed it for me. Thanks again for the help!

    • M

      Way to reduce motor arming spin speed in PX4 params?

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      • • 24 Jan 2024, 13:30 • Matthew Wellner 24 Jan 2024, 19:42
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      A 24 Jan 2024, 19:42

      @Matthew-Wellner,

      The ESC params should have min_rpm parameter set to the minimum RPM that you obtained during your tests, specifically the RPM that motor spins when you send ./voxl-esc-spin.py --power 10 command, as 10% power is pretty much the minimum you would want to use on the ESC itself.

      Then you make sure your PX4 params also use this value for min_rpm for the following param: VOXL_ESC_RPM_MIN , however you also want to make sure the max_rpm ESC param corresponds to VOXL_ESC_RPM_MAX in PX4 params, otherwise the rpm range will not work correctly in PX4.

      You should also do some sanity checking. Knowing your propeller's thrust vs rpm curve helps a lot. Then you can check the commanded / actual motor RPMs versus your vehicles weight. It is possible to build a very lightweight vehicle, such that even small amount of thrust % would result in above hover thrust. You typically want to avoid those situations because it would be hard to achieve stable flight.

      Finally, you should check your px4 log, you could load it here to generate plots, including actuator commands and reported RPMS and you can check if those RPMs make sense. https://review.px4.io/ . Please take note that this is a public site.

    • M

      Arming VOXL, but motors won't spin up

      Ask your questions right here!
      • • 23 Jan 2024, 16:44 • Matthew Wellner 26 Aug 2024, 18:50
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      Kiazoa JoaoK 26 Aug 2024, 18:50

      @Alex-Kushleyev I had a similar issue and this helped a lot. thanks.

    • M

      Can you power VOXL2 from the ModalAI 6s ESC?

      Ask your questions right here!
      • • 21 Dec 2023, 21:06 • Matthew Wellner 26 Jan 2024, 00:14
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      M 26 Jan 2024, 00:14

      @Alex-Kushleyev Awesome!! Thanks!

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