<?xml version="1.0" encoding="UTF-8"?><rss xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:content="http://purl.org/rss/1.0/modules/content/" xmlns:atom="http://www.w3.org/2005/Atom" version="2.0"><channel><title><![CDATA[ESCs, Sensors and Accessories]]></title><description><![CDATA[ESCs, image sensors, ToF and tracking cameras, Microhard and cellular modems, power modules, GPS and other add-on boards.]]></description><link>https://forum.modalai.com/category/15</link><generator>RSS for Node</generator><lastBuildDate>Wed, 07 Oct 2026 06:54:54 GMT</lastBuildDate><atom:link href="https://forum.modalai.com/category/15.rss" rel="self" type="application/rss+xml"/><pubDate>Sat, 03 Oct 2026 05:51:04 GMT</pubDate><ttl>60</ttl><item><title><![CDATA[Repairing M0138]]></title><link>https://forum.modalai.com/topic/5500/repairing-m0138</link><guid isPermaLink="true">https://forum.modalai.com/topic/5500/repairing-m0138</guid><pubDate>Sat, 03 Oct 2026 05:51:04 GMT</pubDate></item><item><title><![CDATA[M0155 datasheet]]></title><description><![CDATA[We have added the pinouts here: https://docs.modalai.com/M0155/
]]></description><link>https://forum.modalai.com/topic/5430/m0155-datasheet</link><guid isPermaLink="true">https://forum.modalai.com/topic/5430/m0155-datasheet</guid><dc:creator><![CDATA[Moderator]]></dc:creator><pubDate>Tue, 22 Sep 2026 15:05:45 GMT</pubDate></item><item><title><![CDATA[Camera Calibration – Starling 2 Max]]></title><description><![CDATA[@tom thank you 
]]></description><link>https://forum.modalai.com/topic/5428/camera-calibration-starling-2-max</link><guid isPermaLink="true">https://forum.modalai.com/topic/5428/camera-calibration-starling-2-max</guid><dc:creator><![CDATA[Vito]]></dc:creator><pubDate>Tue, 22 Sep 2026 08:26:25 GMT</pubDate></item><item><title><![CDATA[Custom voxl-camera-server config service aborts itself]]></title><description><![CDATA[Thanks for the detailed report. A few notes based on what's in the log:


The missing intrinsics files are not the cause of the abort — those ERROR in json_from_yaml, failed to open file / tracking_front_intrinsics.yml warnings are expected if you haven't run camera calibration yet, and voxl-camera-server falls back to default intrinsics. That's noise, not the crash.


The actual "Aborted" with no further message is what we need to isolate. The docs' Debugging Camera Issues page is the right starting point for this class of failure, but the excerpt we have doesn't show the specific abort signature you're hitting, so I don't want to guess at root cause here. Can you get us:

dmesg output right after the crash (look for a segfault/kernel oops around the same timestamp)
Whether there's a core dump generated (check /data/core* or wherever core dumps land on your image) — if so, a backtrace via gdb would tell us exactly which line aborts
Run voxl-camera-server under gdb directly (gdb --args voxl-camera-server, then run, then bt once it aborts) — this is the fastest way to get a real stack trace instead of guessing



The "works after a couple of systemctl restart calls" behavior strongly suggests a race/init-order issue rather than a config problem — since your config itself (both the custom_camera_config.txt and generated voxl-camera-server.conf) looks structurally correct for two independent ar0144 cameras. One thing worth double checking: you're using ar0144-fsin-combo on J6_LOWER_COMBO1 for tracking_down, but I don't see a J6_LOWER_COMBO1_NAME2 or combo-mode field set — since this is a combo slot, confirm whether that flex is truly running in single-sensor mode. If the combo detection is flaky on init (i.e. it doesn't always see the second physical sensor consistently), that could cause a transient failure on cold start that clears on restart.


Please also confirm which mach.var / carrier board (M0054) revision and whether tracking_down is on a combo flex physically wired for single-sensor use — a photo of the flex connection would help us rule out a physical/timing issue on that port.


]]></description><link>https://forum.modalai.com/topic/5426/custom-voxl-camera-server-config-service-aborts-itself</link><guid isPermaLink="true">https://forum.modalai.com/topic/5426/custom-voxl-camera-server-config-service-aborts-itself</guid><dc:creator><![CDATA[Moderator]]></dc:creator><pubDate>Mon, 21 Sep 2026 19:09:18 GMT</pubDate></item><item><title><![CDATA[USB3 On M0062]]></title><description><![CDATA[Hi @schuyler.kellogg , the USB-A cable is back up for sale... sorry about that...
https://www.modalai.com/products/mcbl-00022
]]></description><link>https://forum.modalai.com/topic/5423/usb3-on-m0062</link><guid isPermaLink="true">https://forum.modalai.com/topic/5423/usb3-on-m0062</guid><dc:creator><![CDATA[Vinny]]></dc:creator><pubDate>Sun, 20 Sep 2026 04:45:50 GMT</pubDate></item><item><title><![CDATA[M0184 ELRS no CRSF data after SDK 1.6.4 upgrade]]></title><description><![CDATA[@chiu-pk
The LED status is good, this receiver should be recoverable assuming the wiring is correct.

Could the M0184 firmware update have caused the receiver to lose its previous binding/configuration?

Yes some updates will unbind the receiver. If you want to put the receiver back in bind mode and voxl-elrs doesn't work, hold the button for 5 seconds and it should enter bind mode indicated by the led status rapid double blink

Is it expected that voxl-elrs ping gets no response while the receiver is waiting for binding?

voxl-elrs ping should work in both cases, but to be sure try to bind and see if it works

Is there a recommended recovery/reflash or reconfiguration procedure for the M0184 in this situation?

Try to get voxl-elrs working if possible, if not then using the expresslrs configurator pointed to our custom fork of ELRS with a USB serial adapter that supports 420000 baud will allow you to update
https://docs.modalai.com/elrs-configurator/
]]></description><link>https://forum.modalai.com/topic/5417/m0184-elrs-no-crsf-data-after-sdk-1.6.4-upgrade</link><guid isPermaLink="true">https://forum.modalai.com/topic/5417/m0184-elrs-no-crsf-data-after-sdk-1.6.4-upgrade</guid><dc:creator><![CDATA[Ben Linne]]></dc:creator><pubDate>Tue, 15 Sep 2026 10:26:11 GMT</pubDate></item><item><title><![CDATA[VOXL FPV ESC with 7S Battery]]></title><description><![CDATA[Hi @moderator
The operating range is 2-6S input VBAT.
We currently have no plans for &gt;6S at this time on the ESCs.
The 40V is a part rating which gives margin for safe operating limits, transient immunity, or other electrical effects. This is documented to instill confidence in our users that we selected quality parts capable of handling various conditions outside of nominal such as back-EMF, energy dumps, incorrect wiring, or severe transients.
We are keeping tabs on the trends in this market and will ascertain for future products if increased operating points are warranted broadly. I do see up to 8S is becoming more popular, but it will increase size and cost of products to enable that capability.
Thanks!
]]></description><link>https://forum.modalai.com/topic/5395/voxl-fpv-esc-with-7s-battery</link><guid isPermaLink="true">https://forum.modalai.com/topic/5395/voxl-fpv-esc-with-7s-battery</guid><dc:creator><![CDATA[Vinny]]></dc:creator><pubDate>Tue, 25 Aug 2026 15:44:10 GMT</pubDate></item><item><title><![CDATA[VOXL ESC FPV 4-in-1 with Built-in Power Module (MDK-M0138) Issues]]></title><description><![CDATA[Could you post a log of the drone flip?
]]></description><link>https://forum.modalai.com/topic/5374/voxl-esc-fpv-4-in-1-with-built-in-power-module-mdk-m0138-issues</link><guid isPermaLink="true">https://forum.modalai.com/topic/5374/voxl-esc-fpv-4-in-1-with-built-in-power-module-mdk-m0138-issues</guid><dc:creator><![CDATA[Eric Katzfey]]></dc:creator><pubDate>Tue, 11 Aug 2026 15:00:39 GMT</pubDate></item><item><title><![CDATA[MDK-M0041]]></title><link>https://forum.modalai.com/topic/5337/mdk-m0041</link><guid isPermaLink="true">https://forum.modalai.com/topic/5337/mdk-m0041</guid><pubDate>Thu, 23 Jul 2026 01:29:09 GMT</pubDate></item><item><title><![CDATA[Significant Motor Desync During Actuator Testing]]></title><description><![CDATA[@Alex-Kushleyev
Hey Alex. Thanks for this input. I will incorporate your feedback as we continue initial motor testing and let you know if we need further guidance.
Much appreciated!
]]></description><link>https://forum.modalai.com/topic/5335/significant-motor-desync-during-actuator-testing</link><guid isPermaLink="true">https://forum.modalai.com/topic/5335/significant-motor-desync-during-actuator-testing</guid><dc:creator><![CDATA[PatkirkMartin]]></dc:creator><pubDate>Wed, 22 Jul 2026 20:44:08 GMT</pubDate></item><item><title><![CDATA[Third Party ESC integration w/ VOXL2]]></title><description><![CDATA[@patkirkmartin , so sorry for the delay. We are ready to proceed with sharing the source code for M0065 board and I just wanted to double check that you are still interested. Please let me know and we will get this going right away.
If you use our APM, it will provide power for VOXL2 and the APM also includes voltage and total current sensing and has PX4 support for that. The information is delivered to px4 via I2C.
If ModalAI ESCs are used, such as M0129 (mini esc) or M0138 (larger / racing ESC), they both provide power for VOXL and measure voltage and total current and provide this information to PX4 via telemetry via UART.
Alex
]]></description><link>https://forum.modalai.com/topic/5322/third-party-esc-integration-w-voxl2</link><guid isPermaLink="true">https://forum.modalai.com/topic/5322/third-party-esc-integration-w-voxl2</guid><dc:creator><![CDATA[Alex Kushleyev]]></dc:creator><pubDate>Thu, 16 Jul 2026 19:39:17 GMT</pubDate></item><item><title><![CDATA[ESC Support Questions]]></title><description><![CDATA[We do not support DSHOT when using Voxl2 + IO Expander board. However, OneShot125 is supported (though you would need to re-build voxl-px4 pakage and change the following scale factor : https://github.com/modalai/px4-firmware/blob/voxl-dev/src/drivers/voxl2_io/voxl2_io.hpp#L133) -- set MIXER_OUTPUT_TO_CMD_SCALE = 125 instead of 1000. This would reduce the actuator latency by 1-2ms (as long as the ESC supports OneShot125).
]]></description><link>https://forum.modalai.com/topic/5311/esc-support-questions</link><guid isPermaLink="true">https://forum.modalai.com/topic/5311/esc-support-questions</guid><dc:creator><![CDATA[Alex Kushleyev]]></dc:creator><pubDate>Tue, 07 Jul 2026 14:10:43 GMT</pubDate></item><item><title><![CDATA[Software On/Off VTX Power using VOXL FPV 4in1 ESC]]></title><description><![CDATA[@vinny @alex-kushleyev @tom
Thanks for the input guys! Happy to report it is all working as intended. Much appreciated.
]]></description><link>https://forum.modalai.com/topic/5284/software-on-off-vtx-power-using-voxl-fpv-4in1-esc</link><guid isPermaLink="true">https://forum.modalai.com/topic/5284/software-on-off-vtx-power-using-voxl-fpv-4in1-esc</guid><dc:creator><![CDATA[PatkirkMartin]]></dc:creator><pubDate>Mon, 22 Jun 2026 15:58:31 GMT</pubDate></item><item><title><![CDATA[M0041-4 Power Module for VOXL2 Mini Dead and Killed VOXL2 Mini]]></title><description><![CDATA[Hi @awagner
Apologies for the delayed response. It looks like this post slipped through during our recent forum and documentation site refactor.
Are you still experiencing issues with your M0041-4?
A few clarifying questions will help:
When you mention "that is dead too", can you please clarify what exactly is no longer working? The M0041-4 power module, the VOXL 2 Mini, your power supply, or some combination of the three?
Can you share more details about your ESC, make, model, and how the battery pads are connected to the power module? A photo of your wiring connections would be very helpful here.
On the spark at plug-in: direct battery connection is the standard way to power up a drone, so that in itself is not unexpected. The spark on connection is not uncommon with a 6S pack due to charge balancing and inrush transient at the moment of contact (especially with our FPV ESC with near 1,000uF of capacitance). That said, we do include protection on the M0041-4 for this reason, so something unusual may have happened in your specific setup, which is why we'd like to see the connections.
As a general note, we typically see XT-30 used up to 4S and XT-60 up to 6S. Running 6S on an XT-30 is outside the more common usage pattern and worth flagging as a potential factor. We had some folks mistake a 4S ESC for 6S due to exactly that on early Stinger models. We've since remedied that.
One practical note: depending on what has failed, a replacement power module may be a faster and cheaper path than a full debug effort. That said, we do want to help you identify the root cause so this does not repeat. Replacing hardware without understanding the failure just puts the next module at the same risk.
Let us know and share photos if you can.
Again, sorry for the long delayed response.
Thanks!
]]></description><link>https://forum.modalai.com/topic/5278/m0041-4-power-module-for-voxl2-mini-dead-and-killed-voxl2-mini</link><guid isPermaLink="true">https://forum.modalai.com/topic/5278/m0041-4-power-module-for-voxl2-mini-dead-and-killed-voxl2-mini</guid><dc:creator><![CDATA[Vinny]]></dc:creator><pubDate>Fri, 19 Jun 2026 19:51:26 GMT</pubDate></item><item><title><![CDATA[LTE v2 VPN]]></title><description><![CDATA[@Barry-Hammond https://docs.modalai.com/voxl-streamer/#how-to-stream-video-with-rtsp-on-voxl
Quality greatly depends on your LTE coverage and VPN performance. I recommend lowering the bitrate in /etc/modalai/voxl-streamer.conf until you're happy with the response rate.
Tailscale can add overhead as well and our recent LTE testing has involved hosting a custom WireGuard server.
]]></description><link>https://forum.modalai.com/topic/5230/lte-v2-vpn</link><guid isPermaLink="true">https://forum.modalai.com/topic/5230/lte-v2-vpn</guid><dc:creator><![CDATA[tom]]></dc:creator><pubDate>Mon, 01 Jun 2026 13:01:12 GMT</pubDate></item><item><title><![CDATA[Voxl ESC not responding and not detected]]></title><description><![CDATA[Hi @Jetson-Nano,
Can you please clarify the following - in your original post, you mentioned that the third party ESC also had issues, however in the post above you said no issues. I am quoting your notes from above:
"
Scenario 3 – Third-Party ESC Evaluation
To further isolate the issue, we replaced the VOXL FPV ESC with a NeutronRC X-CLASS 4IN1 ESC V2 (3–8S, 70A) configured using the DShot protocol.
During testing, we observed the following:
ESC temperature increased rapidly, reaching approximately 80°C to 90°C within two minutes of flight.
One motor would subsequently stop during flight.
The aircraft would lose stability and crash.
"
I just wanted to clarify what actually happened and then we can investigate further. Than, you for providing the diagram, i think it looks OK.
I have never seen this behavior where the ESC reports incorrect voltage and these short spikes in temperature. This may point to a hardware issue on the ESC board, but i do not actually know where it might be or what would cause it. Have you visually inspected the FPV ESC that has this issue to see if any components appear damaged or anything looks unusual?
Alex
]]></description><link>https://forum.modalai.com/topic/5228/voxl-esc-not-responding-and-not-detected</link><guid isPermaLink="true">https://forum.modalai.com/topic/5228/voxl-esc-not-responding-and-not-detected</guid><dc:creator><![CDATA[Alex Kushleyev]]></dc:creator><pubDate>Sat, 30 May 2026 12:14:38 GMT</pubDate></item><item><title><![CDATA[M0084 with VOXL2 Mini Unable to detecto camera on Upper Slot]]></title><description><![CDATA[@awagner , I believe on VOXL2 Mini should be able to support any 4 cameras on the J6L, J6U, J7L, J7U (specifically the AR0144 (M0149) and IMX412 (M0107), which I assume you are using)
Can you please clarify the error that you are seeing? Is the issue the lack of correct sensormodule or something else? (you can check if correct sensormodules are present in /usr/lib/camera after configuring the cameras). As a reminder, the J6L, maps to slot 0, J6U, slot 1, J7L slot 2 and J7U slot 3.
Are you able to connect the 2 AR0144 cameras to J6 and J7?
What is your goal - how many of each cameras do you need to use? We can test it.
Alex
]]></description><link>https://forum.modalai.com/topic/5218/m0084-with-voxl2-mini-unable-to-detecto-camera-on-upper-slot</link><guid isPermaLink="true">https://forum.modalai.com/topic/5218/m0084-with-voxl2-mini-unable-to-detecto-camera-on-upper-slot</guid><dc:creator><![CDATA[Alex Kushleyev]]></dc:creator><pubDate>Tue, 26 May 2026 23:14:31 GMT</pubDate></item><item><title><![CDATA[VOXL FPV ESC one motor not spinning]]></title><description><![CDATA[@qubotics-admin , thanks for doing the motor swap test. From this result, it does appear that one of the ESC channels is not working properly. We would like to take a look at the ESC - are you able to send it back for inspection? We can send you a replacement ESC in return.
Alex
]]></description><link>https://forum.modalai.com/topic/5215/voxl-fpv-esc-one-motor-not-spinning</link><guid isPermaLink="true">https://forum.modalai.com/topic/5215/voxl-fpv-esc-one-motor-not-spinning</guid><dc:creator><![CDATA[Alex Kushleyev]]></dc:creator><pubDate>Thu, 21 May 2026 14:46:02 GMT</pubDate></item><item><title><![CDATA[Inquiry About 5G Modem Carrier Board (USIM & VPN Support)]]></title><link>https://forum.modalai.com/topic/5196/inquiry-about-5g-modem-carrier-board-usim-vpn-support</link><guid isPermaLink="true">https://forum.modalai.com/topic/5196/inquiry-about-5g-modem-carrier-board-usim-vpn-support</guid><pubDate>Wed, 06 May 2026 00:47:10 GMT</pubDate></item><item><title><![CDATA[M0024 what is the purpose of the holes on the back of the camera?]]></title><description><![CDATA[Hi @mtcbj
That is the flex stiffener. Our older image modules used stainless steel. Some of our newer modules use laminate.
Those holes are likely just flex/FPC air escapes during the backer lamination process. They do not provide any functional purpose after assembly.
I see no issue filling them with epoxy.
Hope that helps!
]]></description><link>https://forum.modalai.com/topic/5194/m0024-what-is-the-purpose-of-the-holes-on-the-back-of-the-camera</link><guid isPermaLink="true">https://forum.modalai.com/topic/5194/m0024-what-is-the-purpose-of-the-holes-on-the-back-of-the-camera</guid><dc:creator><![CDATA[Vinny]]></dc:creator><pubDate>Mon, 04 May 2026 23:49:45 GMT</pubDate></item><item><title><![CDATA[M0195]]></title><description><![CDATA[@leandro , yes we do have M0195 boards available. Please send us a contact inquiry to get a custom order (https://www.modalai.com/pages/contact-us).
The connectors J01, J23, J45 and J67 are not populated - we do not have a build with those connectors. You would need to add them yourself.
Also, we are currently not (yet) officially supporting the ToF pills on this board, there is limited internal testing being done. We may be able to provide limited support for that. If you are interested, i can find out what the status of this effort is.
MCBL-00128 we have is only 75mm, unfortunately.
There is a way to make the TOF V2 work on VOXL2 mini, however it is a bit of a hack (which temporarily enabled a transition to the new TOF V2 while using old camera connectors, which did not provide enough power).

https://www.modalai.com/products/m0178?variant=48528287826224
basically this configuration uses M0169 adapter (instead of M0178). https://docs.modalai.com/M0169/
M0169 requires a power input of 5V ideally 1.5A, provided via the 2-pin JST connector. If you were using a voxl2, then you can use the provided 4-pin power cable with a split connection for the TOF sensor. In case of VOXL2 mini, since it accepts 3.8V input, you will need a separate 5V supply.
M0169 can be connected to M0076 or M0135 camera interposers using the standard flex cables, such as M0074 (comes with this kit), M0036.

Note that if you use M0195 camera front end (or M0188), then you will not be able to use the TOF V2 because both camera connectors on voxl2 mini would be used up.
What's included in M0169 kit (from our shop page linked above)
[image: 1778554794410-55c9deee-e676-471f-8939-e6ece7f80813-image.png]
]]></description><link>https://forum.modalai.com/topic/5187/m0195</link><guid isPermaLink="true">https://forum.modalai.com/topic/5187/m0195</guid><dc:creator><![CDATA[Alex Kushleyev]]></dc:creator><pubDate>Wed, 29 Apr 2026 19:56:54 GMT</pubDate></item><item><title><![CDATA[VOXL Mini 4-in-1 ESC: old/new mixed in a shipment (?)]]></title><description><![CDATA[@extmoddain ,
Can you please send a picture of the damaged ESCs? Which component blew up? Also what do the labels on the ESD bags from those ESCs say?
The 6s version of M0129 (mini ESC) should have a small label on the white 4-pin connector that says either -63 or -65 (meaning 6S and either 3.8V or 5.0V output for VOXL2 mini or VOXL2). We can also check using the serial number (label should be present on the ESC)
https://docs.modalai.com/voxl-mini-esc-datasheet/#specifications
[image: 1777179257146-aa7bc73c-90f7-41ae-9f28-cacb800c72eb-image.png]
Alex
]]></description><link>https://forum.modalai.com/topic/5182/voxl-mini-4-in-1-esc-old-new-mixed-in-a-shipment</link><guid isPermaLink="true">https://forum.modalai.com/topic/5182/voxl-mini-4-in-1-esc-old-new-mixed-in-a-shipment</guid><dc:creator><![CDATA[Alex Kushleyev]]></dc:creator><pubDate>Sat, 25 Apr 2026 19:47:29 GMT</pubDate></item><item><title><![CDATA[Time of Flight Sensor to be used on RB5 and Starling 2 Max]]></title><description><![CDATA[@ChrisB here is a system architecture to follow: https://docs.modalai.com/voxl2-d0014/
We do not support an RB5, that is a Qualcomm product
]]></description><link>https://forum.modalai.com/topic/5177/time-of-flight-sensor-to-be-used-on-rb5-and-starling-2-max</link><guid isPermaLink="true">https://forum.modalai.com/topic/5177/time-of-flight-sensor-to-be-used-on-rb5-and-starling-2-max</guid><dc:creator><![CDATA[Moderator]]></dc:creator><pubDate>Mon, 20 Apr 2026 17:10:37 GMT</pubDate></item><item><title><![CDATA[Higher lens mount]]></title><description><![CDATA[Hello @Gerhold-Ten-Voorde ,
This is not related to the quality, but instead, it is a supply chain decision.
Alex
]]></description><link>https://forum.modalai.com/topic/5173/higher-lens-mount</link><guid isPermaLink="true">https://forum.modalai.com/topic/5173/higher-lens-mount</guid><dc:creator><![CDATA[Alex Kushleyev]]></dc:creator><pubDate>Fri, 17 Apr 2026 09:03:28 GMT</pubDate></item></channel></rss>