@leandro I found M0188 here: https://docs.modalai.com/M0188/#3d-drawings

I did some additional testing and was able to narrow things down a bit. After reconfiguring the WiFi as a SoftAP using voxl-wifi and then rebooting the VOXL, the network now shows up consistently again. So the broadcast issue seems to be resolved for the moment. However, the core problem remains: I still can’t actually connect to the AP — the connection attempt starts, prompts for the password, and then fails just like before.

If anyone has ideas on what else I could check or has seen similar behavior with this setup, I’d really appreciate the help.

Hi guys,

I have a quick question regarding the coordinate frame orientation of the AR0144 tracking camera. As far as I understand it, the camera coordinate system is defined such that the z-axis points out of the lens, the x-axis to the right and the y-axis downward when looking through the camera.

What I am currently unsure about is the originally intended orientation of the tracking camera frame itself. I created a small sketch showing the two possible orientations I could think of. Which one is the correct one, the left or the right figure?

Additionally, I was wondering whether en_rotate in the voxl-camera-server.conf modifies the camera extrinsics, i.e. whether it applies a rotation to the underlying camera coordinate frame such that the extrinsics would need to be configured accordingly (for example upside down), or if it purely affects the image stream orientation without altering the extrinsic calibration at all.

Thanks a lot in advance!

Hi everyone,

I am experiencing persistent WiFi issues with my VOXL 2 using the M0151 USB3/UART Expansion Adapter and the Alfa Network AWUS036EACS dongle I bought in the WiFi add-on kit. When I initially used this setup with an older SDK version (likely around 1.0), the WiFi in SoftAP mode was working reliably and I was able to connect to the network without any problems. After upgrading to SDK 1.5, these issues already started to appear, and the same behavior is still present after upgrading further to SDK 1.6.

In SDK 1.6, the SoftAP SSID is still being broadcast and visible, but my laptop is unable to connect — the connection attempt starts, asks for the password, and then eventually fails. Station mode is also non-functional, as no external networks are found. After a power cycle, the WiFi network disappears entirely. When reflashing SDK 1.6, the same pattern repeats: the SSID appears again, the connection fails, and after the next reboot it vanishes. The dongle is correctly detected via lsusb at all times, and voxl-my-ip still shows the expected default IP. I configured the modem as type 28 (M0151 with AWUS036EACS), and also tested other modem configurations without success. In dmesg I frequently see repeated messages such as “wlan0: link is not ready” and “wlan0: link becomes ready”. At this point I am unsure whether this is caused by a driver regression in newer SDKs, a USB 3.0 compatibility issue with the AWUS036EACS, or a networking stack/configuration problem. Has anyone encountered similar behavior or can provide guidance? Any hints would be highly appreciated.

(I also noticed that the WiFi add-on kit consisting of the M0151 adapter and the AWUS036EACS dongle is no longer available in the shop, which made me wonder if this setup is still officially supported.)

Thanks in advance!

Dear ModalAI Team,

we are currently developing a prototype for an indoor inspection drone and had a question regarding the VOXL Mapper.
Is it possible to automatically trigger the Plan to Home function of VOXL Mapper in the event of a failsafe or connection loss?
In other words, is there a way for PX4 to trigger an event in the MPA Pipe?
If this is not possible without significant effort, we are also considering implementing the voxblox algorithm in ROS2 and triggering a return-to-home event from PX4 through ROS2.
Would it be possible for PX4 to trigger such an event in ROS2 — for example, in response to a failsafe condition?

Thanks in advance!

@Vinny Yes, thank you very much!

Hi guys,

I’m planning to use a VOXL FPV ESC and was wondering whether the current sensor detects not only the current drawn by the motors but also the current drawn from the payload connector J2.
Does the payload current get sensed as well?

Thanks in advance!

And is it possible to connect the i/o expander board (M0065) to the VOXL 2 WiFi Add-on board (MDK-M0141-1-01) to achieve a pwm output ?

Dear ModalAI Team,

We are currently trying to control a Caddx GM1 gimbal via PWM using our RC transmitter (TBS Tango 2 with Crossfire). As our flight controller, we are using the VOXL2 running PX4.
We read that it might be possible to generate a PWM signal using the 4-in-1 FPV ESC, which can be controlled via an RC input—could you confirm if this is correct? If not, what alternative options are available for generating a PWM signal?
We are planning to use the ModalAI ESC via UART, as well as the Crossfire Nano RX and a UART-to-USB adapter, which leaves us with no available interface for connecting the VOXL I/O board—would that be accurate?
We are aware that this topic has been discussed in various forum threads, but unfortunately we haven't been able to find a clear solution that fits our setup.
Thank you very much in advance for your help!

@Alex-Kushleyev Thank you very much!