ModalAI Forum

@Eric-Katzfey this is our GPS status right now INFO [muorb] SLPI: qshell gotten: gps status INFO [muorb] SLPI: Main GPS INFO [muorb] SLPI: protocol: UBX INFO [muorb] SLPI: status: NOT OK, port: 6, baudrate: 0 INFO [muorb] SLPI: sat info: disabled INFO [muorb] SLPI: rate reading: 0 B/s INFO [muorb] SLPI: Ok executing command: gps status INFO [muorb] SLPI: Sending qshell retval with timestamp 855143719, current timestamp 855143720 INFO [qshell] qshell return value timestamp: 855143719, local time: 855147735 pxh>

@M-al-khatib Great, glad to hear it is working now!

@tom I'm not having the same issue with GPS lock. I can get a GPS lock, but my GPS is showing as disabled in QGC. Is there a PX4 parameter loaded on the Sentinel's that defaults them to disable GPS? Changing the EKF2_AID_MASK to enable GPS doesn't due anything. *Ignore this part, just didn't have COM_ARM_WO_GPS set to 0 Also, I'm still concerned about the constant MAG#0 timeout errors, the unstable/unrealistic position estimates I'm getting for Local Position NED in QGC and the high loss rate I'm getting over mavlink. Do you have any suggestions for troubleshooting and is there a way to synchronize the clock on the voxl2 with the clock on the GSC? Thanks

@Jgaucin you can use voxl-portal to view the output of all of the image sensors on the drone. The Sentinel has forward and rearward stereo depth pre-calibrated and tested in the factory https://docs.modalai.com/voxl-portal-cameras/ this might also be useful https://docs.modalai.com/calibrate-cameras/

@Eric-Katzfey Thank you

@Paul-Carff Sounds like your son knows his stuff!

@Eric-Katzfey I think it probably makes a lot of sense to leave it on there and just call it out more in unboxing. We purchased a number of platforms and it only came up with 2 of them.

@Eric-Katzfey Thanks, problem solved.

@stevedan No, we have not encountered that. But can you open this up in a new thread so that it has an appropriate title? Thanks!

@Neil-Huang Yes, if TBS side doesn't use 250000 then that line would need to be changed.

Hi @A-Evans This is our current WiFi solution for Voxl2, or any ModalAI board with a standard USB2 4-position JST GH port. https://www.modalai.com/products/wifi-usb-cable-add-on?_fid=da227b041&_pos=1&_ss=c If you want to use our 10-pin USB3 format connector for the Alpha USB Dongle, then you can also consider using this cable: https://www.modalai.com/products/mcbl-00022 Note: We use Alpha WiFi since it's NDAA compliant You are free to use any WiFI USB dongle sourced at the UK, and make your own cables for USB2 (not too hard for proto-type builds).

@Andre-Moura That's alright, thank you so much for all your help on this!

@JustinDev23 Definitely. See here: https://www.modalai.com/pages/rma

@martygp95, Yes, powering the Sentinel with a 4S is fine. Just be sure NOT TO FLY with it. The tuning for the drone was done around the 3S and if you attempt to fly with the 4S, then there could be detrimental flight-performance. The APM on the Sentinel can handle 2S-6S [2 cell (6.4V min, 7.4V nom, 8.4V max) 6 cell ( 19.2V min, 22.2V nom, 25.2V max)]. You can find info about the APM here Hope that helps

The VOXL 2 Connector Specification is here: https://docs.modalai.com/voxl2-connectors/

Hello, Can you please check the vehicle's attitude (roll, pitch, yaw) when it is sitting flat, right before take-off? You can look at PX4 logs or live using GCS. If the IMU is not calibrated properly, and the vehicle thinks that it is tilted, it will try to compensate for it by tilting in opposite direction, so it can appear as if one of the motors is not able to spin faster, when in fact the flight controller could be commanding it to spin slowly. This is just one reason why this could be happening, so it is worth checking.

@Chad-Sweet Ok, thank you for clarifying!

Any Hobby LiPo charger should work fine. The following supports 1S to 6S and from the picture it looks to come with an XT60 connector as well https://www.amazon.com/Charger-Battery-Balance-Discharger-Adapter/dp/B07R18YNZQ/

@Captain-7th Please check the new forum post where you ask all these questions again.