ModalAI Forum

Eric Katzfey

As far as I know no one has ever tried this. I don't think HITL is supported by ardupilot (was in the past) but there may be some sort of Simulation on Hardware (SoH) that you could try to get running on VOXL2. I'm guessing it wouldn't be easy.

Vinny

Hi @saegsali
yes, I can help with this. Sorry for the delay in responding here...
I will email you to enable the schematic transfer and review setup.
For your schematic, these items will ensure a speedy and seamless review:

Searchable PDF
All items annotated and page numbers correct
Off page references if multi-page
Caps and R's should have their ratings visible (voltages, power, values)
A simple block diagram to help me understand what you are trying to do.

Thanks!

Vinny

Hi @moderator
The operating range is 2-6S input VBAT.
We currently have no plans for >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!

Vinny

Hi @rowan-dempster
Yes, we know we purposely put the SPI3 bus in two locations. It was intentional, but we have since learned not the best approach for all customers, so we have no plans to do that again. The CS_N issue you are seeing is not surprising.
That being said, if you keep continuing with the SW configuration (which may not be easily solved and I do not think we've done that internally yet) our only suggestion for options right now are as follows:

Use a different SPI bus. J3/J5 have other options. It is a smaller "Ask" to enable SPI11 on J5 than fix SPI3.
https://docs.modalai.com/voxl2-qups/
Rework (i.e,: remove) the IMU (does not help if you need that IMU however). We can give you a waiver on the RMA exclusions on these boards should something else arise not related to that rework process.

Hope that helps, and sorry if it's not the news you were hoping for.

Vinny

Hi @gerhold-ten-voorde
Yes, you are correct. Pin 56 is the signal "FORCE_USB_BOOT". It is default weakly pulled down by the SoC.
To enter eDL/QDL mode, this switch connects a 2-2.2K pullup to VREG_S4A_1P8 (J3 pin 47).
So, on M0154, the default OPEN/OFF position does noting, when ON it enables the pullup.
Hope that helps.
Thanks!
Vinny

Eric Katzfey

I think ImmersionRC was bought by Orqa.

Eric Katzfey

Yes, there is ground, power, and the transmit line from the receiver. The receive line to the receiver is not connected. But this is a 4 wire UART.

Eric Katzfey

It shows that no bytes have been received over the UART. So you need to see why there are no bytes coming across. Is the receiver generating any? You can attach a oscilloscope to the transmit line from the receiver and see if it is trying to send anything. Are you sure that the receiver and transmitter are properly bound?

Eric Katzfey

Looks like the px4- version of the command isn't printing anything. You'll need to stop px4 running as a service with systemctl stop voxl-px4. Then wait a few seconds. Then start voxl-px4 from the command line in non-daemon mode with voxl-px4 -d. Once the startup script completes and you get a px4 prompt enter qshell ghst_rc status.

Moderator

I wanted to inquire about the maximum input voltage of the VOXL FPV ESC.
On one hand, the data sheet states, that it is usable for 2-6S (6-26V), under performance it is stated as 40V.

For a project we were considering a 7S battery (maximum charge voltage 29.4V).
This is above the official maximum input voltage of the VOXL FPV ESC, but below 40V.

Could you advise, if it would be possible to use the FPV ESC with a 7S battery?

Thank you very much for your support.

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