Hi @Jetson-Nano
No difference in data rate on any MH board. They are all USB2 rates.

Hope that helped!

Hi @Jetson-Nano
Let me try to clarify to help:
The "-3" Plug in board variant https://www.modalai.com/collections/expansion-board/products/voxl-microhard-modem-usb-hub does this:

• Power to MH Modem, USB Interface, USB Power to Downstream Peripherals, and interfaces all through the J3 interface to VOXL 2

However, the "-2" Standalone Module https://www.modalai.com/collections/modems/products/mdk-m0048-2

• brings only USB over the J7 4-pin USB Interface .
• There is not enough power over that VBUS to power the MH Module and downstream peripherals. That is where the red 2-pin JST J8 comes in... That connector provides power to the MH radio AND power to Downstream USB devices.

So, if you originally had a -1 variant that you plugged into VOXL 2's J3, and you want to remove that interface, you will need to switch over to the -3 hardware variant product.

I think that was the info you were looking for and I hope I clarified that for you.

Hi @Jetson-Nano
If you do not use the J3 from VOXL 2 to power your Microhard that is the "-1" variant, you cannot power peripherals. You'll need to use the -2 variant with the red connector: https://www.modalai.com/collections/modems/products/mdk-m0048-2

VBUS in to the MH is not used for powering downstream USB VBUS ports.

@Allen-Wu Yes, there are multiple ways to use GPS hardware and data all controlled by PX4. Let me walk you through the possibilities in the order of coarse grain control to fine grain control below:

1. Unplugging the connector to the GPS unit: this will outright disable its capability (also losing magnetometer as well). In this case no gps data will be present in the system nor logged. This applies from power up to power down.

2. Disabling the GPS driver, done by using the PX4Shell and running "gps stop': GPS hardware is still running but data is not used by PX4 subsystems, hence why you still get raw data logged. You can access the PX4Shell via QGC-->[Analyze Tools]-->[MAVlink Console] (type 'help' will show you the command options). This is the scenario in the above video example.

3. Enable/Disable GPS processing: apply PX4 params.
   Apply params using these parameters will include GPS data in the position estimate along with VIO.

4. Removing GPS data in flight: you can just alter these 2 values to add/remove GPS data in the position estimate.
   EKF2_EV_CTRL
   EKF2_GPS_CTRL
   I'll refer to the QGC/PX4 docs on their function. note altering these in flight can cause jumps in the position estimate causing the drone to have aggressive, unpredictable motions until the position is reestablished.

From your request, it sounds like you want both VIO and GPS running, hence you can just apply option #3 until you're ready to turn off GPS.

@Jetson-Nano It should be no different than with any other flight controller hardware running PX4. The PX4 documentation should be able to explain how to do that.

@Jetson-Nano Yes, that should work. You should be able to send heartbeats from a Python script using pymavlink and connect to the flight controller via voxl-mavlink-server. Then you should start receiving all the normal messages sent out by the flight controller to the GCS which should include the RC channels message.

Hi @Jetson-Nano
Can you elaborate what you mean by "main" vs "aux"?
We provide 8 channels of PWM as you may know. Are you asking if we provide more than 8 natively?

Hi @FIREBIRD
I answered on your other post: https://forum.modalai.com/topic/4098/power-module

Hi @FIREBIRD
Our standard power module is the same for VOXL 2 and VOXL 2 Mini. We just change the voltage settings.
Here is the link and the best we have is a PCB step file for this design (board only, no cables):
https://docs.modalai.com/power-module-v3-datasheet/

Hope this helps!
Thanks!

Hi @Jetson-Nano
I think that can work. As long as your UART matches the voltage levels indicated here: https://docs.modalai.com/voxl2-connectors/ Voxl 2 does not know (or care) which carrier board you are using.
However, we cannot speak to the quality of that carrier board and if it can provide you all the features you desire, but we trust you know this already as a seasoned user