@Eric-Katzfey How can I control those PWM signals? Since at the moment I am not reading anything from any of the pins.

@Eric-Katzfey Correct me if I am wrong, but doesn't the ESC only have enough motor outputs for each of the propellers? So to add another PWM signal I need to either use a GPIO pin or the expansion voxl2 IO board

@Eric-Katzfey I’m trying to control the gripper using a Python script running in a Docker container on Linux. My plan is to use pymavlink to listen for remote controller commands, like a specific channel input, and then trigger the gripper based on that input. So I think it's not integrated directly as a PX4 driver; it’s more of a companion application running alongside PX4 that reacts to MAVLink messages in real time.

@tonygurney I am also using a ghost atto as my receiver

@Eric-Katzfey I am looking to attach a gripper to the drone

Hello ModalAI Team,

I was wondering if you have a specific guide or documentation on how to install the VOXL IO on the Sentinel drone. I’ve run into a couple of issues regarding available QUP ports:

The QUP2 port (J18) is currently occupied by the ESC.

The QUP7 (J16) port has its RX line already in use by the receiver for my remote controller. Pin 11 is already being used.

Given this setup, am I expected to remove the ESC and rewire the motors to the VOXL IO? Or is there an alternate recommended configuration for integrating the VOXL IO on the Sentinel platform?

Any guidance or examples you could provide would be greatly appreciated.

Hello ModalAI Team,

I’m currently trying to test the output of GPIO pin 46 on the VOXL and haven’t seen any voltage change using a multimeter.

Here’s what I’ve tried so far:
echo 1 > /sys/class/gpio/gpio1146/value
echo 0 > /sys/class/gpio/gpio1146/value

I also tried using the VOXL utility commands:
voxl-gpio -w 46 1 and voxl-gpio -w 46 0

I have also check that the pin was set output

In all cases, there was no measurable voltage change observed on my multimeter.

Is there something I may be missing in the configuration, or is there an initialization step required for GPIO 46?

Thank you for your help!

Re: GPIO numbering

In this example @Viswanadh-Chegu is able to find the offset for for J8 pin 12 but how would you do that for all the other connectors that might have gpio pins?

I am specifically looking for J10 pin 6 but nonetheless I would like to learn the methodology