Motion detection & trigger generation from OAK Device

Hi SwapnilBhole
M8 has two pins that i believe are programmable.
https://docs.luxonis.com/projects/hardware/en/latest/pages/NG9097pro/#connectors
PIN1 - aux, script on how to read write -alex-luxonis/depthai-python400b6e0
PIN5 - GPIO9

Additionally the VBUSIN pin (M8 pin 5) can be programmed to output 5V (the feature of providing power to the connected accessory device), by driving GPIO 9 as output high. Depending on the application, this may serve as an output indicator by toggling it output high/low (but for low you may need to add a pull-down resistor to GND to discharge the residual voltage).
Added some code here:
alex-luxonis/depthai-python0434a97
VBUS_OUT_GPIO_CTRL = 9
GPIO.setup(VBUS_OUT_GPIO_CTRL, GPIO.OUT, GPIO.PULL_NONE)
GPIO.write(VBUS_OUT_GPIO_CTRL, 1) # Enable 5V output

UART example: https://docs.luxonis.com/projects/api/en/latest/samples/Script/script_uart/ - out of the box for 4P only

Thanks,
Jaka

Hi SwapnilBhole
There are examples for the SDK with triggers. https://docs.luxonis.com/projects/sdk/en/latest/features/conditional-actions/

I think you should be able to create a new action that sets the GPIO when trigger is activated.
Afaik there are no examples for the API at the time.

Thanks,
Jaka

Hi SwapnilBhole
Works fine on my side. Make sure to also update the depthai_sdk python package.

Thanks,
Jaka

Hi SwapnilBhole ,
I don't think the SDK is actually the best path to take for this. For motion detection - is that motion of some object in the view, or camera motion?

For object motion, you could look into:

• https://github.com/luxonis/depthai-experiments/tree/master/gen2-custom-models#difference-between-2-frames
• Feature Tracker - eg. if any feature on the frame moves by more than 0.2 (so 20% of the frame), there was some motion

For camera motion:

• IMU, look at accelerometer, demo here
• Feature tracker (same as above), if camera is moving, all/most features on the frame should move around.

Thoughts on these approaches?