search

NVIDIA-AI-IOT / jetbot

An educational AI robot based on NVIDIA Jetson Nano.
MIT License
3k stars 1.02k forks source link

/collision_avoidance/live_demo robot.stop() not working #162

Closed DennisFaucher closed 2 years ago

DennisFaucher commented 4 years ago

Thanks for the great code. I'm up to the collision avoidance phase and everything is working. Yay. I cannot get my JetBot to stop running though once it has started. Any ideas? The code in the notebook does not stop the JetBot. TIA.

camera.unobserve(update, names='value') robot.stop()

jaybdub commented 4 years ago

Hi DennisFaucher,

Thanks for reaching out!

Actually, this is a small issue with the notebook. It turns out that after calling camera.unobserve, sometimes there will be 1 frame queued even after robot.stop is called (since they are in separate threads).

A quick workaround would be to add a small delay (ie: time.sleep(0.5)) after camera.unobserve.

Best, John

DennisFaucher commented 4 years ago

@jaybdub Thank you. I'll try this. I am also going to try and add GPU % to the OLED as I know models can take a while to load on the Nano (and the Xavier) before the next step can occur. Do you know where the code for the JetBot OLED is?

jaybdub commented 4 years ago

Cool! The display code is in stats.py. This script runs on boot.

https://github.com/NVIDIA-AI-IOT/jetbot/blob/master/jetbot/apps/stats.py

By the way, we did this in our JetCard project. But we haven't incorporated in JetBot yet.

In case it helps,

https://github.com/NVIDIA-AI-IOT/jetcard/blob/master/jetcard/utils.py

Best, John