Turtlebot3 OpenCR problem
I’m new in turtlebot3, so first of all, sorry if I did not speak as a master :wink:
I have a problem setting up my TB3. I follow all the steps, but when I want to check Opencr as manual said:
sudo apt-get update the result is the following, any idea why is happening?
pi@raspberrypi:~ $ sudo apt-get update Hit:1 http://archive.raspberrypi.org/debian stretch InRelease Hit:2 http://raspbian.raspberrypi.org/raspbian stretch InRelease Get:3 http://packages.ros.org/ros/ubuntu stretch InRelease [4,673 B] Err:3 http://packages.ros.org/ros/ubuntu stretch InRelease The following signatures couldn't be verified because the public key is not av ailable: NO_PUBKEY F42ED6FBAB17C654 Fetched 4,673 B in 1s (3,532 B/s) Reading package lists... Done W: An error occurred during the signature verification. The repository is not up dated and the previous index files will be used. GPG error: http://packages.ros. org/ros/ubuntu stretch InRelease: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY F42ED6FBAB17C654 W: Failed to fetch http://packages.ros.org/ros/ubuntu/di... T he following signatures couldn't be verified because the public key is not avail able: NO_PUBKEY F42ED6FBAB17C654 W: Some index files failed to download. They have been ignored, or old ones used instead.
Thank's
