Tag: error
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Nav2 Localisation not Loading a Default Map
Hi everyone, I finally have my diffdrive robot navigating with waypoints using Nav2 and this great tutorial. However, while trying to use a saved map for localization I ran into the following error: I had the following entry in my launch file: My map was also in the correct folder and valid output from the…
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Lidar Failing to Start – ROS2 and RaspberryPi
Hi everyone, I’m messing around with a diff-drive robot and have been hitting an intermittent issue with my Lidar: This turned out to be a low power issue. The Pi’s voltage had been dropping to about 4.5v as my 12v battery grew a little flat. Recharging the battery immediately fixed the issue. For a more…
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ros2 controller manager not available – articubot tutorials
Hey everyone,I’m currently working through a great tutorial series on youtube for ROS2. Unfortunately, I ran into a bit of an issue with a race condition in a launch file. The controller managers were timing out before Gazebo was able to launch. The author offers a suggestion to try using OnProcessExit to work around this…
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RaspberryPi Camera not detected – Ubuntu 20.04.5 LTS
Hi everyone, I ran into a bit of an issue with a RaspberryPi 4 running Ubuntu 20.04.5 this morning. Running vcgencmd get_camera should have returned supported=1 detected=1 but instead I was getting supported=0 detected=0. This was a bit of a hard one to track down with Google but I eventually came across a stackoverflow post…
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Spawn entity timeout in Gazebo from Ros2
Hi everyone, I’m currently following a tutorial to simulate a fairly basic lidar robot with ROS2 and Gazebo: https://www.youtube.com/watch?v=laWn7_cj434. Unfortunately, there have been a few updates since the tutorial was created and a number of the commands don’t map 1:1 (no copy and paste). While trying to create a launch file I ran into the…
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libgl error pic id driver null – ros2 turtlesim
Hi everyone, I’m currently following the ros2 turtlesim tutorial with Ubuntu on an M1 Mac with Parallels and Ubuntu. Unfortunately, I hit a ‘device not found’ when trying to start the control node. A bit of Googling revealed that 3D acceleration might not be enabled. To fix this, all you need to do is the…
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The Repository is not Signed – Ubuntu ros2 installation
Hi everyone, I’m currently installing ros2 on Ubuntu (with Parallels) and ran into the following error: I was following the official tutorial so I was little surprised to see this crop up. What I hadn’t realised was that I’d missed an error in the output dump while running sudo apt update: This was a clean…
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Errors pushing an image to a new ECR repo on AWS
Hey everyone, I normally use DigitalOcean or Azure for docker and kubernetes but have decided to give AWS a go this time around. I was following a guide on deploying an image to a new ECR repo and hit a couple of issues. The first was that running the login command output help options instead…
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Console.log output not appearing – AWS SAM Node.js
Hi everyone, I ran into a bit of an interesting issue today after updating AWS SAM. All of my node log output stopped appearing in my console locally. For now, there’s a pretty simple workaround: Append 2>&1 | tr “\r” “\n” (including quotes) to your start-api command and you should begin to see the output…
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failed to connect to the database: default addr for network unknown – MySql and Golang
Hey everyone, I’m currently setting up a mysql database on DigitalOcean and hit the following error when connecting: failed to connect to the database: default addr for “DATABASE_CONN_STR” network unknown Luckily this turned out to be a pretty easy fix. In the mysql driver repo you can see that the only scenario where this error…
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