# Uncategorized **URL:** https://forum.ubiquityrobotics.com/c/uncategorized/1.md?page=3 [Latest](https://forum.ubiquityrobotics.com/latest.md) · [Categories](https://forum.ubiquityrobotics.com/categories.md) **Page:** 4 --- ## [ROS Melodic on Magni Silver - DIY](https://forum.ubiquityrobotics.com/t/ros-melodic-on-magni-silver-diy/790)
**Author:** [@bryan\_bot](https://forum.ubiquityrobotics.com/u/bryan_bot)\ **Replies:** 8\ **Last updated:** [June 21, 2021, 11:31am UTC](https://forum.ubiquityrobotics.com/t/ros-melodic-on-magni-silver-diy/790 "2021-06-21T11:31:42Z")
Hello Ubiquity Community! My colleagues and I have a Magni Silver on the way. We would like to run ROS Melodic in Ubuntu 18.04 on the Raspberry Pi4. We have our own Navigation stack and will be connecting additional sen… --- ## [Not enough space in /boot](https://forum.ubiquityrobotics.com/t/not-enough-space-in-boot/831)
**Author:** [@IngeniousDoc](https://forum.ubiquityrobotics.com/u/IngeniousDoc)\ **Replies:** 5\ **Last updated:** [June 20, 2021, 7:15pm UTC](https://forum.ubiquityrobotics.com/t/not-enough-space-in-boot/831 "2021-06-20T19:15:15Z")
I am trying to update my ubuntu system on the pi, but I always get a message mentioning I need more space on my /boot. I tried deleting some files, but that doesn’t work. Is there a way i can resize the boot file? EDIT:… --- ## [Are there users who need more static IO lines for driving leds or reading switches?](https://forum.ubiquityrobotics.com/t/are-there-users-who-need-more-static-io-lines-for-driving-leds-or-reading-switches/816)
**Author:** [@mjstn2011](https://forum.ubiquityrobotics.com/u/mjstn2011)\ **Replies:** 1\ **Last updated:** [June 19, 2021, 8:19am UTC](https://forum.ubiquityrobotics.com/t/are-there-users-who-need-more-static-io-lines-for-driving-leds-or-reading-switches/816 "2021-06-19T08:19:39Z")
A little market research here. We have from time to time seen users who want to had 5 or more lines of output for either LED indicators or some other fairly ‘slow’ signal. These users if they have a Sonar board they… --- ## [A small question in python](https://forum.ubiquityrobotics.com/t/a-small-question-in-python/828)
**Author:** [@IngeniousDoc](https://forum.ubiquityrobotics.com/u/IngeniousDoc)\ **Replies:** 1\ **Last updated:** [June 12, 2021, 2:37am UTC](https://forum.ubiquityrobotics.com/t/a-small-question-in-python/828 "2021-06-12T02:37:55Z")
So, I am trying to add the sonar range values to my code. I added the call back function in the same class. My question is, is the method in which I defined it means it’s accessible within the other functions? So, I … --- ## [Setting up the raspberry pi to work as hotspot](https://forum.ubiquityrobotics.com/t/setting-up-the-raspberry-pi-to-work-as-hotspot/827)
**Author:** [@IngeniousDoc](https://forum.ubiquityrobotics.com/u/IngeniousDoc)\ **Replies:** 3\ **Last updated:** [June 9, 2021, 7:01pm UTC](https://forum.ubiquityrobotics.com/t/setting-up-the-raspberry-pi-to-work-as-hotspot/827 "2021-06-09T19:01:57Z")
Hi all, So my team is trying to build a new image for the Magni robot using ROS Melodic and Ubuntu 18.04 on raspberry pi 4. We want to run the Magni in an outdoor environment, so we’d like to setup a similar hotspot con… --- ## [Sonar Board Problem!](https://forum.ubiquityrobotics.com/t/sonar-board-problem/823)
**Author:** [@tiho\_bg](https://forum.ubiquityrobotics.com/u/tiho_bg)\ **Replies:** 2\ **Last updated:** [June 2, 2021, 5:21pm UTC](https://forum.ubiquityrobotics.com/t/sonar-board-problem/823 "2021-06-02T17:21:12Z")
Hi I would like to read one of the sonars included in Magni Robot. I saw that not all the time I receive the correct data from the sonar. Here is my code: #!/usr/bin/env python import rospy from geometry\_msgs.msg imp… --- ## [How to connect an external hardware to magni robot?](https://forum.ubiquityrobotics.com/t/how-to-connect-an-external-hardware-to-magni-robot/817)
**Author:** [@tiho\_bg](https://forum.ubiquityrobotics.com/u/tiho_bg)\ **Replies:** 10\ **Last updated:** [May 24, 2021, 7:51pm UTC](https://forum.ubiquityrobotics.com/t/how-to-connect-an-external-hardware-to-magni-robot/817 "2021-05-24T19:51:20Z")
Hi I’m using magni silver with a sonar board. I would like to control an external hardware through one relay. Could you please help me with any free raspberry pin and any tutorial how to control the relay with the magni… --- ## [I just want my bot to wander around avoiding obstacles](https://forum.ubiquityrobotics.com/t/i-just-want-my-bot-to-wander-around-avoiding-obstacles/793)
**Author:** [@FolsomMike](https://forum.ubiquityrobotics.com/u/FolsomMike)\ **Replies:** 2\ **Last updated:** [April 12, 2021, 1:13am UTC](https://forum.ubiquityrobotics.com/t/i-just-want-my-bot-to-wander-around-avoiding-obstacles/793 "2021-04-12T01:13:25Z")
Is there any code out there that will just let my bot wander around exploring while avoiding obstacles using Sonar alone? No fiducials, no Lidar, no maps, no goals…just wandering around? --- ## [Minimum Turn Control](https://forum.ubiquityrobotics.com/t/minimum-turn-control/814)
**Author:** [@boarderkris](https://forum.ubiquityrobotics.com/u/boarderkris)\ **Replies:** 4\ **Last updated:** [May 12, 2021, 3:45am UTC](https://forum.ubiquityrobotics.com/t/minimum-turn-control/814 "2021-05-12T03:45:37Z")
Good day folks, I’m running our magni(s) at 0.14 m/s linear (fairly slow), and after testing the turning angual movements with teleop\_twist\_keyboard, I’ve noticed the lowest angular turn I can do is around 0.028. ie. … --- ## [Getting errors in recent pip version](https://forum.ubiquityrobotics.com/t/getting-errors-in-recent-pip-version/815)
**Author:** [@FFelizpe](https://forum.ubiquityrobotics.com/u/FFelizpe)\ **Replies:** 1\ **Last updated:** [May 11, 2021, 10:15pm UTC](https://forum.ubiquityrobotics.com/t/getting-errors-in-recent-pip-version/815 "2021-05-11T22:15:51Z")
Hello there! Recently, I’ve been trying to use some new python libraries for a project I’ve been building, and when trying to install these libraries, pip asked for an upgrade, from version 8 to version 21. As that was … --- ## [Installing intel Realsense Camera d435 librealsense error](https://forum.ubiquityrobotics.com/t/installing-intel-realsense-camera-d435-librealsense-error/810)
**Author:** [@IngeniousDoc](https://forum.ubiquityrobotics.com/u/IngeniousDoc)\ **Replies:** 5\ **Last updated:** [May 5, 2021, 2:49am UTC](https://forum.ubiquityrobotics.com/t/installing-intel-realsense-camera-d435-librealsense-error/810 "2021-05-05T02:49:39Z")
I am trying to install the camera to use it for the robot, however when I install librealsense2 for the ros-kinetic distro, and the try to upgrade it gives me the following error: if you need any extra information, … --- ## [How do I install intelRealSense d435?](https://forum.ubiquityrobotics.com/t/how-do-i-install-intelrealsense-d435/811)
**Author:** [@IngeniousDoc](https://forum.ubiquityrobotics.com/u/IngeniousDoc)\ **Replies:** 1\ **Last updated:** [May 3, 2021, 11:44pm UTC](https://forum.ubiquityrobotics.com/t/how-do-i-install-intelrealsense-d435/811 "2021-05-03T23:44:29Z")
I have been trying to install intel realsense camera for the magni, but I have been running into quite a lot walls. I was wondering if anyone has had any experience with installing this camera and could share some knowl… --- ## [Adding a sonar Range subscriber c++](https://forum.ubiquityrobotics.com/t/adding-a-sonar-range-subscriber-c/813)
**Author:** [@IngeniousDoc](https://forum.ubiquityrobotics.com/u/IngeniousDoc)\ **Replies:** 7\ **Last updated:** [May 1, 2021, 4:14pm UTC](https://forum.ubiquityrobotics.com/t/adding-a-sonar-range-subscriber-c/813 "2021-05-01T16:14:20Z")
So I am trying to add a subscriber to a specific node. The purpose of the subscriber is to get range messages from the pi\_sonar topic and use it in the code. This is the code here so, if I wanted to add the sonar m… --- ## [Importing Sonar library instead of LaserScan](https://forum.ubiquityrobotics.com/t/importing-sonar-library-instead-of-laserscan/803)
**Author:** [@IngeniousDoc](https://forum.ubiquityrobotics.com/u/IngeniousDoc)\ **Replies:** 4\ **Last updated:** [April 28, 2021, 6:30am UTC](https://forum.ubiquityrobotics.com/t/importing-sonar-library-instead-of-laserscan/803 "2021-04-28T06:30:15Z")
So, this question is a little primitive I guess but I don’t completely understand how does this work. So for the code that I found, it is importing the LaserScan messages in the beginning of the code and not mentioning … --- ## [Lane detection methods: General Question](https://forum.ubiquityrobotics.com/t/lane-detection-methods-general-question/809)
**Author:** [@IngeniousDoc](https://forum.ubiquityrobotics.com/u/IngeniousDoc)\ **Replies:** 1\ **Last updated:** [April 26, 2021, 9:28am UTC](https://forum.ubiquityrobotics.com/t/lane-detection-methods-general-question/809 "2021-04-26T09:28:07Z")
I am currently using the turtlebot3 lane detection project, provided on the following website: https://emanual.robotis.com/docs/en/platform/turtlebot3/overview/ From what I understood from the code is that it requires … --- ## [Install ros-i2cpwmboard](https://forum.ubiquityrobotics.com/t/install-ros-i2cpwmboard/805)
**Author:** [@barabba](https://forum.ubiquityrobotics.com/u/barabba)\ **Replies:** 4\ **Last updated:** [April 21, 2021, 7:56pm UTC](https://forum.ubiquityrobotics.com/t/install-ros-i2cpwmboard/805 "2021-04-21T19:56:03Z")
Hi all I am trying to install ros-i2cpwmboard on my Rasperry Pi3 with Ubiquityrobot. Unfortunately, I have this message: fatal: unable to access “https: //git@gitlab.com: bradanlane / ros-i2cpwmboard.git /”: Unable to… --- ## [Transferring Files to the Pi using FTP](https://forum.ubiquityrobotics.com/t/transferring-files-to-the-pi-using-ftp/802)
**Author:** [@FolsomMike](https://forum.ubiquityrobotics.com/u/FolsomMike)\ **Replies:** 5\ **Last updated:** [April 19, 2021, 3:58pm UTC](https://forum.ubiquityrobotics.com/t/transferring-files-to-the-pi-using-ftp/802 "2021-04-19T15:58:35Z")
When I fired up Filezilla to transfer files from my laptop to the Magni Pi, I found that the Pi seems not to have an FTP server installed. I installed vsftpd and got things working after a bit of tweaking. Am I followi… --- ## [Setting up workstation in environment with WiFi Repeaters](https://forum.ubiquityrobotics.com/t/setting-up-workstation-in-environment-with-wifi-repeaters/801)
**Author:** [@IngeniousDoc](https://forum.ubiquityrobotics.com/u/IngeniousDoc)\ **Replies:** 0\ **Last updated:** [April 18, 2021, 4:09pm UTC](https://forum.ubiquityrobotics.com/t/setting-up-workstation-in-environment-with-wifi-repeaters/801 "2021-04-18T16:09:28Z")
So, this is a simple thing that I encountered and surprisingly took me quite a while to understand. If you are trying to connect your robot to an environment where the wifi has repeaters. In my case, I am using my unive… --- ## [Image not viewing on rqt](https://forum.ubiquityrobotics.com/t/image-not-viewing-on-rqt/798)
**Author:** [@IngeniousDoc](https://forum.ubiquityrobotics.com/u/IngeniousDoc)\ **Replies:** 7\ **Last updated:** [April 18, 2021, 3:51pm UTC](https://forum.ubiquityrobotics.com/t/image-not-viewing-on-rqt/798 "2021-04-18T15:51:54Z")
I’m trying to use the turbtlebot3 tutorial for lane detection. https://emanual.robotis.com/docs/en/platform/turtlebot3/autonomous\_driving/#camera-calibration I am trying to view an image there but for some reason it i… --- ## [Spud the Bot ~ progress](https://forum.ubiquityrobotics.com/t/spud-the-bot-progress/800)
**Author:** [@FolsomMike](https://forum.ubiquityrobotics.com/u/FolsomMike)\ **Replies:** 5\ **Last updated:** [April 17, 2021, 10:21am UTC](https://forum.ubiquityrobotics.com/t/spud-the-bot-progress/800 "2021-04-17T10:21:52Z")
Will be adding a Lidar this weekend along with a simple “follow me” mode. A walk in the park is coming soon! Processing power (so far): Raspberry Pi 4b in head Jetson Nano in head Raspberry Pi 4b in torso Jetson … --- ## [Running lane detection Node](https://forum.ubiquityrobotics.com/t/running-lane-detection-node/797)
**Author:** [@IngeniousDoc](https://forum.ubiquityrobotics.com/u/IngeniousDoc)\ **Replies:** 0\ **Last updated:** [April 13, 2021, 12:19pm UTC](https://forum.ubiquityrobotics.com/t/running-lane-detection-node/797 "2021-04-13T12:19:21Z")
So I am using the turtlebot race 2020 package on github. But I am facing an error with trying to open the image viewer. I get this error: I am using the following turtlebot tutorial: EDIT: Fixed this by going to wo… --- ## [An error with C++ code for running lane detection node](https://forum.ubiquityrobotics.com/t/an-error-with-c-code-for-running-lane-detection-node/792)
**Author:** [@Beedz](https://forum.ubiquityrobotics.com/u/Beedz)\ **Replies:** 1\ **Last updated:** [April 12, 2021, 6:01am UTC](https://forum.ubiquityrobotics.com/t/an-error-with-c-code-for-running-lane-detection-node/792 "2021-04-12T06:01:27Z")
Hi guys, I’m working on an OpenCV tutorial for lane detection. I’m trying to run the lane detection node but it keeps giving me this error. This is a picture of the line that has the error: Can someone please he… --- ## [How to start learning ROS with ubiquity?](https://forum.ubiquityrobotics.com/t/how-to-start-learning-ros-with-ubiquity/783)
**Author:** [@tiho\_bg](https://forum.ubiquityrobotics.com/u/tiho_bg)\ **Replies:** 3\ **Last updated:** [April 8, 2021, 4:47pm UTC](https://forum.ubiquityrobotics.com/t/how-to-start-learning-ros-with-ubiquity/783 "2021-04-08T16:47:08Z")
Hello! I would like to start programming my magni robot. Where I can start from? Could you please give me an advise how to start with ROS and ubiquity robot. I launched all the applications described from the ubuiquity … --- ## [Using catkin build after using catkin\_make](https://forum.ubiquityrobotics.com/t/using-catkin-build-after-using-catkin-make/786)
**Author:** [@Beedz](https://forum.ubiquityrobotics.com/u/Beedz)\ **Replies:** 1\ **Last updated:** [April 6, 2021, 8:43pm UTC](https://forum.ubiquityrobotics.com/t/using-catkin-build-after-using-catkin-make/786 "2021-04-06T20:43:57Z")
Hi guys, so I’ve been using “catkin\_make” to build packages, but there is this package that can only be built using “catkin build” (neither catkin\_make nor catkin\_make\_isolated) and it’s giving me such a hard time buildi… --- ## [Can I install tensorflow for python 2.7 on ROS?](https://forum.ubiquityrobotics.com/t/can-i-install-tensorflow-for-python-2-7-on-ros/784)
**Author:** [@IngeniousDoc](https://forum.ubiquityrobotics.com/u/IngeniousDoc)\ **Replies:** 0\ **Last updated:** [April 6, 2021, 6:27pm UTC](https://forum.ubiquityrobotics.com/t/can-i-install-tensorflow-for-python-2-7-on-ros/784 "2021-04-06T18:27:47Z")
I am trying to run a specific package and it uses tensorflow. Is tensorflow available for python 2.7? in your experience has it ever caused any complications? --- ## [Raspberry Pi4 possible cooling solution](https://forum.ubiquityrobotics.com/t/raspberry-pi4-possible-cooling-solution/782)
**Author:** [@mjstn2011](https://forum.ubiquityrobotics.com/u/mjstn2011)\ **Replies:** 0\ **Last updated:** [April 3, 2021, 7:39am UTC](https://forum.ubiquityrobotics.com/t/raspberry-pi4-possible-cooling-solution/782 "2021-04-03T07:39:33Z")
Many forums and other discussions point out that the Raspberry Pi 4 can run very hot. I am sharing here something I am looking into that is not ideal but is compatible with mounting on the Pi4 and still have the Pi4 be … --- ## [Failed to create camera component](https://forum.ubiquityrobotics.com/t/failed-to-create-camera-component/388)
**Author:** [@nelson](https://forum.ubiquityrobotics.com/u/nelson)\ **Replies:** 5\ **Last updated:** [March 30, 2021, 9:55pm UTC](https://forum.ubiquityrobotics.com/t/failed-to-create-camera-component/388 "2021-03-30T21:55:20Z")
Hi, I started the robot and connected with workstation, when I run command ‘roslaunch magni\_demos simple\_navigation.launch’ I received error ‘failed to create camera component’. Could you please help me understand what … --- ## [SSH into magni after adding wifi network](https://forum.ubiquityrobotics.com/t/ssh-into-magni-after-adding-wifi-network/779)
**Author:** [@IngeniousDoc](https://forum.ubiquityrobotics.com/u/IngeniousDoc)\ **Replies:** 0\ **Last updated:** [March 30, 2021, 5:45pm UTC](https://forum.ubiquityrobotics.com/t/ssh-into-magni-after-adding-wifi-network/779 "2021-03-30T17:45:31Z")
after I change the host name of the magni, and then afterwards add my wifi connection, I become no longer able to ping or ssh into my magni. Is there any reason for this happening? UPDATE: I didn’t really do anything bu… --- ## [For Sale: Used Ubiquity Magni Base + 2x 35Ah Batteries + Slamtec A2M6 LIDAR](https://forum.ubiquityrobotics.com/t/for-sale-used-ubiquity-magni-base-2x-35ah-batteries-slamtec-a2m6-lidar/753)
**Author:** [@ravi](https://forum.ubiquityrobotics.com/u/ravi)\ **Replies:** 2\ **Last updated:** [March 29, 2021, 10:44pm UTC](https://forum.ubiquityrobotics.com/t/for-sale-used-ubiquity-magni-base-2x-35ah-batteries-slamtec-a2m6-lidar/753 "2021-03-29T22:44:58Z")
Is anyone in need of a used Ubiquity Magni? My startup bought a brand new Magni less than a year ago (April 2020) but we’re not in the robotics field anymore. Everything works. One Sonar sensor is dented but can be easil… --- ## [Design Adjustment Suggestion: CRUCIAL TO SAFETY](https://forum.ubiquityrobotics.com/t/design-adjustment-suggestion-crucial-to-safety/773)
**Author:** [@IngeniousDoc](https://forum.ubiquityrobotics.com/u/IngeniousDoc)\ **Replies:** 2\ **Last updated:** [March 28, 2021, 8:37am UTC](https://forum.ubiquityrobotics.com/t/design-adjustment-suggestion-crucial-to-safety/773 "2021-03-28T08:37:04Z")
So, the other day I was working on the Magni and I wanted to adjust the position of the camera and move it around. Accidentally the camera slipped inside the casing (the front side of course) and it somehow managed to sp… [Previous page](https://forum.ubiquityrobotics.com/c/uncategorized/1.md?page=2) [Next page](https://forum.ubiquityrobotics.com/c/uncategorized/1.md?page=4)