ofxPiMapper/FAQ.md

Frequently Asked Questions

This document might contain answers to your questions regarding ofxPiMapper and life in general.

1. How to launch ofxPiMapper on boot?

It depends whether you are using the addon example or are integrating ofxPiMapper into your application. In both cases you will have to run make to compile the binary.

1.1. Compile

Make sure that you understand whether you are using the example or building your own. Use cd to navigate to your project directory on the Raspberry Pi. In case you are using the example, the command to use should be similar to the following.

cd /home/pi/openFrameworks/addons/ofxPiMapper/example

Compile. Run the following command to do that.

make

The compiled binary of the application should appear in the bin directory of the project. Run the following command to launch the application.

/home/pi/openFrameworks/addons/ofxPiMapper/example/bin/example

1.2. Set up Cron

Cron is a job scheduler on UNIX-like systems. We are going to use the super user crontab to launch ofxPiMapper on boot. Use the following command to edit the crontab.

sudo crontab -e

If using it for the first time, you will be prompted to choose the text editor you want to use. Select "nano". Proceed. Add the following line in the file.

@reboot /home/pi/openFrameworks/addons/ofxPiMapper/example/bin/example

Hit ctrl + x to exit. Hit y to confirm changes of the file and enter to confirm the existing name of the file.

Congratulations! OfxPiMapper should start up after next system reboot.