1 Debugging libmraa {#debugging} 2 ================= 3 4 This page contains a few debugging tip. When filing an issue please go through 5 this list as it's the first thing we'll ask you to do. 6 7 ### Finding your mraa version 8 9 Getting the exact version of libmraa you're running is really important to us. 10 The best way to get this is to call mraa_get_version() or mraa.getVersion(). If 11 mraa returns x.x.x-dirty then your version was not built from a git tree or you 12 built out of tree (see our building doc) - or you don't have git installed. 13 14 ### Finding error logs 15 16 mraa logs pretty much everything that goes wrong to syslog. These days it'll go 17 to the systemd journal so check with `sudo journalctl -f` whilst running your 18 app or check all libmraa messages with `journalctl -t libmraa`. Grab all the 19 messages from the initialisation message right up to your last one. Using a 20 pastebin is always a good idea, I like dpaste.com. If your system does not have 21 systemd likely your log is in /var/log/messages or a similar location. 22 23 ### Common errors to check for 24 25 * Not running as root 26 * Incorrect IO pin numbers, mraa uses physical connector pin numbering see your 27 platform documentation for details 28 * Your platform is unsupported 29 * Using the wrong pin, check pin capabilities either using the API or your 30 platform documentation 31 32
