https://github.com/ros2/ros2/wiki/Logging-and-logger-configuration links to the source code of a logging demo that has different usage examples in C++. The suggestion from @mig to set the logger level to debug is also appropriate (your macro call is using the unnamed logger at the moment). We recommend using named logger objects as in the logging demo, especially for nodes, so that if the node name gets remapped the logger name will get remapped also.