MariaDB, HikariCP and connection lifetime
How to properly configure Hikari connection lifetime with MariaDB.
Measure CO2 with Senseair S8 and a Raspberry Pi
Learn how to measure CO2 levels in the air with the low-cost Senseair sensor and a Raspberry Pi.
YAML configuration for Log4J and Syslog
An example of a Log4J 2.x configuration in YAML format for syslog.
Measure temperature, humidity and air pressure with RuuviTags, Raspberry Pi and Java
Learn how to measure temperature, humidity and air pressure with RuuviTag sensors and use Raspberry Pi and Java code to collect and process the data.
Measure air quality with Raspberry Pi, PMS7003 and Java
Learn how to build an air quality monitoring device with a PMS7003 sensor, Raspberry Pi and some Java code. Help raise awareness about air pollution.
How to map a collection of Enums to a column with Hibernate
Learn how you can create a custom Hibernate type to map a collection of enums to a single column in the relational database table.
How to install Java 11 on a Raspberry Pi
Learn how to install Java 11 (OpenJDK) on a Raspberry Pi with a Raspbian/Debian/Ubuntu or similar OS.