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Meltdown and Spectre

Jan 31, 2018 · 4 min read

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Meltdown and Spectre are two big vulnearbilities found in Intel and AMD chips out of there. The vulenarbility is so huge it affects up to 1995 chips.

Esp8266 Music Machine

Nov 30, 2017 · 1 min read

en esp8266 · esp8266

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After months of esp8266 experimentation, I “just” discovered this little chip has also a I2S Audio digital interface. To discover it you must install the Arduino IDE adapter and code directly in C++ (brr, ok not a breeze but not boring like Java :)

Esp8266 your WiFi Embedded solution

Sep 3, 2017 · 2 min read

en esp8266 featured knowledgebase · esp8266

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Arduino is a great hardware for a lot of reason: easy to use, difficulto to break, it is a very solid 5-Volt board.

Vjdbc

Jul 1, 2017 · 1 min read

en software · java

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Vjdbc is a remote access for JDBC-Datasources developed more then ten years ago (last news are from 2007, with last comit from 2013.

Removing duplicate rows in PostgreSQL, Oracle and SQLite

Jun 15, 2017 · 1 min read

en knowledgebase sql · evil oracle postgresql sql

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Removing duplicate rows in PostgreSQL, Oracle and SQLite

Sometimes you need to remove nasty duplicate on a table, based on a subset of the column. On every big database there is something called “rowid” which can be used to indentify a column in a unique way. On PostgreSQL is called ctid, as we shall see: