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--- getting_the_wiring_right [2022/07/30 20:26] – frchris
+++ getting_the_wiring_right [2022/08/03 11:24] – frchris
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+====== Getting the Wiring Right ======
 In 2018 the Preinstalled BlueJ IDE, the Pi4J library that was in the directory ''/usr/share/bluej/userlib/''  did not recognize my new pi 3 B+. After [[http://wiringpi.com/wiringpi-updated-for-the-pi-v3plus/|installing the latest WiringPi]] and [[http://pi4j.com/install.html|intalling the latest Pi4J]],
 I still had to
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 The kit I bought from CanaKit had wriiten the BCM numbers, but I needed to program with the wPi numbers.
-In 2020 v.2 was ready.  Go to [[https://pi4j.com/architecture/about-the-code/download/]].  To get the new code, go to [[https://github.com/Pi4J/pi4j-v2|github/pi4j-v2]].
+In 2022 I got a Raspberry Pi4 400. Unfortunately, it was so new, the old gpio -v gave me the message "Oops - unable to determine board type... model: 19"
+I found some help at [[https://pi4j.com/1.4/install.html]].  I followed the "Easy Method" which produced the {{ ::pi4j-core.jar}} file that I needed.  In order for BlueJ to find it, I copied it over to the proper directory:
+<code>sudo cp /opt/pi4j/lib/*.jar /usr/share/bluej/userlib/</code>
+[[https://pi4j.com/1.3/pins/rpi-400.html| GPIO pins on the 400]]
-In 2021 v.1.4 became the last update of v.1