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--- getting_the_wiring_right [2018/08/11 01:54] – frchris
+++ getting_the_wiring_right [2022/08/03 11:25] (current) – frchris
@@ Line 1: / Line 1: @@
-In my Preinstalled BlueJ IDE, the Pi4J library that was preinstalled in the directory ''/usr/share/bluej/userlib/'' had older versions that 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]],
+====== Getting the Wiring Right ======
+===== Raspberry Pi 3+ =====
+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
 <code>
@@ Line 7: / Line 13: @@
 because the new ''jar'' files of the Pi4j were stored in ''/opt/pi4j/lib/'' and ignored by BlueJ because of the old version in ''/usr/share/bluej/userlib/''.
-Descriptions of the [[http://pi4j.com/pins/model-3b-plus-rev1.html|new pin out numbers]] and [[http://pi4j.com/usage.html|usage]] are at [[http://Pi4j.org]].
+Descriptions of the [[http://pi4j.com/pins/model-3b-plus-rev1.html|new pin out numbers]] and [[http://pi4j.com/usage.html|usage]] are at [[http://Pi4j.com]].
  {{http://pi4j.com/images/j8header-3b.png}}
@@ Line 43: / Line 49: @@
 </code>
 The kit I bought from CanaKit had wriiten the BCM numbers, but I needed to program with the wPi numbers.
+===== Raspberry Pi 400 =====
+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]]