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--- raspberypi_labs [2022/07/30 20:39] – frchris
+++ raspberypi_labs [2022/08/02 12:26] (current) – frchris
@@ Line 5: / Line 5: @@
     -[[Binary Counter]]
-In 2022 I got a Raspberry Pi4 400.  You can install [[https://www.bluej.org/raspberrypi|BlueJ]] on it too.
+In 2022 I got a Raspberry Pi4 400. Unfortunately, it is 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.  So that BlueJ finds it, I copied it over to the proper directory:
+<code>sudo cp /opt/pi4j/lib/*.jar /usr/share/bluej/userlib/</code>
+After that, I was able to plug in my breadboard, and all the old code in the labs listed above worked like a champ!