Raspberry pi 2 pi4j gpio problems

[bockone]

hi ,

i bought a raspberry pi 2 model b , i installed java and pi4j sucessfully , but gpio doesn't run with it .... i can only with python script .
while with my old raspberry (rasberry pi model b 512 Mb) gpios are ok with pi4j.

someone can help me to understand why pi4j is incompatible with raspberry 2 ??

[DougieLawson]

Are you running the 1.0.1 pi4j snapshot? Are you running with WiringPi 2.31?

If not, try upgrading both of those.

[bockone]

i follow this guide : http://wiringpi.com/download-and-install/

i update wiring pi... at the end of guide with command " gpio readall " , i have a new map of raspberry pi 2.

but with java doesn't run ... i can only with python script .......

[bockone]

why doesn't go ? i update everithing ....

[Tominboston]

I have a pi2 B and am also using pi4j and the gpio is working fine, flashing all my LEDs etc. I just bought it and updated it all about a month ago.

[bockone]

me too !! i upgrage it at all but i m not able to run with pi4j

i saw the following script ... maybe i 've to put it somewhere ... where can i put the following script ??


NOTE: To compile programs with wiringPi, you need to add:
-lwiringPi
to your compile line(s) To use the Gertboard, MaxDetect, etc.
code (the devLib), you need to also add:
-lwiringPiDev
to your compile line(s).



normally i compile my java file example :

javac -classpath .:classes:/home/pi/Desktop/jetty/lib/'*' demo.java

and than run with:

sudo java -classpath .:classes:/home/pi/Desktop/jetty/lib/'*' demo

[Tominboston]

Maybe you should post your program you are trying to compile......

[bent55]

Hi,

I use pi4j for our JAVA program. We coded JAVA program with eclipse. We added pi4j library both eclipse and raspberry. I didn't remember how. However, I watched https://www.youtube.com/watch?v=D-cTUEKbJJA video and this video is very helpful. Also, we tried pi4j examples.

Also, pi4j pinout and raspberry pinout are different. Please check your pin. For example, physical 11th pin's name is GPIO_17 in raspberry but if you use pi4j library, you should use GPIO_00.

Raspberry pi 2 pinout : https://www.element14.com/community/ser ... IO_Pi2.png

Pi4j pinout : http://pi4j.com/pins/model-2b-rev1.html

If you look this example http://pi4j.com/example/listener.html ;
GPIO_02 is pi4j pinout and physical 13th pin.

Code: Select all

final GpioPinDigitalInput myButton = gpio.provisionDigitalInputPin(RaspiPin.GPIO_02, PinPullResistance.PULL_DOWN);