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THIS GROUP IS NO LONGER ACTIVE, PLEASE SEE
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Roel Janssen
,
GeertVc
2
7/14/19
Q&A
SPI usage with ADC MCP3008
Maybe this website might help you in understanding the SpiChannel.CS0 meaning: https://pinout.xyz/
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gpio
pi4j
spi
Q&A
SPI usage with ADC MCP3008
Maybe this website might help you in understanding the SpiChannel.CS0 meaning: https://pinout.xyz/
7/14/19
Ronnie76
, …
Andrew Chandler
4
7/14/19
Q&A
error: unreported exception UnsupportedBusNumberException; must be caught or declared to be thrown
Oh that is awesome news Geert!
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MCP23017
gpio
i2c
java
pi4j
raspberrypi
rpi
Q&A
error: unreported exception UnsupportedBusNumberException; must be caught or declared to be thrown
Oh that is awesome news Geert!
7/14/19
Santiago Lovera
, …
Robert Savage
3
3/18/19
Q&A
Camera Module - Why does not exist on PI4J?
Paul is correct, Pi4J is focused on providing Java programmers access to the raw I/O communications
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gpio
Q&A
Camera Module - Why does not exist on PI4J?
Paul is correct, Pi4J is focused on providing Java programmers access to the raw I/O communications
3/18/19
Robert Savage
2/28/19
Announcement
Pi4J VERSION 1.2 IS RELEASED!
Version 1.2 of the Pi4J Library is finally released! http://www.savagehomeautomation.com/pi4j-1.2 The
unread,locked,
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java
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Announcement
Pi4J VERSION 1.2 IS RELEASED!
Version 1.2 of the Pi4J Library is finally released! http://www.savagehomeautomation.com/pi4j-1.2 The
2/28/19
Marko Uhan
,
Andreas Kuhtz
2
7/23/18
Q&A
Issue with pi4j on Raspberry Pi 3 v1.2
Hi, Maybe this helps: https://github.com/Pi4J/pi4j/issues/319 Regards, Andreas Am Montag, 23. Juli
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pi4j
Q&A
Issue with pi4j on Raspberry Pi 3 v1.2
Hi, Maybe this helps: https://github.com/Pi4J/pi4j/issues/319 Regards, Andreas Am Montag, 23. Juli
7/23/18
Developer42
5/10/18
Q&A
How to Translate code Python to Java Pi4j
Hello eveybody, I need help, I wrote the following code in python and how can I do it using pi4j Java
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gpio
java
pi4j
Q&A
How to Translate code Python to Java Pi4j
Hello eveybody, I need help, I wrote the following code in python and how can I do it using pi4j Java
5/10/18
Dzmitry Suhlob
5/4/18
Q&A
please, help Me.
How to deduce on seven-segment display by means of library pi4j using raspberry pi3? On which pins to
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gpio
java
pi4j
raspberrypi
Q&A
please, help Me.
How to deduce on seven-segment display by means of library pi4j using raspberry pi3? On which pins to
5/4/18
Steven F. Le Brun
, …
Robert Savage
3
4/23/18
Q&A
Raspberry Pi 3 B+ and pi4j not playing well together.
All, I was able to update the Pi4J 1.2-SNAPSHOT build today with the latest WiringPi. I have not had
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gpio
java
pi4j
raspberrypi
rpi
Q&A
Raspberry Pi 3 B+ and pi4j not playing well together.
All, I was able to update the Pi4J 1.2-SNAPSHOT build today with the latest WiringPi. I have not had
4/23/18
Tom Moyer
2/9/18
Scala Java maven project in ScalaIDE Eclipse workspace with demo code for MMA8451 in both languages
Have started a project involving the Raspberry Pi and prefer to program in Scala. Was able to port
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gpio
i2c
java
pi4j
raspberrypi
Scala Java maven project in ScalaIDE Eclipse workspace with demo code for MMA8451 in both languages
Have started a project involving the Raspberry Pi and prefer to program in Scala. Was able to port
2/9/18
dwa...@millersoftwaresolutions.com
12/24/17
Q&A
pi4j and MCP23017 - reading and writing device registers
I have connected an Adafruit 16x2 plate that uses the MCP23017 expander to control a 16x2 LCD display
unread,
MCP23017
gpio
i2c
java
pi4j
Q&A
pi4j and MCP23017 - reading and writing device registers
I have connected an Adafruit 16x2 plate that uses the MCP23017 expander to control a 16x2 LCD display
12/24/17
Mark Wilson
11/27/17
Q&A
Blinking Pi Zero Activity LED
Hi, I have been reading that it is possible to turn on and off the activity LED on the Pi Zero (the
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gpio
java
pi
pi4j
raspberrypi
Q&A
Blinking Pi Zero Activity LED
Hi, I have been reading that it is possible to turn on and off the activity LED on the Pi Zero (the
11/27/17
SylZi
2
11/14/17
Q&A
How to get value of voltage from ADS1015
Here I found solution: https://stackoverflow.com/questions/15705843/how-do-i-best-return-a-value-from
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gpio
java
pi4j
Q&A
How to get value of voltage from ADS1015
Here I found solution: https://stackoverflow.com/questions/15705843/how-do-i-best-return-a-value-from
11/14/17
Olivier Le Diouris
6/12/17
Q&A
Exception in SoftPwmExample
Using 1.2-SNAPSHOT, I am trying to run the sample at https://github.com/Pi4J/pi4j/blob/master/pi4j-
unread,
gpio
pi4j
raspberrypi
Q&A
Exception in SoftPwmExample
Using 1.2-SNAPSHOT, I am trying to run the sample at https://github.com/Pi4J/pi4j/blob/master/pi4j-
6/12/17
Edward Roberts
4/23/17
Q&A
WiringPi still needs to run as root?
I have a working java application that I would like to add a gui to. When I run it as non-root (in
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gpio
java
pi4j
Q&A
WiringPi still needs to run as root?
I have a working java application that I would like to add a gui to. When I run it as non-root (in
4/23/17
Brian Acken
,
Robert Savage
3
2/28/17
Q&A
Is there a way to trigger GPIO event based on time of day or possibly every few days?
Thank you! I'll take a look at this On Tuesday, February 28, 2017 at 12:22:28 PM UTC-5, Robert
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Q&A
Is there a way to trigger GPIO event based on time of day or possibly every few days?
Thank you! I'll take a look at this On Tuesday, February 28, 2017 at 12:22:28 PM UTC-5, Robert
2/28/17
Aaron Lager
2/15/17
Q&A
serial configuration and 9 bit, mark, space and timming
I've got a few questions about the serial interface that I couldn't figure out from the code
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gpio
pi4j
raspberrypi
rpi
serial
uart
Q&A
serial configuration and 9 bit, mark, space and timming
I've got a few questions about the serial interface that I couldn't figure out from the code
2/15/17
GeertVc
,
Robert Savage
2
2/8/17
Q&A
Measuring time between press and release of a button?
Hi GertVc, Nothing like that exists currently at the GPIO layer. However, there is a "Button
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MCP23017
gpio
i2c
Q&A
Measuring time between press and release of a button?
Hi GertVc, Nothing like that exists currently at the GPIO layer. However, there is a "Button
2/8/17
Bashar A.Asaad
10/12/16
Q&A
SerialDataEvent.lenght = 0 ?????
Hello all SerialDataEvent.lenght = 0 ????? i must put this code if (SerialDataEvent.length() != 0 )
unread,
MCP23008
MCP23017
gpio
java
pi4j
raspberrypi
serial
Q&A
SerialDataEvent.lenght = 0 ?????
Hello all SerialDataEvent.lenght = 0 ????? i must put this code if (SerialDataEvent.length() != 0 )
10/12/16
NM
,
Robert Savage
3
9/21/16
Q&A
Using DACs/ADCs with Pi4J
Thank you for this hint, I just edited the MCP3202 classes and I will report to you if it works or
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gpio
spi
Q&A
Using DACs/ADCs with Pi4J
Thank you for this hint, I just edited the MCP3202 classes and I will report to you if it works or
9/21/16
GeertVc
2
8/21/16
Q&A
GpioProviderBase: cache array too small when passing MCP23017 pins, even with the dynamic improvments done (see Fix #224)
I think I can already answer the question I asked at the end of the above post myself: I've seen
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MCP23017
gpio
i2c
Q&A
GpioProviderBase: cache array too small when passing MCP23017 pins, even with the dynamic improvments done (see Fix #224)
I think I can already answer the question I asked at the end of the above post myself: I've seen
8/21/16
Robert Savage
7/27/16
Announcement
The Pi4J Project now includes support for Odroid C1/C1+ and Odroid XU4!
The Pi4J Project (as of version 1.1) now includes support for Odroid C1/C1+ and Odroid Xu4! This
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c1
gpio
i2c
odroid
pi4j
serial
spi
xu4
Announcement
The Pi4J Project now includes support for Odroid C1/C1+ and Odroid XU4!
The Pi4J Project (as of version 1.1) now includes support for Odroid C1/C1+ and Odroid Xu4! This
7/27/16
Robert Savage
2
7/27/16
Announcement
Pi4J VERSION 1.1 IS RELEASED!
Pi4J Version 1.1 has now been synced to the Maven Central Repository. http://search.maven.org/#search
unread,locked,
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gpio
java
notice
pi4j
raspberrypi
release
rpi
Announcement
Pi4J VERSION 1.1 IS RELEASED!
Pi4J Version 1.1 has now been synced to the Maven Central Repository. http://search.maven.org/#search
7/27/16
lul...@163.com
,
Robert Savage
2
7/25/16
Q&A
What is mean of provider?
The Provider interface allows for multiple "board" or "chipsets" to provide GPIO
unread,
gpio
pi4j
programming
Q&A
What is mean of provider?
The Provider interface allows for multiple "board" or "chipsets" to provide GPIO
7/25/16
Tom Tibbetts
,
Robert Savage
4
4/23/16
Q&A
Introducing a new way to configure the Raspberry Pi using a web interface.
Code repository is posted: https://github.com/tomtibbetts/Breezy I finally learned basic Github and
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MCP23017
gpio
java
jdk8
pi-face
pi4j
piface
raspberrypi
Q&A
Introducing a new way to configure the Raspberry Pi using a web interface.
Code repository is posted: https://github.com/tomtibbetts/Breezy I finally learned basic Github and
4/23/16
Cata
,
Robert Savage
2
3/14/16
Q&A
Android usage
Hi Cata, I don't have any experience attempting to use Pi4J on Android. Pi4J relies heavily on
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gpio
pi
Q&A
Android usage
Hi Cata, I don't have any experience attempting to use Pi4J on Android. Pi4J relies heavily on
3/14/16
Jorgen Wortel
, …
Robert Savage
4
3/16/16
Q&A
RCSwitch implementation works in Pi4j 0.0.5 and not in 1.0
How can I help, I'm not sure where to start? If its a matter of GPIO switching speed .. then yes
unread,
gpio
java
pi4j
Q&A
RCSwitch implementation works in Pi4j 0.0.5 and not in 1.0
How can I help, I'm not sure where to start? If its a matter of GPIO switching speed .. then yes
3/16/16
Stefan Stefan
1/26/16
Q&A
MCP23008 as Input Errors
Hi there, I have configured a MCP23008 expander as Digital Input and i have the following errors.
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MCP23008
gpio
i2c
pi
pi4j
raspberrypi
rpi
Q&A
MCP23008 as Input Errors
Hi there, I have configured a MCP23008 expander as Digital Input and i have the following errors.
1/26/16
Stefan Stefan
1/24/16
Q&A
I2C producer consumer pattern for MCP23008 and Arduino
Hi, Can someone help me implement producer consumer pattern for i2c ? Right now i am working on a
unread,
MCP23008
gpio
i2c
pi4j
raspberrypi
Q&A
I2C producer consumer pattern for MCP23008 and Arduino
Hi, Can someone help me implement producer consumer pattern for i2c ? Right now i am working on a
1/24/16
Robert Savage
, …
manfred....@gmail.com
6
7/27/16
Announcement
Pi4J Now Supports Non-Privileged Access (no more root/sudo)
This feature is now available in the latest v1.1 release of Pi4J. http://www.savagehomeautomation.com
unread,
gpio
i2c
pi4j
raspberrypi
root
serial
spi
sudo
Announcement
Pi4J Now Supports Non-Privileged Access (no more root/sudo)
This feature is now available in the latest v1.1 release of Pi4J. http://www.savagehomeautomation.com
7/27/16
Robert Savage
12/14/15
Announcement
Raspberry Pi with Java: Programming the Internet of Things (IoT)
Raspberry Pi with Java: Programming the Internet of Things (IoT) by Stephen Chin and James L. Weaver
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iot
java
javafx
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Announcement
Raspberry Pi with Java: Programming the Internet of Things (IoT)
Raspberry Pi with Java: Programming the Internet of Things (IoT) by Stephen Chin and James L. Weaver
12/14/15