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[英]Raspberry Pi Java Pi4j gpio isn't working for me, works with python though
[英]Raspberry 4 Java Pi4J GPIO Input not changing state
我正在尝试使用我的 Raspberry Pi 4 的 GPIO 打开我智能家居中的各种东西。
我在 GPIO 输入上获得 2.6V,从而产生高信号。 我已经用基本的 python 脚本确认了这一点,但由于我在 Java 中表现更好,并且我想使用一些 API,所以我想使用 Java,因此我想使用 Pi4J。
然而,无论我在做什么,输入永远不会改变它们的 state。或者更确切地说,输入的监听器永远不会被触发。 但是控制台一般会打印语句,控制台可以工作。
这是我的代码:
public class App {
private final static int inputOne = 27; // PIN 13, address 27
private final static Context pi4j = com.pi4j.Pi4J.newAutoContext();
public static void main(String[] args) throws InterruptedException, IOException {
final Console console = new Console();
console.promptForExit();
// I/O Config Build
var isInput = DigitalInput.newConfigBuilder(pi4j).id("0").name("inputOne").address(inputOne)
.pull(PullResistance.PULL_DOWN).debounce(3000L).provider("pigpio-digital-input").build();
// I/O Build
var inputOne = pi4j.din().create(isInput);
inputOne.addListener(e -> {
if (e.state() == DigitalState.HIGH) {
console.print("input high");
} else {
}
});
console.waitForExit();
pi4j.shutdown();
}
}
我也尝试过使用引脚的板地址而不是板布局,也没有结果。
我的 pom.xml,我正在使用 Pi4J v2:
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>Pi_SmartHomeLogic</groupId>
<artifactId>Pi_SmartHomeLogic</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>jar</packaging>
<build>
<sourceDirectory>src</sourceDirectory>
<plugins>
<plugin>
<artifactId>maven-compiler-plugin</artifactId>
<version>3.10.1</version>
<configuration>
<release>17</release>
</configuration>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-assembly-plugin</artifactId>
<version>3.4.2</version>
<configuration>
<archive>
<manifest>
<addClasspath>true</addClasspath>
<classpathPrefix>lib/</classpathPrefix>
<mainClass>app.App</mainClass>
</manifest>
</archive>
<descriptorRefs>
<descriptorRef>jar-with-dependencies</descriptorRef>
</descriptorRefs>
</configuration>
<executions>
<execution>
<id>assemble-all</id>
<phase>package</phase>
<goals>
<goal>single</goal>
</goals>
</execution>
</executions>
</plugin>
</plugins>
</build>
<!--<repository> -->
<!-- <id>caarmen-repo</id>-->
<!--<url>https://dl.bintray.com/caarmen/maven/</url> -->
<!--</repository> -->
<dependencies>
<dependency>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-jar-plugin</artifactId>
<version>3.2.2</version>
<type>maven-plugin</type>
</dependency>
<dependency>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-shade-plugin</artifactId>
<version>3.3.0</version>
<type>maven-plugin</type>
</dependency>
<dependency>
<groupId>ca.rmen</groupId>
<artifactId>lib-sunrise-sunset</artifactId>
<version>1.1.1</version>
<scope>compile</scope>
</dependency>
<dependency>
<groupId>io.github.zeroone3010</groupId>
<artifactId>yetanotherhueapi</artifactId>
<version>2.6.0</version>
</dependency>
<dependency>
<groupId>com.pi4j</groupId>
<artifactId>pi4j-core</artifactId>
<version>2.1.1</version>
</dependency>
<dependency>
<groupId>com.pi4j</groupId>
<artifactId>pi4j-gpio-extension</artifactId>
<version>1.3</version>
</dependency>
<dependency>
<groupId>com.pi4j</groupId>
<artifactId>pi4j-plugin-raspberrypi</artifactId>
<version>2.1.1</version>
</dependency>
<dependency>
<groupId>com.pi4j</groupId>
<artifactId>pi4j-plugin-pigpio</artifactId>
<version>2.1.1</version>
</dependency>
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-api</artifactId>
<version>1.7.36</version>
</dependency>
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-simple</artifactId>
<version>1.7.36</version>
</dependency>
</dependencies>
</project>
由于 Pi4J 不再使用 wiringPi,而是使用 BCM 地址,所以我不明白为什么它不起作用?
我有同样的问题。 对我来说,它有助于改变线路:
var inputOne = pi4j.din().create(isInput);
至(如示例中所示):
DigitalInputProvider provider = pi4j.provider("pigpio-digital-input");
var inputOne = provider.create(isInput);
并以root
用户身份运行 java 程序(参见The big sudo challenge: how can we fix the need to run PiGpio provider applications as sudo? )。 然后它会识别输入引脚的变化state。
以用户pi
身份运行程序时出现错误:
com.pi4j.library.pigpio.PiGpioException: PIGPIO ERROR: PI_INIT_FAILED; pigpio initialisation failed
at com.pi4j.library.pigpio.impl.PiGpioBase.validateResult(PiGpioBase.java:265) ~[pi4j-library-pigpio-2.2.1.jar:?]
at com.pi4j.library.pigpio.impl.PiGpioBase.validateResult(PiGpioBase.java:251) ~[pi4j-library-pigpio-2.2.1.jar:?]
at com.pi4j.library.pigpio.impl.PiGpioNativeImpl.gpioInitialise(PiGpioNativeImpl.java:95) ~[pi4j-library-pigpio-2.2.1.jar:?]
at com.pi4j.library.pigpio.PiGpio.initialize(PiGpio.java:159) ~[pi4j-library-pigpio-2.2.1.jar:?]
at com.pi4j.plugin.pigpio.provider.gpio.digital.PiGpioDigitalInputProviderImpl.create(PiGpioDigitalInputProviderImpl.java:60) ~[pi4j-plugin-pigpio-2.2.1.jar:?]
at com.pi4j.plugin.pigpio.provider.gpio.digital.PiGpioDigitalInputProviderImpl.create(PiGpioDigitalInputProviderImpl.java:41) ~[pi4j-plugin-pigpio-2.2.1.jar:?]
at jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:?]
at jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:77) ~[?:?]
at jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:?]
at java.lang.reflect.Method.invoke(Method.java:568) ~[?:?]
at com.pi4j.provider.impl.ProviderProxyHandler.invoke(ProviderProxyHandler.java:100) ~[pi4j-core-2.2.1.jar:?]
... 9 more
可以肯定的是,你能像这样扩展你的听众吗
inputOne.addListener(e -> {
console.print(e.state());
if (e.state() == DigitalState.HIGH) {
console.print("input high");
}
});
此示例描述了此类示例应用程序的所有步骤: https://pi4j.com/getting-started/minimal-example-application/
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