Как настроить клиента Paho MQTT на Raspberry Pi

Question

Я хочу настроить клиента MQTT на мой малиновый пи. Моя цель - сначала использовать мой Pi для отправки сообщения «hello world» брокеру Mosquitto, который я установил на своем Mac, а во-вторых, подключить свой Pi к некоторым датчикам и отправить данные, которые я собираю для одного и того же брокера. В настоящее время я рассматриваю Javascript клиента Paho: https://github.com/eclipse/paho.mqtt.javascript.

Теперь я застреваю, пытаясь использовать maven для создания и запуска тестов, включенных в репозиторий Paho. Когда я побежал mvn -e он произвел эти сообщения:

[INFO] Error stacktraces are turned on. 
[INFO] Scanning for projects... 
[WARNING] 
[WARNING] Some problems were encountered while building the effective model for org.eclipse.paho:paho.javascript:pom:1.0.2 
[WARNING] 'version' contains an expression but should be a constant. @ org.eclipse.paho:paho.javascript:${paho.version}, /home/pi/projects/paho.mqtt.javascript/pom.xml, line 7, column 11 
[WARNING] 'build.plugins.plugin.(groupId:artifactId)' must be unique but found duplicate declaration of plugin org.codehaus.mojo:templating-maven-plugin @ org.eclipse.paho:paho.javascript:${paho.version}, /home/pi/projects/paho.mqtt.javascript/pom.xml, line 114, column 12 
[WARNING] 
[WARNING] It is highly recommended to fix these problems because they threaten the stability of your build. 
[WARNING] 
[WARNING] For this reason, future Maven versions might no longer support building such malformed projects. 
[WARNING] 
[INFO]                   
[INFO] ------------------------------------------------------------------------ 
[INFO] Building paho.javascript 1.0.2 
[INFO] ------------------------------------------------------------------------ 
[INFO] 
[INFO] --- minify-maven-plugin:1.7.4:minify (default-minify) @ paho.javascript --- 
[WARNING] The source file [mqttws31.js] has the same name as the final file. 
[INFO] Starting CSS task: 
[INFO] Starting JavaScript task: 
[INFO] Processing source file [mqttws31.js]. 
[INFO] Creating the merged file [mqttws31.js]. 
[INFO] Creating the minified file [mqttws31.min.js]. 
Aug 15, 2016 5:25:42 AM com.google.javascript.jscomp.LoggerErrorManager println 
WARNING: mqttws31.js:200: WARNING - Parse error. invalid param name "ERROR.KEY" 
    * @param {error} ERROR.KEY value above. 
        ^

Aug 15, 2016 5:25:42 AM com.google.javascript.jscomp.LoggerErrorManager println 
WARNING: mqttws31.js:737: WARNING - Parse error. Non-JSDoc comment has annotations. Did you mean to start it with '/**'? 
    /* 
    ^

Aug 15, 2016 5:25:42 AM com.google.javascript.jscomp.LoggerErrorManager println 
WARNING: mqttws31.js:1667: WARNING - Parse error. invalid param name "connectOptions.timeout" 
     * @param {number} connectOptions.timeout - If the connect has not succeeded within this 
         ^

Aug 15, 2016 5:25:42 AM com.google.javascript.jscomp.LoggerErrorManager println 
WARNING: mqttws31.js:1670: WARNING - Parse error. invalid param name "connectOptions.userName" 
     * @param {string} connectOptions.userName - Authentication username for this connection. 
         ^

Aug 15, 2016 5:25:42 AM com.google.javascript.jscomp.LoggerErrorManager println 
WARNING: mqttws31.js:1671: WARNING - Parse error. invalid param name "connectOptions.password" 
     * @param {string} connectOptions.password - Authentication password for this connection. 
         ^

Aug 15, 2016 5:25:42 AM com.google.javascript.jscomp.LoggerErrorManager println 
WARNING: mqttws31.js:1672: WARNING - Parse error. invalid param name "connectOptions.willMessage" 
     * @param {Paho.MQTT.Message} connectOptions.willMessage - sent by the server when the client 
            ^

Aug 15, 2016 5:25:42 AM com.google.javascript.jscomp.LoggerErrorManager println 
WARNING: mqttws31.js:1674: WARNING - Parse error. invalid param name "connectOptions.keepAliveInterval" 
     * @param {Number} connectOptions.keepAliveInterval - the server disconnects this client if 
         ^

Aug 15, 2016 5:25:42 AM com.google.javascript.jscomp.LoggerErrorManager println 
WARNING: mqttws31.js:1677: WARNING - Parse error. invalid param name "connectOptions.cleanSession" 
     * @param {boolean} connectOptions.cleanSession - if true(default) the client and server 
          ^

Aug 15, 2016 5:25:42 AM com.google.javascript.jscomp.LoggerErrorManager println 
WARNING: mqttws31.js:1679: WARNING - Parse error. invalid param name "connectOptions.useSSL" 
     * @param {boolean} connectOptions.useSSL - if present and true, use an SSL Websocket connection. 
          ^

Aug 15, 2016 5:25:42 AM com.google.javascript.jscomp.LoggerErrorManager println 
WARNING: mqttws31.js:1680: WARNING - Parse error. invalid param name "connectOptions.invocationContext" 
     * @param {object} connectOptions.invocationContext - passed to the onSuccess callback or onFailure callback. 
         ^

Aug 15, 2016 5:25:42 AM com.google.javascript.jscomp.LoggerErrorManager println 
WARNING: mqttws31.js:1811: WARNING - Parse error. invalid param name "subscribeOptions.qos" 
     * @param {number} subscribeOptions.qos - the maiximum qos of any publications sent 
         ^

Aug 15, 2016 5:25:42 AM com.google.javascript.jscomp.LoggerErrorManager println 
WARNING: mqttws31.js:1813: WARNING - Parse error. invalid param name "subscribeOptions.invocationContext" 
     * @param {object} subscribeOptions.invocationContext - passed to the onSuccess callback 
         ^

Aug 15, 2016 5:25:42 AM com.google.javascript.jscomp.LoggerErrorManager println 
WARNING: mqttws31.js:1828: WARNING - Parse error. invalid param name "subscribeOptions.timeout" 
     * @param {number} subscribeOptions.timeout - which, if present, determines the number of 
         ^

Aug 15, 2016 5:25:42 AM com.google.javascript.jscomp.LoggerErrorManager println 
WARNING: mqttws31.js:1859: WARNING - Parse error. invalid param name "unsubscribeOptions.invocationContext" 
     * @param {object} unsubscribeOptions.invocationContext - passed to the onSuccess callback 
         ^

Aug 15, 2016 5:25:42 AM com.google.javascript.jscomp.LoggerErrorManager println 
WARNING: mqttws31.js:1874: WARNING - Parse error. invalid param name "unsubscribeOptions.timeout" 
     * @param {number} unsubscribeOptions.timeout - which, if present, determines the number of seconds 
         ^

Aug 15, 2016 5:25:42 AM com.google.javascript.jscomp.LoggerErrorManager printSummary 
WARNING: 0 error(s), 15 warning(s) 
[INFO] Uncompressed size: 80699 bytes. 
[INFO] Compressed size: 29283 bytes minified (7714 bytes gzipped). 
[INFO] 
[INFO] 
[INFO] --- maven-antrun-plugin:1.3:run (generate-js-output) @ paho.javascript --- 
[INFO] Executing tasks 
    [copy] Copying 1 file to /home/pi/projects/paho.mqtt.javascript/target 
    [delete] Deleting: /home/pi/projects/paho.mqtt.javascript/target/mqttws31-min-2.js 
    [delete] Deleting: /home/pi/projects/paho.mqtt.javascript/target/mqttws31.min.js 
[INFO] Executed tasks 
[INFO] 
[INFO] --- exec-maven-plugin:1.2.1:exec (install-jsdoc-modules) @ paho.javascript --- 
[INFO] ------------------------------------------------------------------------ 
[INFO] BUILD FAILURE 
[INFO] ------------------------------------------------------------------------ 
[INFO] Total time: 7.702 s 
[INFO] Finished at: 2016-08-15T05:25:44+00:00 
[INFO] Final Memory: 6M/16M 
[INFO] ------------------------------------------------------------------------ 
[ERROR] Failed to execute goal org.codehaus.mojo:exec-maven-plugin:1.2.1:exec (install-jsdoc-modules) on project paho.javascript: Command execution failed. Cannot run program "npm" (in directory "/home/pi/projects/paho.mqtt.javascript"): error=2, No such file or directory -> [Help 1] 
org.apache.maven.lifecycle.LifecycleExecutionException: Failed to execute goal org.codehaus.mojo:exec-maven-plugin:1.2.1:exec (install-jsdoc-modules) on project paho.javascript: Command execution failed. 
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:212) 
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:153) 
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:145) 
    at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:116) 
    at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:80) 
    at org.apache.maven.lifecycle.internal.builder.singlethreaded.SingleThreadedBuilder.build(SingleThreadedBuilder.java:51) 
    at org.apache.maven.lifecycle.internal.LifecycleStarter.execute(LifecycleStarter.java:128) 
    at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:307) 
    at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:193) 
    at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:106) 
    at org.apache.maven.cli.MavenCli.execute(MavenCli.java:863) 
    at org.apache.maven.cli.MavenCli.doMain(MavenCli.java:288) 
    at org.apache.maven.cli.MavenCli.main(MavenCli.java:199) 
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) 
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) 
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) 
    at java.lang.reflect.Method.invoke(Method.java:497) 
    at org.codehaus.plexus.classworlds.launcher.Launcher.launchEnhanced(Launcher.java:289) 
    at org.codehaus.plexus.classworlds.launcher.Launcher.launch(Launcher.java:229) 
    at org.codehaus.plexus.classworlds.launcher.Launcher.mainWithExitCode(Launcher.java:415) 
    at org.codehaus.plexus.classworlds.launcher.Launcher.main(Launcher.java:356) 
Caused by: org.apache.maven.plugin.MojoExecutionException: Command execution failed. 
    at org.codehaus.mojo.exec.ExecMojo.execute(ExecMojo.java:367) 
    at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo(DefaultBuildPluginManager.java:134) 
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:207) 
    ... 20 more 
Caused by: java.io.IOException: Cannot run program "npm" (in directory "/home/pi/projects/paho.mqtt.javascript"): error=2, No such file or directory 
    at java.lang.ProcessBuilder.start(ProcessBuilder.java:1048) 
    at java.lang.Runtime.exec(Runtime.java:620) 
    at org.apache.commons.exec.launcher.Java13CommandLauncher.exec(Java13CommandLauncher.java:58) 
    at org.apache.commons.exec.DefaultExecutor.launch(DefaultExecutor.java:254) 
    at org.apache.commons.exec.DefaultExecutor.executeInternal(DefaultExecutor.java:319) 
    at org.apache.commons.exec.DefaultExecutor.execute(DefaultExecutor.java:160) 
    at org.codehaus.mojo.exec.ExecMojo.executeCommandLine(ExecMojo.java:610) 
    at org.codehaus.mojo.exec.ExecMojo.execute(ExecMojo.java:352) 
    ... 22 more 
Caused by: java.io.IOException: error=2, No such file or directory 
    at java.lang.UNIXProcess.forkAndExec(Native Method) 
    at java.lang.UNIXProcess.<init>(UNIXProcess.java:248) 
    at java.lang.ProcessImpl.start(ProcessImpl.java:134) 
    at java.lang.ProcessBuilder.start(ProcessBuilder.java:1029) 
    ... 29 more 
[ERROR] 
[ERROR] Re-run Maven using the -X switch to enable full debug logging. 
[ERROR] 
[ERROR] For more information about the errors and possible solutions, please read the following articles: 
[ERROR] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/MojoExecutionException 

Мои вопросы как исправить эти ошибки и как я могу использовать Maven для сборки и запуска тестов?

Кроме того, Paho требует, чтобы я установил maven и JDK. Есть ли другие более легкие и простые клиенты MQTT, подходящие для малины Pi?

Answer 1

Похоже, вы не НПМ установлены

Caused by: java.io.IOException: Cannot run program "npm" (in directory "/home/pi/projects/paho.mqtt.javascript"): error=2, No such file or directory

Установка Node.js и НПМ

МВН и JDK просто необходимы для построения кода с СРК. Есть бинарные пакеты доступны, которые не требуют сборок повторного preqs доступного из here

и почти полного списка доступных клиентов можно найти на сайте mqtt.org here

Answer 2

Относительно легче/проще в использовании MQTT клиентам вы можете уйти с помощью клиентов командной строки mosquitto_pub и mosquitto_pub и спроектировать свою логику вокруг них. Если это жизнеспособный подход, конечно, полностью зависит от вашего варианта использования. В любом случае эти инструменты отлично подходят для специальных целей тестирования.