mqtt

MQTT-SN with Windows

£可爱£侵袭症+ 提交于 2019-12-01 00:53:44
I have been running MQTT (Mosquito) for a while on Windows and it works great with my Netduino, thanks ppatierno. But now I need to start incorporating mqtt-sn for a wired serial connection from an Arduino. Having a solution capable of wireless is also desirable. I can not find any references for accomplishing this on Windows. Does it need to be some combination of cygwin socat (would prefer to avoid) and Mosquito or what? Really Small Message Broker (RSMB) has support for MQTT-SN over UDP. Source is available from git on http://git.eclipse.org/c/mosquitto/org.eclipse.mosquitto.rsmb.git . To

Suitable protocol for Instant Messaging

天大地大妈咪最大 提交于 2019-11-30 22:50:23
We have to develop a native mobile app for Instant Messaging using a SUITABLE protocol. Also we are to develop a website for that application so that those who cannot login to mobile can continue their Instant Messaging through the website. Later on, we would be adding the facilities of voice and video calls to the both native mobile app as well as the website. Now my question is that, based on the above situation, which protocol we should go with? I did some research on the internet about that and am unable to choose amongst XMPP, MQTT and MUMBLE. Which one would be the best among them for

RabbitMQ单机集群搭建

不打扰是莪最后的温柔 提交于 2019-11-30 22:43:55
搭建前容我先吐槽下,因为第一次接触rabbitmq,从安装到启动到查看rabbitmq-web页面,这些都比较简单,但是关于单机部署多个实例,我按照资料设置,总会遇到各种问题,书本,博文,百度了很多,几乎千片一律,不过最后还是在谷歌上搜到了蛛丝马迹, 由于我们使用的版本太新了,所以有些资料自然就过期了! 下面开始正式搭建: 系统:mac rabbitmq:3.6.9,当前时间最新版。 1.安装步骤略。 (建议使用命令brew install rabbitmq, 安装卸载都比较方便) 2.正式启动时,先了解几个概念 a. 先启动默认rabbit 到rabbitmq安装目录的sbin目录下 $ . /rabbitmq -server -detached (后台式启动,缺点部分错误显示不出来,我就被坑了,可以使用不加【 -detached 】方式启动,缺点多开几个终端窗口。) b. 查看状态 zhanghuilongdeMacBook-Pro:sbin zhanghuilong$ ./rabbitmqctl status Status of node rabbit@localhost ... [{pid, 21180 }, {running_applications, [{rabbitmq_management_visualiser, "RabbitMQ Visualiser" , "3

Mqtt协议 服务器交互

喜欢而已 提交于 2019-11-30 22:35:36
1.服务器发送消息 package demo1; import org.eclipse.paho.client.mqttv3.MqttClient; import org.eclipse.paho.client.mqttv3.MqttConnectOptions; import org.eclipse.paho.client.mqttv3.MqttDeliveryToken; import org.eclipse.paho.client.mqttv3.MqttException; import org.eclipse.paho.client.mqttv3.MqttMessage; import org.eclipse.paho.client.mqttv3.MqttPersistenceException; import org.eclipse.paho.client.mqttv3.MqttTopic; import org.eclipse.paho.client.mqttv3.persist.MemoryPersistence; /** * Title:Server 这是发送消息的服务端 * Description: 服务器向多个客户端推送主题,即不同客户端可向服务器订阅相同主题 * @author rao */ /** * @author xiaoxia * @ClassName

MQTT-SN with Windows

荒凉一梦 提交于 2019-11-30 20:50:30
问题 I have been running MQTT (Mosquito) for a while on Windows and it works great with my Netduino, thanks ppatierno. But now I need to start incorporating mqtt-sn for a wired serial connection from an Arduino. Having a solution capable of wireless is also desirable. I can not find any references for accomplishing this on Windows. Does it need to be some combination of cygwin socat (would prefer to avoid) and Mosquito or what? 回答1: Really Small Message Broker (RSMB) has support for MQTT-SN over

How can I publish a file using Mosquitto in python?

痴心易碎 提交于 2019-11-30 17:56:57
问题 I am using python-mosquitto to subscribe to my MQTT broker which support file type uploads. I can use it just fine using the -f flag when going from Mosquitto on the command line. However, I can't figure out how to use the client.publish(topic, payload) to specify a file to publish when doing it from within my python script. Python mosquitto gives me the error TypeError: payload must be a string, bytearray, int, float or None. when I try to throw something weird at it. I have a file stored in

Android实现推送方式解决方案

£可爱£侵袭症+ 提交于 2019-11-30 16:57:37
本文介绍在Android中实现推送方式的基础知识及相关解决方案。推送功能在手机开发中应用的场景是越来起来了,不说别的,就我们手机上的新闻客户端就时不j时的推送过来新的消息,很方便的阅读最新的新闻信息。这种推送功能是好的一面,但是也会经常看到很多推送过来的垃圾信息,这就让我们感到厌烦了,关于这个我们就不能多说什么了,毕竟很多商家要做广告。本文就是来探讨下Android中实现推送功能的一些解决方案,也希望能够起到抛砖引玉的作用。^_^   1.推送方式基础知识:   在移动互联网时代以前的手机,如果有事情发生需要通知用户,则会有一个窗口弹出,将告诉用户正在发生什么事情。可能是未接电话的提示,日历的提醒,或是一封新的彩信。推送功能最早是被用于Email中,用来提示我们新的信息。由于时代的发展和移动互联网的热潮,推送功能更加地普及,已经不再仅仅用在推送邮件了,更多地用在我们的APP中了。   当我们开发需要和服务器交互的应用程序时,基本上都需要获取服务器端的数据,比如《地震应急通》就需要及时获取服务器上最新的地震信息。要获取服务器上不定时更新的信息,一般来说有两种方法:第一种是客户端使用Pull(拉)的方式,就是隔一段时间就去服务器上获取一下信息,看是否有更新的信息出现。第二种就是 服务器使用Push(推送)的方式,当服务器端有新信息了,则把最新的信息Push到客户端上。这样

Paho MQTT Android service wake up activity

依然范特西╮ 提交于 2019-11-30 15:15:24
问题 I am trying to use Paho Android MQTT library (downloaded from here). The sample service application works fine, the subscribe and the publish methods work fine too when the sample application is running. When I close it, the device doesn't receive message notifications anymore. Does anyone has an experience how to modify/implement the service correctly to receive message even if the application isn't running? 回答1: You should implement a background service see: http://developer.android.com

makefile 模板二

爱⌒轻易说出口 提交于 2019-11-30 15:05:00
这个模板跟上一个比起来区别就是要一个.c一个地添加,.c文件太多的时候,就比较费劲 工程链接: https://github.com/jorinzou/MqttServer-and-MqttClient.git CC=gcc OBJ=MqttServer all:$(OBJ) HERE=./ incs=-I$(HERE) files:=$(HERE)/main.c files+=$(HERE)/SocketServer.c files+=$(HERE)/cJSON.c files+=$(HERE)/mqtt.c OBJS_C := $(patsubst %.c,%.o,$(files)) CFLAGS=-O0 -g CFLAGS+=$(incs) LDFLAGS=-lpthread LDFLAGS+=-lm LDFLAGS+=-ldl $(OBJ):$(OBJS_C) $(CC) $(LDFLAGS) -o $@ $^ $(OBJS_C):%.o:%.c $(CC) $(CFLAGS) -c $< -o $@ clean: rm -rf $(HERE)*.o rm -rf $(HERE)/$(OBJ) 来源: https://my.oschina.net/u/4149215/blog/3112083

基于Netty的IdleStateHandler实现Mqtt心跳

末鹿安然 提交于 2019-11-30 15:04:56
基于Netty的IdleStateHandler实现Mqtt心跳 IdleStateHandler 解析 最近研究 jetlinks 编写的基于 Netty 的 mqtt-client ( https://github.com/jetlinks/netty-mqtt-client ),总结若干知识点. Netty 中,实现心跳机制较为简单,主要依赖于 IdleStateHandler 判断 channel 的读写超时. /** * Creates a new instance firing {@link IdleStateEvent}s. * * @param readerIdleTimeSeconds * an {@link IdleStateEvent} whose state is {@link IdleState#READER_IDLE} * will be triggered when no read was performed for the specified * period of time. Specify {@code 0} to disable. * @param writerIdleTimeSeconds * an {@link IdleStateEvent} whose state is {@link IdleState#WRITER_IDLE} *