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[英]MQTT.js: How to close / connect to another broker after failed connection attempt? (for using bridged mosquitto)
[英]how to connect to an mqtt broker on ec2 via mqtt.js?
我想要: 通过节点程序包mqtt.js将来自raspberrypi的消息推送到/通过ec2 mosquitto代理,再返回到raspberrypi。
我在ec2实例上安装了一个mosquitto代理。 使用以下命令:
ssh -i awskeypair.pem ubuntu@ec2-54-153-18-31.us-west-1.compute.amazonaws.com
sudo apt-add-repository ppa:mosquitto-dev/mosquitto-ppa
sudo apt-get update
sudo apt-get install mosquitto
sudo apt-get install mosquitto-clients
mosquitto
在raspberrypi上,我通过node安装了mqtt.js。
已安装的软件包:
npm install mqtt --save
index.js
var mqtt = require('mqtt');
// pretty sure this var client line isn't connecting if I use test.mosquitto.org it works just fine
var client = mqtt.connect('mqtt://ec2-54-153-18-31.us-west-1.compute.amazonaws.com');
client.subscribe('presence');
client.publish('presence', 'Hello mqtt');
client.on('message', function (topic, message) {
// message is Buffer
console.log(message.toString());
});
client.end();
问题:我很确定我的带mosquitto代理的ec2实例不可访问
如何连接到我的ec2代理?
我的经纪人上的笔记
ubuntu@ip-172-31-6-23:~$ mosquitto
1425504937: mosquitto version 1.4 (build date 2015-02-18 21:33:29+0000) starting
1425504937: Using default config.
1425504937: Opening ipv4 listen socket on port 1883.
听起来您没有在安全组中打开端口1883。 如果安全组不是问题,请再次检查您的EC2实例上没有运行IPTables
不知道这是否也与ec2有关,但是对于IoT,我通过在connect调用中正确设置options对象来使MQTT.js工作。
var client = mqtt.connect('mqtts://<yourawsid>.iot.us-east-1.amazonaws.com', {
port: '8883',
cert: fs.readFileSync('<path>/cert.pem'),
key: fs.readFileSync('<path>/privateKey.pem')
}
);
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