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安裝中文字典英文字典辭典工具!
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- IoT: do I need to use MQTT or HTTP? - Stack Overflow
As MQTT is designed for delivering data (not entire pages) its pub sub model offers many useful built-in features such as retention and last will Also MQTT offers a simple way of implementing encryption, authentication, and access control MQTT is intended for situations where your connection may be intermittent or otherwise unreliable
- mqtt - How to test the `Mosquitto` server? - Stack Overflow
the mqtt default port is 1883 but if are running on a different port just like http you can specify port e g ( curl mqtt: localhost:1883 ) the proper test would be to subscribe and publish to a topic which can also be done somewhat with curl e g
- Newest mqtt Questions - Stack Overflow
Using python paho-mqtt, I'm trying to receive exactly 1 message from a topic and then exit If no messages
- mosquitto-client obtain refused connection - Stack Overflow
I experienced the same issue, for me it was in upgrading mosquitto for mqtt v5 support: $ mosquitto --version mosquitto version 2 0 14 mosquitto is an MQTT v5 0 v3 1 1 v3 1 broker However, the upgraded broker no longer supported anonymous connections: $ mosquitto_pub -t mytopic -m "Hello World" Connection error: Connection Refused: not authorised
- How to use MQTT over the internet? - Stack Overflow
add line listener 1883 0 0 0 0 under #listener port-number [ip address host name] This will allow requests from any source on 1883 port to be handled by your MQTT Restart MQTT ; I could successfully open up my MQTT server to public internet traffic by following above steps after many trial and errors with many different configuration changes
- How can I get the mqtt broker url starting with mqtts: ?
Your broker is currently configured with a bare MQTT (mqtt:\\) listener on port 1883 So your connection URL for loriot should be: mqtt: 54 180 126 214:1883 If loriot requires a MQTT over TLS (mqtts: ) connection then you will need to first get a TLS certificate, then configure the broker to use it You should probably get a hostname for the
- Can a web browser use MQTT? - Stack Overflow
We've had good experience using WSS, the WebSocket to TCP Gateway (for MQTT) It means running a separate process, but that does avoid having to change Apache's configuration It means running a separate process, but that does avoid having to change Apache's configuration
- What are advantages of MQTT over TCP IP? Since MQTT is based on TCP . . .
The benefits of using MQTT over TCP IP far outweighs the data overhead it introduces Also, MQTT was devised to solve a specific problem of getting sensor data from a remote system which could not be connected to the consumer of the sensor data all the time
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