mqtt | MQTT protocol support library for Mongoose OS

 by   mongoose-os-libs C Version: 2.2 License: Non-SPDX

kandi X-RAY | mqtt Summary

kandi X-RAY | mqtt Summary

mqtt is a C library typically used in Internet of Things (IoT) applications. mqtt has no bugs, it has no vulnerabilities and it has low support. However mqtt has a Non-SPDX License. You can download it from GitHub.

This library provides MQTT protocol client API that allows devices to talk to MQTT servers. Mongoose OS implements MQTT 3.1.1 client functionality, and works with all popular MQTT server implementations, like AWS IoT, Google IoT Core, Microsoft Azure, IBM Watson, HiveMQ, Mosquitto, etc. In order to talk to an MQTT server, configure MQTT server settings - see Configuration section below. Once configured, Mongoose OS keeps that connection alive by reconnecting and re-subscribing to all topics after disconnections - you do not need to implement the reconnection logic. If you want to use TLS, set mqtt.ssl_ca_cert=ca.pem. Make sure that ca.pem file has required CA certificates. If you want to use mutual TLS, set mqtt.ssl_cert=CLIENT_CERT.pem and mqtt.ssl_key=PRIVATE_KEY.pem.
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            kandi-support Support

              mqtt has a low active ecosystem.
              It has 16 star(s) with 23 fork(s). There are 11 watchers for this library.
              OutlinedDot
              It had no major release in the last 12 months.
              There are 5 open issues and 7 have been closed. On average issues are closed in 155 days. There are 4 open pull requests and 0 closed requests.
              It has a neutral sentiment in the developer community.
              The latest version of mqtt is 2.2

            kandi-Quality Quality

              mqtt has no bugs reported.

            kandi-Security Security

              mqtt has no vulnerabilities reported, and its dependent libraries have no vulnerabilities reported.

            kandi-License License

              mqtt has a Non-SPDX License.
              Non-SPDX licenses can be open source with a non SPDX compliant license, or non open source licenses, and you need to review them closely before use.

            kandi-Reuse Reuse

              mqtt releases are available to install and integrate.
              Installation instructions are not available. Examples and code snippets are available.

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            mqtt Key Features

            No Key Features are available at this moment for mqtt.

            mqtt Examples and Code Snippets

            No Code Snippets are available at this moment for mqtt.

            Community Discussions

            QUESTION

            Dynamically set bigquery table id in dataflow pipeline
            Asked 2021-Jun-15 at 14:30

            I have dataflow pipeline, it's in Python and this is what it is doing:

            1. Read Message from PubSub. Messages are zipped protocol buffer. One Message receive on a PubSub contain multiple type of messages. See the protocol parent's message specification below:

              ...

            ANSWER

            Answered 2021-Apr-16 at 18:49

            QUESTION

            Line number of error is missing in R shiny app error message
            Asked 2021-Jun-14 at 15:09

            I get this most common error message in shiny app. I am well aware of this error and have resolved it dozens of time. But this time I am stumped.

            ...

            ANSWER

            Answered 2021-Apr-23 at 03:30

            The problem seems to be in this line

            Source https://stackoverflow.com/questions/67219572

            QUESTION

            RPI ZERO + PAHO MQTT not sending signal with long delays
            Asked 2021-Jun-12 at 22:53

            I have a bme688 sensor (from Pimoroni) connected to a RPI ZERO. I have the PAHO MQTT library so I can send the data to the broker.

            If you see code below, in the very last line, I have a "time.sleep(5)". The code below works perfectly well. It takes the readings and sends them via the MQTT. The problem I have is that if I change the time from 5 seconds to 300 seconds (10 minutes), the MQTT does not seem to send the data. The RPI ZERO has the raspbian desktop installed so I ran it using Thonny to see if I get an error but everything works fine with the 300 second delay... but it does not send the data across to the broker.

            Any thoughts?

            ...

            ANSWER

            Answered 2021-Jun-12 at 22:53

            You are not starting the client network loop or manually calling it.

            https://www.eclipse.org/paho/index.php?page=clients/python/docs/index.php#network-loop

            You probably want to add client.loop_start() after client.connect()

            Source https://stackoverflow.com/questions/67953408

            QUESTION

            Sending Data in JSON schema using AT Commands
            Asked 2021-Jun-11 at 09:21

            I am working on MQTT connection establishment to the server. I need to send the data to the server in JSON schema format using AT Commands.
            The module used in N58 Neoway module. Using AT Commands connection got established and for publishing data or subscribing data to/from the server, it should happen in JSON format.
            The AT Command used is:

            ...

            ANSWER

            Answered 2021-Jun-08 at 11:42

            The problem in sending JSON through AT commands is that it contains double quotes ", that are unfortunately interpreted according to AT commands ETSI specification as the beginning of a string parameter. So, what happens in many modules is that it is impossible so send a JSON string as a parameter.

            Some modems vendors solve this issue by starting an online mode in which data can be sent rawly.
            N58 uses a different strategy instead, that consists in escaping the special characters. In the AT command guide it is called data link escape.

            Though the guide could be better (there's not explicit explanation of data link escape), we can infer it from the examples (see for example the one in AT+UDPSEND): in order to escape " character, just write \" as you would do in a C string. Example:

            Source https://stackoverflow.com/questions/67871751

            QUESTION

            Not able to connect with broker using MQTTNet library .net core
            Asked 2021-Jun-10 at 18:14

            I need an help, I can't connect with the broker. I'm using MQTTNet library into my api project .net core this is my code:

            ...

            ANSWER

            Answered 2021-Jun-10 at 13:39

            C# is not a language I've done much with, but I assume you are missing an await before mqttClient.ConnectAsync(options, CancellationToken.None); so the rest of the code waits for the connection to complete before trying to send the message

            Source https://stackoverflow.com/questions/67921437

            QUESTION

            Nuxtjs vuetify throwing lots of `Using / for division is deprecated and will be removed in Dart Sass 2.0.0.`
            Asked 2021-Jun-10 at 12:52

            Nuxtjs using vuetify throwing lots of error Using / for division is deprecated and will be removed in Dart Sass 2.0.0. during yarn dev

            Nuxtjs: v2.15.6 @nuxtjs/vuetify": "1.11.3", "sass": "1.32.8", "sass-loader": "10.2.0",

            Anyone know how to fix it ?

            ...

            ANSWER

            Answered 2021-Jun-01 at 05:16

            There's an issue with vuetify I think. But if you use yarn, you can use

            Source https://stackoverflow.com/questions/67631879

            QUESTION

            utf-8 Codification, strange characters, GUI doesn't work
            Asked 2021-Jun-10 at 08:58

            I am developing a MQTT app that takes some values through a board and bring it to a GUI. So I programmed also in C and in python (for the GUI). I have a problem with UTF-8 codification. In C I wrote it:

            ...

            ANSWER

            Answered 2021-Jun-10 at 08:58

            QUESTION

            How does one attach to just the primary node of a mongo instance?
            Asked 2021-Jun-08 at 12:20

            This might be me misunderstanding how Mongo works/new Go dev - but I'm not able to connect to my mongo instance from Go. When I connect to my Mongo instance using Studio 3T, I can connect just fine, browse the tables, etc. But If I try to connect using the Go module, it complains about not being able to find all the nodes. Is it necessary for it to be able to access all nodes? I thought the replica set itself was supposed to handle the replication?

            For example, I have this Go code:

            ...

            ANSWER

            Answered 2021-Jun-08 at 12:12

            Do I actually need to expose all the replica sets as well?

            Yes. Clients need to see all nodes in a replica set, so they can fail over when master goes down.

            Source https://stackoverflow.com/questions/67886337

            QUESTION

            Return Map with value but get empty value
            Asked 2021-Jun-08 at 11:33

            I'm trying to return a map with value but return me 0

            ...

            ANSWER

            Answered 2021-Jun-08 at 11:33

            This is happening because both your console.log(mapResultTemp); and return mapResultTemp; are executed before you are connected to MQTT and/or receive any messages from subscribed topics. You might want to use a promise or async/await function to resolve all topics and messages before returning a Map object.

            However, normally you would like to keep the connection and continue receiving messages. This way you could create a function that returns a value of your map when you call it.

            Source https://stackoverflow.com/questions/67885656

            QUESTION

            How to dynamically schedule a function to run at specified time
            Asked 2021-Jun-08 at 11:12

            I'm working on a Iot project. In my case, user can schedule a actuator command to run on specified time.( say on 08/06/2021 at 08.05 AM). This will be stored in mongodb database as a date variable. My requirement is to send an MQTT publish message to actuator at that specified time. Note that, this scheduling is not like interval scheduling. Each schedule will run exactly one time. I also need to edit the scheduled date time.

            There is one way to achieve this. Each time user schedule a command, I can run a setTimeout function. But this is not a good practice and editing the schedule is difficult. So please help me to find a optimal solution for this. Thanks in advance.

            ...

            ANSWER

            Answered 2021-Jun-08 at 11:12

            Community Discussions, Code Snippets contain sources that include Stack Exchange Network

            Vulnerabilities

            No vulnerabilities reported

            Install mqtt

            You can download it from GitHub.

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            For any new features, suggestions and bugs create an issue on GitHub. If you have any questions check and ask questions on community page Stack Overflow .
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