MQTT tutorial | send data to aws IoT core 

Thank you so much, if you would like to support, you can, please check the description. Currently engaged in sharing experience through article / blogs on medium shariqahmkhan.medium.com

Most welcome.

@@shariqahmkhan Hi, my code is running but its not giving any output on the frontend.

@@anishachoudhury_ hello Anisha, I am not sure what went wrong regarding integrating with front end but roughly make sure your variables are same in Jinja template etc etc. But it's unclear like this.

@@shariqahmkhan like i gave the port number, certificates, broker addres everything, I just want to send a msg but when im running the code its giving me no output.

@@anishachoudhury_ I am sorry, I could only assume what I wrote. I cannot see your code.

Thank you so much.

For example, Google Chrome downloads similar certificate on each client (a laptop hosting chrome browser is client here). So we can take reference that each IoT node would require such digital certificates for secure connection.

If GSM can send network packets (which I believe it can), then sure you can.

@@shariqahmkhan can you help ?

Policies define the way your device should interact with AWS, the capabilities or Authorization you want to give your device. If 100x devices are doing same job from same location (hypothetically speaking) then same policy is not a problem. Hope it's helpful

@@shariqahmkhan Thank you, for your response. So, for will be device be identified uniquely if same certificate are uploaded using the code?

Device identifier is client ID (randomly generated or you can config too), certificate is just to securely connect two endpoints. There is even deeper topic to discuss to how you should distribute certificates for various devices.

Agree ❤️😁

I used Standard Python IDLE in Windows 7

Pls check broker = "this is amazon broker" in Python code. Mosquito act as local broker for local network devices.

@@shariqahmkhan Thank you sir!!

Free public broker www.emqx.com/en/mqtt/public-mqtt5-broker Python Client www.emqx.com/en/mqtt-client-sdk?language=Python (Still Paho mqtt) broker: broker.emqx.io insecure port: 1883 Secure port: 8883 I hope it was helpful

I don't know how and what you wrote but you can cross verify potential fix as below: 1. Check if your internet is connect (both ends) 2. Check if both Pub and Sub are connected to same broker and port (better try online broker) 3. If using local broker, cross check by typing "services.msc" in cmd and scrolling down to check if local broker for MQTT (for ex mosquitto) is running state. write me a mail if it does not solve

@@shariqahmkhan I get exactly the same error, coud you please help me to solve it?

@@marcomura4612 Pls perform action as I mentioned above, and if those dont work please send your code at shariqahmkhan@gmail.com.

It shouldn't but since I don't know what code you wrote.

Ciao Dave, You are right, in the new UI it does not display ClientID, for that reason I have created another tutorial (without voice), please expand description of this video, that just shows how to switch to old UI (for now) and still continue. I don't think you need loop_start, but it's an additional method to give you fine control (although I haven't used it). Hope I answered your question. :)

You need to subscribe the topic on AWS console. Basically AWS is not a device but a service provider for broker for MQTT

Watch the video over again and help me gain more views ;)

Yes of course. You can create a local broker and use IP

@@shariqahmkhan is same work for 1883 port

@@shariqahmkhan can we get ip of endpoint so I use ip instead

@@kirangurav5172 yes 1883 is insecure port. Meaning if you generate certificate and use it then you have to use 8883 otherwise 1883.

@@kirangurav5172 yes ofcourse. You can try mosquito broker on Azure Cloud and then configure it's one of port to allow connection and test it using IP.

You need to provide correct path to certificate, your python file seems in different directory than certificate

@@shariqahmkhan Connecting to 'endpoint' with client ID 'client-id' Traceback (most recent call last): File "c:\Users\DELL\Desktop\Certificates\aws3.py", line 34, in connect_future.result() File "C:\Users\DELL\AppData\Local\Programs\Python\Python311\Lib\concurrent\futures\_base.py", line 456, in result return self.__get_result() ^^^^^^^^^^^^^^^^^^^ File "C:\Users\DELL\AppData\Local\Programs\Python\Python311\Lib\concurrent\futures\_base.py", line 401, in __get_result raise self._exception awscrt.exceptions.AwsCrtError: AWS_ERROR_MQTT_UNEXPECTED_HANGUP: The connection was closed unexpectedly. I getting some error could you please check this error @shariqahmkhan

soon

Email your requirement at shariqahmkhan@gmail.com

Also，I found when i click the "test", there is no green prompt of connected to Device gateway on client id successfully.

could be multiple reason 1. Most common (I encountered sometimes) internet issue 2. Different QOS 3. Client ID (for aws you definitely need it) 4. Also, most of time it was certificate folder or their right extension in MQTT program Try to copy as in video and check if things work

@@zhaoxiaoyu9245 It is mostly during initial configuration. Check policy tab

Hi, Sorry for late response. You can send file in any format. DER is just another certificate format

Switch to 9:20 and see it's in green highlight. Otherwise when you have configured to receive MQTT msgs, on the right side "i" button you can see more details.

the issue is I have already configured to receive the MQTT messages and the success notification is no more shown...... clicking the i button while in the test client is only directing me to some blogs about MQTT in general

@@manudeeppendurthi8773 email your query with screenshot of code and output at shariqahmkhan@gmail.com

@@manudeeppendurthi8773 switch to 12:47

ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-y1WFZ--goZQ.html checkout this temporary fix but genuine

How much Data ? 1. In terms of sending them all together ? MQTT has limitation around 256 MB but new protocol version has even higher. Checkout HiveMQ, Oasis.org or similar pages Also consider bandwidth of your network + payload that you add when you apply security layer (X.509 digital certificate etc) 2. In terms of storage ? It depends on the end device capacity, how much can it store.

Switch to 12:47 around it

Yes, when i created thing i could not get this client id in toast message

ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-y1WFZ--goZQ.html checkout this temporary fix but genuine

Please help me out complete this task ..

Watch this video ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-y1WFZ--goZQ.html

Seems network issue