MATLAB Communication With ThingsBoard To Read Data
Hafiz Hamza
on 5 Dec 2023
Latest activity Reply by Hafiz Hamza
on 5 Dec 2023
Dear Team,
I have populated my data on ThingsBoard platform using ESP8266, now I want to read that data using MATLAB Industrial Communication Toolbox. I have written a code for this purpose below,
% Replace these values with your ThingsBoard MQTT broker details
brokerAddress = "ssl://demo.thingsboard.io"; % Adjust the broker address
port = 1883; % Use the appropriate port for secure MQTT
% Replace these values with your ThingsBoard device details
clientID = "";
userName = "";
password = ""; % Leave empty if not required
% Replace this with the path to the root certificate you downloaded
rootCert = "";
% Create an MQTT client
mqClient = mqttclient(brokerAddress, 'Port', port, 'ClientID', clientID, ...
'Username', userName, 'Password', password, 'CARootCertificate', rootCert);
% Check if the connection is established
mqClient.Connected
% Expected output: ans = int32(1)
% Subscribe to the telemetry topic
topicToSub = "v1/devices/me/telemetry";
subscribe(mqClient, topicToSub);
% Wait for a while to receive messages (adjust the time as needed)
pause(60);
% Peek at the MQTT client to view received messages
peek(mqClient);
% Close the MQTT client
clear mqClient;
%%%%__________________Output Result______________________%%%%%
>> MQTT_Receive
Warning: Using a port that allows unencrypted communication. For confidential matters, considering using an encryption
enforcing port, such as 8883.
Error using MQTT_Receive
Failed to establish a connection with broker "ssl://demo.thingsboard.io".
I desperately seeking your assistance in this regard
2 Comments
Time Descending
It looks like the device is expecting a secure connection. Can you change the port number to 8883 and try to connect again?
Eric Thank you very much for your responce. I am populatin the data on the ThingsBoard using 1883 port.
After exploring further I found that there is a mistake in the line below
brokerAddress = "ssl://demo.thingsboard.io"; % Adjust the broker address (for secure port)
brokerAddress = "tcp://demo.thingsboard.io"; % Adjust the broker address (for 1883).
After chnaging still the same result. not able to get the desired output...
Sign in to participate
