MQTT protocol in NodeMCU

Implementing H2Hcommunication over IoT network to solve COVID-19 Problems

Case study of IoT and COVID-19 (cont.)

Realtime example:

•In the remote area, more than 25% of the ratio affected Covid-19 will different 5stages.

•Hospital has only 20 beds.

•Now, IoT has implemented and monitor each and everyone from their home up to stage2 affected persons.

•In case someone has stage3 the message has been sent through the IoT and remedies has taken.

Protocol, Unique feature, Components

MQTT PROTOCOL:

•Message Queuing Telemetry Transport.

•Its mainly focus on M2M communication.

•Telemetry = Tele-Metering = Remote measurements.

•MQTT is one of the most commonly used protocols in IoT projects.

•Lightweight messaging protocol that transport messages between devices.

Why do we choose?

•This protocol mainly focuses on M2M communication.

•So, we change to H2H communication.

•It works in Remote area, only 3g is enough to transmit data.

•So, we can easily monitor a person who is affected by COVID-19

How does it work?

•MQTT server is called a broker and the clients are simply the connected devices.

•When a client wants to send data to the broker, we call this operation a publish.

•When a client wants to receive data from the broker, we call this operation a subscription.

COMMUNICATION ESTABLISHMENT

•Person1 (Topic) it wants to Publish on the broker. Then, it publishes the message as Data.

•The Person2 (Doctor) Subscribe to the topic “Data”. Then, it receives the message that the topic has published.

•The Broker role here is to take the message “Data” and deliver it to theperson2 (Doctor).

Thank you

wsherbin11@gmail.com