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Follow are the popular IoT protocols these days 1. MQTT 2.  CoAP Introduction for MQTT and example Nowadays we hear a lot about MQTT with IoT based projects. Let's see actually what is MQTT with simple examples in your Pc and later you can use them for your future IoT projects. MQTT is a publish/subscribe protocol that allows edge-of-network devices to publish to a broker. Clients connect to this broker, which then mediates communication between the two devices. Each device can subscribe, or register, to particular topics. When another client publishes a message on a subscribed topic, the broker forwards the message to any client that has subscribed. Hey let's make the idea so simple As an example imagine you have a plant. You put 3 sensors to it temperature sensor, humidity sensor, light intensity sensor So you need to get these sensor data to your application. Let's use the MQTT protocol to this scenario. He

   This is the promotional video which we have done to the Embedded systems project. Presentation slide   https://docs.google.com/presentation/d/1Ep9eNl-nSVVVAHae62GMqLgg84za-thUbyO-UmZ19PA/edit?usp=sharing  This project we are monitoring and controlling a Greenhouse. By analyzing monitored data and digital image System will control the Greenhouse. Here we have developed a working prototype with one plant. Here our main goals wer e Light and watering control, Temperature and humidity Controlling, Image processing to monitor leaves of the and infections, Automatic management and remote monitoring. The client can have the latest status of the greenhouse. Here we have used the MQTT protocol because it is a lightweight messaging protocol. Here each sensor has a topic. As an example humidity sensor has topic greenhouse/1/hum other sensors also have. So here Arduino UNO + WIFI shield is acting as an MQTT client and publish this sensor data to the related topics. Then

here you can see how hardware has been connected and how Networking part is happpening  Here our main goals wer e Light and watering control,Temperature and humidity Controlling , Image processing to monitor leaves of the and infections , Automatic management and and remote monitoring. Client can have latest status of the greenhouse . Here we have used MQTT protocol because it is lightweight messaging protocol . Here each sensor has topic. As an example humidity sensor has topic greenhouse/1/hum other sensors also have. So here Arduino UNO + WIFI shield is acting as a MQTT client and publish this sensor data to the related topics . Then in Raspberry PI there is MQTT server and from the PI data will be put into a Graphical user interface .So any user with proper authentication can connect to the IP of the raspberry and get these data. So i think you have some idea about the hardware part. Next  we are planning to do the Controlling part and Image processing part to the Gre