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IoT gateway

Contributor(s): Trea Lavery

An Internet of Things (IoT) gateway is a physical device or software program that serves as the connection point between the cloud and controllers, sensors and intelligent devices. All data moving to the cloud, or vice versa, goes through the gateway, which can be either a dedicated hardware appliance or software program. An IoT gateway may also be referred to as an intelligent gateway or a control tier.

Some sensors generate tens of thousands of data points per second. A gateway provides a place to preprocess that data locally at the edge before sending it on to the cloud. When data is aggregated, summarized and tactically analyzed at the edge, it minimizes the volume of data that needs to be forwarded on to the cloud, which can have a big impact on response times and network transmission costs.

Another benefit of an IoT gateway is that it can provide additional security for the IoT network and the data it transports. Because the gateway manages information moving in both directions, it can protect data moving to the cloud from leaks and IoT devices from being compromised by malicious outside attacks with features such as tamper detection, encryption, hardware random number generators and crypto engines.

This was last updated in November 2017

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What do you think is the most important or useful benefit of an IoT gateway?
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The most important benefit of an IoT gateway is that it pre-process the data and filter the data from devices/sensors and thus reducing the amount of data to be sent to the cloud.
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In that case, should the definition gateway change to processor? If pre-processing is implemented in the device, it will finally become a PC unless the processing power is limited. Where do you draw the line?

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Yes, we could call Gateway as a PC or smart device which is having built-in computing power.
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Protocol conversion 

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scalability of iot enterprise system
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the IoT Gateway also can be used as protocol converter and transport data via MQTT.
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