AWS Greengrass

- [Instructor] AWS Greengrass is an expansion of the pieces…that provide IoT solutions.…So far, as we've considered AWS and IoT,…all of the registered things communicate…to the IoT controller in the cloud.…More often than not, this requires a persistent connection.…A persistent connection doesn't require…a large volume of power to acquire,…but over time, a persistent connection can have an impact…on battery-powered things.…For example, I have to change the 4AA batteries…in my home door locks two times a year…to keep them connected to me remotely.…

In order to unburden the need for all things…to maintain a persistent connection,…Amazon has created Greengrass.…Greengrass places message publishing and subscribing…in the local environment,…which enables things to talk directly to other things…without needing to have the message brokered…through the cloud.…Greengrass does all the work for the local things…and only it needs to check in with the cloud…to make sure all current states are valid.…Let's take a look at Greengrass.…