There are client libraries for every language you could imagine, even a library you can embed in Arduino for making sensor networks. This saves both processing time and network bandwidth.Īs an open standard, MQTT has many open source implementations of both clients and servers. Clients subscribe to a narrow selection of topics and only receive the information they are looking for. This can make for extremely efficient applications.
It's like walking into a party and listening for interesting conversations to join. As a sender, you never really know who is listening you just provide your information to a set of topics and listen for any other topics you might care about. You send a message to a topic, and any software with a subscription for that topic gets a copy of your message. MQTT is a publish/subscribe (pubsub) wire protocol designed with small devices in mind. If all of these users were hitting this CSV server all the time, NYISO might need to restrict access to it. The target for my project ( ) was inclusion in the Home Assistant project, an open source home automation platform that has hundreds of thousands of users. We can create a low-overhead event stream that people can subscribe to and get updates as they happen.
Instead of sending everyone to their archive service to download the files all the time, we can do better. We should always be kind when building tools to collect and process open data to avoid overloading those systems. If you know the number of megawatts coming from different kinds of fuels, you can make a reasonable approximation of how much CO2 is being emitted at any given time. These are published as CSV files on a public archive and updated throughout the day. This includes reporting on what fuels are being consumed to generate power, at five-minute intervals, throughout the state.
eBook: An introduction to programming with BashĪlthough there is no official public API, as part of its mission, NYISO makes a lot of open data available for public consumption.Try for free: Red Hat Learning Subscription.
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