October 2019
Intermediate to advanced
350 pages
9h 5m
English
Content preview from Hands-On Internet of Things with MQTT
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Sending messages via MQTT
Our device is now ready to receive messages via MQTT. The MQTT server we are using features an MQTT, as well as an HTTP-interface. There are many different ways that we can now send messages to our device:
- Via Terminal/PowerShell as MQTT messages using an MQTT client such as Mosquitto
- Via Terminal/PowerShell as HTTP messages using curl
- Via a third-party iOS/Android app
- Via a third-party macOS/Windows/Linux app
- Via a third-party web-based client (for example, http://www.hivemq.com/demos/websocket-client/)
- Via a custom-made website using a JavaScript-MQTT client
- Via a custom Android/iOS/macOS/Linux/Windows app using MQTT-client
Basically everything is possible depending on how you send text to your device. MQTT is ...
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I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.