WioAirMonitor is a smart device, able to monitor air quality and send collected data to cloud services via the MQTT protocol. Part list SeeedStudio WioTerminal SeeedStudio Grove Laser Dust Sensor SeeedStudio Grove GPS Module Description WioAirMonitor, as the name suggests, it is built around the WioTerminal device from SeeedStudio. This device – compatible…
Security is a very important aspect for MQTT brokers. In a previous article you’ve already learned how to implement authentication and authorization. The weakness in that configuration was that credentials were transmitted in cleartext; it was therefore possible, for an attacker who can sniff the network traffic, to read and use them to impersonate a legitimate client. Today I’ll show…
Adafruit IO is the new cloud platform (at the moment still in beta) by Adafruit, designed to allow simple data connections using standard APIs and web-based dashboards. This new platform exposes MQTT APIs, you can therefore apply what you learned in my previous posts to create a complete project that takes advantage of all its features. The…
In the IoT they often don’t give much importance to the security aspects of the communcation. Proof of this is that many of the latest DDOS (Distributed Denial of Service) attacks have been launched by hacked Internet-connected smart devices. In the previous posts, you learned how to configure mosquitto to receive messages published by clients and…
In the first part of this tutorial, I introduced the concept of topics. Every message sent to an MQTT broker must be published to a topic and clients connected to the broker decide which messages to receive subscribing to one or more topics. Today you’ll learn the format of the topics and different ways to…
Being a comics fan, I couldn’t resist publishing a crossover between my “famous” tutorial about using the enc28j60 driver with Arduino and the fresh new tutorial about the MQTT protocol. So, after having introduced the MQTT protocol and explained how to use mosquitto, today I’ll show you how to send data to an MQTT broker using the…
If two devices have to talk to each other, they must adopt the same protocol. In the past, I’ve already shown different types of communication, for example between Arduino and a C# program, Arduino and a website or Arduino and an NTP server. All those communications are point-to-point ones, that is between two actors. Today I’m instead going to introduce you…