This was my first Linux Day in Turin, and I was late, like very late (as always 😂 ).
I decided to attend the IoT talk ‘cause I’m interested about this topic.
The speaker, @cesco_78, talked about how the tech companies are deploying a lot of devices, rapidly and they haven’t so much worries about security and stuffs like that.
You can find the notes here:
- It’s a network of talking devices
- IoT devices are:
- Home Appliances
- Complex Systems
- It’s gaining a big momentum
- They aren’t secure
There’re a lot of IoT devices
- IPv4 addresses aren’t infinite.
- A lot of them are in mobility so 4G cells are full
- The range is a big problem
They’re a Low Power Wide Area Network. They use free frequencies. The range is great.
LPWAN aren’t Internet backed.
So a cluster of sensors is connected to a gateway. The gateway is then connected to internet.
Less data and slow.
- Packets (Upstream) are of 12 bytes.
- Packets (Downstream) are of 8 bytes.
12 bytes/3 seconds
SigFox uses resellers and it’s a commercial network. The price is big and it’s billed “per-device”.
Western Europe is fully covered.
The advantages are:
- Low energy required;
- Free Roaming;
- Easy to use.
- Nettrotter BIB.
- It’s like SigFox for the tech specifications.
- It has unlimited data rates.
- It’s an open standard.
- There are a lot of providers.
Choosing a low power, data service is difficult. The decision has to be taken “per-project”.
If you have a network (WiFi/3G/4G) and if you want to transfer data without using a lot of bandwidth you can use:
Message Queue Telemetry Transport
- It has a little overhead;
- It uses the IP protocol;
- A lot of big players use it (Facebook, WhatsApp, …).
It uses a broker, subscriber and publisher infrastructure.
- A broker lists topics.
- A subscriber can “subscribe” a topic.
- A publisher can “publish” on a topic.
Configuring a MQTT connection to/from a broker is dead simple.
As you can see, IoT is a great thing.
If we’re able to avoid big manufactures we can get back our data.