LoRa - Sensor Data

Projects Networking, Protocols, and Devices
1

Hello everyone.

I'm going to create a Lora network.

My task is to read 10 sets of sensors (3 sensors per set, communicating via I2C).

I want each measurement system to be managed by Arduino MKR WAN 1310.

The 11th set will be the master. It will be Arduino MKR WAN 1310 connected to Arduino with Ethernet.

Arduino with ethernet will send data to the Siemens PLC.

The question is, will I need Geatway to send data using Lora?

I don't need internet communication.

Can 10pcs Arduino MKR WAN 1310 send information to one? Is there addressing in LoRa communication?

Maybe there is an easier way to complete my task?

The sensors are placed at a large distance.

I am asking for help and sorry for my lack of knowledge about LoRa. I am a PLC programmer.

2

The radio sends the data. What do you imagine the gateway to do?

The sensors are placed at a large distance.

From what? I2C connections must be very short.

Keep in mind that LoRa radio connection require line-of-sight between transmitter and receiver.

I don't need internet communication.

You do require an internet connection to post data on IoT cloud.

3

Yes.

But it depends on how often.

No. You need to add it, easy enough.

What are the distances, senders to receivers ?

Why LoRa ?

4

Data does not need to be sent frequently. Let's say every 10 minutes.

During this period, MKR WAN 1310 will filter and reconcile measurements and send 3 measurement results every 10 minutes.

The measuring station consists of:

  • Lora MKR WAN 1310 transmitter;
  • 3 sensors located directly with i2C communication.

Measuring stations are located 100-1000m away from the master.

The master is to read data from all slaves and send it to the PLC.

5

What is the environment, as in what is between transmitters and receivers ?

6

The environment is a field of seedlings. Yes this is the distance between slave and master.

9

The environment is a field of seedlings. Yes this is the distance between slave and master.

10

you will have to experiment but 100-1000 metres should be OK
I would tend to have the master poll the slave devices - have a look at need-advice-on-a-home-project

11

If you have clear line of sight between all slave and master nodes, you don't need a network. The slaves can all send data directly to the master, each slave with a unique ID so that the master can determine which sender.

To avoid message collisions, send the data at random intervals, where each slave chooses a random wait (around some mean time) between transmissions.

12

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