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For projects that I follow I should remotely control two relays, if possible with Yotta A12xx products. I have a contact (digital output of a PLC) that I should transmit without a cable to one or two relays placed in different places.
So I would like to know if the modules are based on an existing network or can they create a point-to-point communication between them without the need for other components?
As you can see in this article Yotta WiFi modules can be configured to connect to any existing WiFi network. So you can definitely connect them to your WiFi network and control them using the Modbus TCP protocol.
So in your case if your PLC has the ability to manage the Modbus TCP protocol in master mode it can connect to the various Yotta modules (each will have its own specific IP address) and manage the I / O of the module.
Yotta modules cannot exchange data with each other but can only act as Modbus TCP slaves, therefore it is always necessary to have a master to manage them.
If your PLC cannot manage the Modbus TCP protocol you can connect the I / O of your PLC to those of a module Compact Ethernet CPU and with this manage the various Yotta modules via WiFi.
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