Hi,

In addition to this, I would like to ask you to kindly help me understand how I can physically structure the connection between the various components in a Modbus RTU architecture.

I was told, thanks to a previous ticket, that MCUs are needed to control Modbus requests and translate sensor data into serial communication. Now I wanted to show you this pattern that I drew and ask if it spun the pattern logically.

I would like to make connections on the breadboard and I need to know examples of devices, sensors and possible compatibility.

 

RS485 is a daisy chains structure, not a star structure. Therefore there can be no hub. Each item on the bus links to one or two others - no more. If it only links to one other, then there should be a 120Ω termination resistor instead of a connection to a second item.

 

RS485 is a daisy chains structure, not a star structure. Therefore there can be no hub. Each item on the bus links to one or two others - no more. If it only links to one other, then there should be a 120Ω termination resistor instead of a connection to a second item.

I apologize, I accidentally posted the wrong pattern. I just edited and now you should see the schema. If you think it's feasible with the MCUs I've indicated, if considerations need to be made for physical layer connections, or anything else, please tell me

P.S. The schema on the left is a schema that a user pointed to in another ticket. The schematic on the right is what I'm trying to achieve