Slave or master?

[Fluxanode]

I think this is a master lib? Is this the querying device or data serving device? I've been working with modbus for a while, and believe the device that queries the network of sensors is the master or client and the data device being asked for data is the slave or host or server.

Definition:

In Modbus communication, the terms "master" and "slave" refer to the roles devices play in the network:

Modbus Master:
The master is the central controller in a Modbus network.
It initiates communication by sending requests to one or more slaves.
The master decides when and how the data is exchanged, controlling the timing of communication.
There is typically only one master in a Modbus network.

Modbus Slave:
A slave device responds to the requests from the master.
It waits for queries from the master and cannot initiate communication on its own.
Multiple slave devices can be connected to the network, each with a unique address.
Examples of slave devices include sensors, actuators, and controllers that provide data or accept commands.
In summary, the Modbus master controls the communication and requests data or actions, while the Modbus slave provides data or performs actions when requested.

So is the a lib for a master or slave as defined above?

Another question, will this work with a teensy 4.1?