Dear associates!
I ask to help me with the solution of a task:
I try to realize a gateway on basis of Arduino UNO, which is possible to connect sensors on RS-485 and RFM69 radio interfaces.
The Arduino is required to be connected in local network.
For this I plan to connect MAX485 module with AltSoftSerial library according to the following scheme:
D8 -> RO,
D9 -> DI,
D10 -> not used,
D2 -> RE/DE.
At the same time I plan to put the Ethernet W5100 module which standard scheme:
D13 -> SCK,
D12 -> MISO/SO,
D11 -> MOSI/SI,
D10 -> SS/CS.
And the RFM69 module with the adjusted scheme:
D7 -> DIOO,
A2 -> MISO,
A1 -> MOSI,
A0 -> SCK,
D6 -> NSS.
I'm not sure for 100% that Arduino will be able to support all these modules at the same time.
But that most of all concerns me, this simultaneous use of pin D10 - MAX485 and W5100 modules.
What I can make in this situation? Whether modules will work or what changes it will be required to make?

@AWI
Dear AWI, thank you very much, I will try!:smiley:

@AWI
Dear AWI,
I can ask you to print out the sketch CardDB.h /.cpp? I'm afraid it isn't rather skilled to write independently it. Thank You.

@AWI
Dear AWI! Good work!
I used ready solutions of control of access in the practice.
Now I study Arduino and want to try to repeat your experiment.
I have a question to you: tell please what contains in the CardDB.h file?
As for the reader, for activation of the beeper and a led you use transistor assemblies in addition? Connecting +5 volts on them with Arduino, as on the scheme, for example: