Expander 24 relay and 64 relay

[bsarevalo]

Hi everyone, especially Hifikat! ... I am finishing a project and we are using 3 KC868-A6 modules ... for the moment everything is going well ... now our client asked us to expand the outputs of module 1 to 24 relays and of module 2 to 64 relays ... Could you recommend good options for this? ... expansion cards i2c, uart...? If you have the products, you can tell us the reference... surely we are going to buy!