I am trying to connect multiple arduinos (or in general ATMEGAS) to a PC via the RS485 connector. As far as I know, I need to use a RS485 to TTL converter inbetween to cope the different voltage levels. I found this device here: "TTL to RS-485 module" (https://www.amazon.de/MAX485-module-RS-485-TTL-MTS1EU/dp/B017A676EY/ref=sr_1_4?ie=UTF8&qid=1538492552&sr=8-4&keywords=MAX485), which also seems to be the only suitably device for this purpose. Do you know alternative devices?
What do I have to consider beside the things I mentioned? Did I forget something important? I read about some end-resistors that are needed between the datalines of RS485, what about that? Is the device I mentioned suitable for any microcontroller with 3.3V / 5 V TTL or does this only work with arduino? Thanks.