vylint

Yes you will. Both ICC and Solar Assistant sell the cables to communicate with the Pylontech. These are an RS232-USB converter with an RJ11 fitting on the end (for US3000A or B models) or RJ45 for the US3000C. You will need to either buy the correct cable for your batteries or make one using information found here:
 
This seems the easiest to follow to me but there are multiple posts about the connection so search if you need more information.

As does SolPipLog too if I remember correctly. All three options also include direct communication with pylontech batteries through the RJ11 RS232 port on them. I must admit to not getting SolPipLog to work easily but I had already bought ICC by the time I found it so didn't try very hard to get it going.

ICC and solar assistant both use the micro USB port on the VMIII to communicate with the inverter so you can use a regular phone cable as long as it includes the data connections, some of the cheap cables sold at the traffic lights for example don't. The pi then connects to your wifi.