I have 2 repeaters i would like to set up to connect to myGMRS. One is a Kenwood TKR-850, and one is an Icom FR-4000. Can anyone help me with the 25 pin connections that need to be connected to make this happen? Is there any certain set up in each of the repeaters I will have to program? Will a Raspberry Pi 4B work? Will the Pi connect wireless by Wi-Fi or does it have to be hard wired? Can you connect an external device for like severe weather?