RN-XV from Roving Networks is a pin-compatible replacement for XBee serial radios that provides 802.11 WiFi connectivity instead. It acts as a UART to WiFi bridge, giving a raw TCP connection to any IP address for both incoming and outgoing communication. It can be easily interfaced with the Commodore 64 user port at 2400 baud to add WiFi functionality, though it requires a 5V to 3.3V converter and connecting both pins B and C on the user port RxD line.

1. • RN-XV from Roving Networks is a pin-compatible replacement for the popular XBee serial
radios from Digi, giving you 802.11 Wifi instead.
• UART to Wifi bridge aka “Wifly”
• Gives a raw TCP connection to any IP address (also incoming)
• Trivial to interface to C64 user port
@ 2400 baud
• To watch out for:
• Needs 5V/3.3v conversion (Adafruit makes a board)
• RxD on User Port needs both pins B+C connected!
• ASCII only
Photo Credit: Mark Martin
Wifi for the Commodore 64