KC64WIFI is a C64 userport modem up to 9600 baud based on a NodeMCU module with custom code to support hayes commands.
It includes a RESET switch that resets both C64 and NodeMCU and a power supply jumper to choose if power up the NodeMCU from C64 or from an external power supply connected to NodeMCU usb port.
NodeMCU code is upgradeable via usb link.
Check the config instructions to get an idea of how to use CCGMS terminal and a list of active BBS.
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