WiNet connects to the stove communication port or, when no external port is available, directly to the electronic board. Always check compatibility and connector type before working on the stove.
This is the classic serial port found on many compatible pellet stoves. With the correct cable, connection is normally straightforward.

Some stoves use a 4-pin serial connector, including certain Extraflame ranges. Do not use unverified adapters.

On some stoves the intended connection is internal, on the electronic control board. The exact point depends on the electronics family and manufacturer.