Hopefully 
, Arduino was smart and somehow made it so the esp module on R4 is accessible for this sort of situation??… but then comes the task of getting the data from that module over to the main mcu of the R4 through the serial connection ??
Anyways, way above my head. Someone super smart will chime in soon 
. Unfortunately, Another nanoesp32 or even a cheap esp32 devkit from AliExpress for 5$ if you have time to wait for delivery may be much easier