i recently tried adding a Bluetooth serial interface to my code and exceeded the esp32 prog mem space.
the found that the SerialtoSerialBT example requires 864k bytes or 65% of memory.
while the .o files add up to 148k in my code, the elf file is 582k with WiFi
i'm hoping someone can point me to a smaller bluetooth library or some other solution, potentially processor board with more memory but also WiFi and bluetooth.
just realized this may not be the best forum to post this (feel free to move)