I solved by setting SDMMC to 1-line mode (SDMMC_HOST_FLAG_1BIT); in this mode the pins 4,12,13 are available, so I used pins 16 and 13 for a second hardware serial.

Federico

"Like all peripherals, the pins for the UARTs can be logically mapped to any of the available pins on the ESP32. " I tried with pins 16 and 14 (RX2, TX2) and it seems to work, many thanks. Still taking advantage of your availability, on ESP32-CAM, if I use the sd card, in addition to pin 16, there ...

Why would you use softserial on a chip with 2 hardware serial? I'm sorry, I'm new to ESP32 and in the pinout of the ESP32-CAM module I only see U2RXD on GPIO16, but I don't see a U2TXD! The GPIO17 (U2TXD) on the chip does not seem to be usable in this module. So, how can I use the second hardware s...

Hallo, has anyone tried to use EspSoftwareSerial ( https://github.com/plerup/espsoftwareserial ) with ESP32-CAM? I tried with simple tests to connect it with Arduino Uno and it works well, but as soon as I use it with the CamerWebServer sketch, ESP32-Cam can no longer identify the camera! I tried wi...