Three UARTs on ESP32 with integrated flash
Posted: Fri Oct 19, 2018 10:14 am
Hi all,
I have noticed that for units with integrated flash, some pins (*) are used for connecting the embedded flash and are not recommended for other uses.
(*) GPIO16, GPIO17, SD_CMD, SD_CLK, SD_DATA_0 and SD_DATA_1
Datasheets: ESP32-PICO-D4 rev 1.3 and ESP32 rev 2.4
I want to use three UARTs, but to me it seems that UART2 conflicts with the 'reserved' pins for the flash.
pin 25-GPIO16: CS and U2RXD
pin 27-GPIO17: D0 and U2TXD
We use the ESP32-PICO-D4, because of the integrated crystal and flash.
Is it possible to remap UART2 to other GPIO pins?
Thanks in advice,
Arno
I have noticed that for units with integrated flash, some pins (*) are used for connecting the embedded flash and are not recommended for other uses.
(*) GPIO16, GPIO17, SD_CMD, SD_CLK, SD_DATA_0 and SD_DATA_1
Datasheets: ESP32-PICO-D4 rev 1.3 and ESP32 rev 2.4
I want to use three UARTs, but to me it seems that UART2 conflicts with the 'reserved' pins for the flash.
pin 25-GPIO16: CS and U2RXD
pin 27-GPIO17: D0 and U2TXD
We use the ESP32-PICO-D4, because of the integrated crystal and flash.
Is it possible to remap UART2 to other GPIO pins?
Thanks in advice,
Arno