ESP-IDF on ESP32-D0WDQ6 or ESP32-WROOM with 3 UART and 1 I2C

[mmartinez]

Hello everyone,

I'm currently designing a PCB with an ESP32-WROOM and we would like to develop the main application using ESP-IDF. The problem is that we need at least 3 UART and 1 I2C. Would it be possible to use them given that the module has the external SPI flash memory ocuppying UART1? Can the UART1 pins be remapped to othe pins?

We don't really need the external SPI flash, could we mount a ESP32-D0WDQ6 without the memory and develop the application with ESP-IDF?

[ESP_houwenxiang]

Hi, mmartinez

The UART pin can remap to any input-able and output-able GPIO

[WiFive]

You do really need the external flash because there is no internal flash.

[mmartinez]

Hi, mmartinez

The UART pin can remap to any input-able and output-able GPIO

Great, I will try it.

You do really need the external flash because there is no internal flash.

I missed the line in the datasheet that says that the internal ROM is for booting and core functions.

Thank you very much for your replies.

Is the ESP32-D0WDQ6 IC ready to be used with ESP-IDF by default or would it need any previuos configuration? I would like to use this IC directly, connect a flash memory and program it using UART0 directly.

[ESP_Sprite]

Yes, when combined with the flash and other needed components. Suggest you refer to the ESP32 hardware design guidelines and perhaps use the schematics of e.g. the esp32-wrover module as a cheat sheet.