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AT through SDIO

Overview

This demo is based on libat_core.a, and it's a replacement for AT through UART. Since SDIO AT is similar to SDIO demo , it is highly recommended to first read SDIO demo README carefully and run the basic demo of SDIO before using this program.

More details about SDIO slave are in documentation SDIO slave

Hardware Introduction

ESP32 AT through SDIO use the following pins to communicate with the MCU:

  • GPIO14 is CLK
  • GPIO15 is CMD
  • GPIO2 is DAT0
  • GPIO4 is DAT1
  • GPIO12 is DAT2
  • GPIO13 is DAT3

For more details, please refer to sdio_AT_User_Guide.md in the docs directory.

Note: If you're using a board (e.g. WroverKit v2 and before, PICO, DevKitC) which is not able to drive GPIO2 low on downloading, be sure to do some preprocessing with README firstly.