ESP-IDF for Arduino Users, Tutorials Part 1: Logging

This is the first part of a series of ESP-IDF tutorials that I will complete as I learn stuff.

Consider the following Arduino code:


I call this the “Arduino debugger”. It’s a joke. Arduino has no debugger — don’t be silly, Ali! It’s not really debugging, it’s logging.

How do we do logging on ESP-IDF? Well, it’s remarkably easy. Let’s look at it and then you should read the documentation.

My notes

  • The logging macros are in “esp_log.h”
#include "esp_log.h"
  • Set the logging level in menuconfig.
$ menuconfig
  • Navigate to: Components -> Log Output -> Default log verbosity
  • Define a TAG, e.g.
static const char* TAG = “FruityModule”;
  • Call the log methods
ESP_LOGD(TAG, “I am a banana”);
  • Look, printf style is available too
ESP_LOGD(TAG, “I am a banana and I am %d years old”, age);
  • Multiple levels of the macros are available
ESP_LOGE — error (lowest)ESP_LOGW — warningESP_LOGI — infoESP_LOGD — debugESP_LOGV — verbose (highest)

Complete example

#include "esp_log.h"static const char* TAG = "main-main";void app_main(void)
ESP_LOGD(TAG, "begin");

This tutorial is part of a series. Read the next part: Delay.

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