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:

Serial.println(“begining”);

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.

$ idf.py 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 — warning
ESP_LOGI — info
ESP_LOGD — debug
ESP_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.