first platformIO

04_platformio_esp32_fist_project/.gitignore

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+.pio
+.vscode/.browse.c_cpp.db*
+.vscode/c_cpp_properties.json
+.vscode/launch.json
+.vscode/ipch

04_platformio_esp32_fist_project/.vscode/extensions.json

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+{
+    // See http://go.microsoft.com/fwlink/?LinkId=827846
+    // for the documentation about the extensions.json format
+    "recommendations": [
+        "platformio.platformio-ide"
+    ],
+    "unwantedRecommendations": [
+        "ms-vscode.cpptools-extension-pack"
+    ]
+}

04_platformio_esp32_fist_project/include/README

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+
+This directory is intended for project header files.
+
+A header file is a file containing C declarations and macro definitions
+to be shared between several project source files. You request the use of a
+header file in your project source file (C, C++, etc) located in `src` folder
+by including it, with the C preprocessing directive `#include'.
+
+```src/main.c
+
+#include "header.h"
+
+int main (void)
+{
+ ...
+}
+```
+
+Including a header file produces the same results as copying the header file
+into each source file that needs it. Such copying would be time-consuming
+and error-prone. With a header file, the related declarations appear
+in only one place. If they need to be changed, they can be changed in one
+place, and programs that include the header file will automatically use the
+new version when next recompiled. The header file eliminates the labor of
+finding and changing all the copies as well as the risk that a failure to
+find one copy will result in inconsistencies within a program.
+
+In C, the convention is to give header files names that end with `.h'.
+
+Read more about using header files in official GCC documentation:
+
+* Include Syntax
+* Include Operation
+* Once-Only Headers
+* Computed Includes
+
+https://gcc.gnu.org/onlinedocs/cpp/Header-Files.html

04_platformio_esp32_fist_project/lib/README

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+
+This directory is intended for project specific (private) libraries.
+PlatformIO will compile them to static libraries and link into the executable file.
+
+The source code of each library should be placed in a separate directory
+("lib/your_library_name/[Code]").
+
+For example, see the structure of the following example libraries `Foo` and `Bar`:
+
+|--lib
+|  |
+|  |--Bar
+|  |  |--docs
+|  |  |--examples
+|  |  |--src
+|  |     |- Bar.c
+|  |     |- Bar.h
+|  |  |- library.json (optional. for custom build options, etc) https://docs.platformio.org/page/librarymanager/config.html
+|  |
+|  |--Foo
+|  |  |- Foo.c
+|  |  |- Foo.h
+|  |
+|  |- README --> THIS FILE
+|
+|- platformio.ini
+|--src
+   |- main.c
+
+Example contents of `src/main.c` using Foo and Bar:
+```
+#include <Foo.h>
+#include <Bar.h>
+
+int main (void)
+{
+  ...
+}
+
+```
+
+The PlatformIO Library Dependency Finder will find automatically dependent
+libraries by scanning project source files.
+
+More information about PlatformIO Library Dependency Finder
+- https://docs.platformio.org/page/librarymanager/ldf.html

04_platformio_esp32_fist_project/platformio.ini

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+; PlatformIO Project Configuration File
+;
+;   Build options: build flags, source filter
+;   Upload options: custom upload port, speed and extra flags
+;   Library options: dependencies, extra library storages
+;   Advanced options: extra scripting
+;
+; Please visit documentation for the other options and examples
+; https://docs.platformio.org/page/projectconf.html
+
+[env:esp32dev]
+platform = espressif32
+board = esp32dev
+framework = arduino
+monitor_speed = 115200

04_platformio_esp32_fist_project/src/blink.cpp.txt

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+#define LED_BUILTIN 2
+void setup() {
+  pinMode(LED_BUILTIN, OUTPUT);
+}
+
+void loop() {
+  digitalWrite(LED_BUILTIN, HIGH);  
+  delay(1000);                      
+  digitalWrite(LED_BUILTIN, LOW);   
+  delay(1000);                      
+}

04_platformio_esp32_fist_project/src/main.cpp

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+#define LED_BUILTIN 2
+
+#include <Arduino.h>
+
+/*
+ * GetMacAddress
+ *
+ * This sketch prints out the MAC addresses for different interfaces.
+ *
+ * Written by: Daniel Nebert
+ *
+ * The first printed MAC address is obtained by calling 'esp_efuse_mac_get_default'
+ * (https://docs.espressif.com/projects/esp-idf/en/release-v5.1/esp32/api-reference/system/misc_system_api.html#_CPPv425esp_efuse_mac_get_defaultP7uint8_t)
+ * which returns base MAC address which is factory-programmed by Espressif in EFUSE.
+ *
+ * The remaining printed MAC addresses is obtained by calling 'esp_read_mac'
+ * (https://docs.espressif.com/projects/esp-idf/en/release-v5.1/esp32/api-reference/system/misc_system_api.html#_CPPv412esp_read_macP7uint8_t14esp_mac_type_t)
+ * and passing in the 'esp_mac_type_t' type.
+ * (https://docs.espressif.com/projects/esp-idf/en/release-v5.1/esp32/api-reference/system/misc_system_api.html#esp__mac_8h_1a1b19aca597277a2179682869c140477a)
+ *
+
+esp_mac_type_t values:
+
+  ESP_MAC_WIFI_STA - MAC for WiFi Station (6 bytes)
+  ESP_MAC_WIFI_SOFTAP - MAC for WiFi Soft-AP (6 bytes)
+  ESP_MAC_BT - MAC for Bluetooth (6 bytes)
+  ESP_MAC_ETH - MAC for Ethernet (6 bytes)
+  ESP_MAC_IEEE802154 - if CONFIG_SOC_IEEE802154_SUPPORTED=y, MAC for IEEE802154 (8 bytes)
+  ESP_MAC_BASE - Base MAC for that used for other MAC types (6 bytes)
+  ESP_MAC_EFUSE_FACTORY - MAC_FACTORY eFuse which was burned by Espressif in production (6 bytes)
+  ESP_MAC_EFUSE_CUSTOM - MAC_CUSTOM eFuse which was can be burned by customer (6 bytes)
+  ESP_MAC_EFUSE_EXT - if CONFIG_SOC_IEEE802154_SUPPORTED=y, MAC_EXT eFuse which is used as an extender for IEEE802154 MAC (2 bytes)
+
+*/
+
+#include "esp_mac.h"  // required - exposes esp_mac_type_t values
+
+
+String getDefaultMacAddress() {
+
+  String mac = "";
+
+  unsigned char mac_base[6] = {0};
+
+  if (esp_efuse_mac_get_default(mac_base) == ESP_OK) {
+    char buffer[18];  // 6*2 characters for hex + 5 characters for colons + 1 character for null terminator
+    sprintf(buffer, "%02X:%02X:%02X:%02X:%02X:%02X", mac_base[0], mac_base[1], mac_base[2], mac_base[3], mac_base[4], mac_base[5]);
+    mac = buffer;
+  }
+
+  return mac;
+}
+
+String getInterfaceMacAddress(esp_mac_type_t interface) {
+
+  String mac = "";
+
+  unsigned char mac_base[6] = {0};
+
+  if (esp_read_mac(mac_base, interface) == ESP_OK) {
+    char buffer[18];  // 6*2 characters for hex + 5 characters for colons + 1 character for null terminator
+    sprintf(buffer, "%02X:%02X:%02X:%02X:%02X:%02X", mac_base[0], mac_base[1], mac_base[2], mac_base[3], mac_base[4], mac_base[5]);
+    mac = buffer;
+  }
+
+  return mac;
+}
+
+
+void setup() {
+
+  Serial.begin(115200);
+
+  pinMode(LED_BUILTIN, OUTPUT);
+
+  Serial.println("Interface\t\t\t\t\t\tMAC address (6 bytes, 4 universally administered, default)");
+
+  Serial.print("Wi-Fi Station (using 'esp_efuse_mac_get_default')\t");
+  Serial.println(getDefaultMacAddress());
+
+  Serial.print("WiFi Station (using 'esp_read_mac')\t\t\t");
+  Serial.println(getInterfaceMacAddress(ESP_MAC_WIFI_STA));
+
+  Serial.print("WiFi Soft-AP (using 'esp_read_mac')\t\t\t");
+  Serial.println(getInterfaceMacAddress(ESP_MAC_WIFI_SOFTAP));
+
+  Serial.print("Bluetooth (using 'esp_read_mac')\t\t\t");
+  Serial.println(getInterfaceMacAddress(ESP_MAC_BT));
+
+  Serial.print("Ethernet (using 'esp_read_mac')\t\t\t\t");
+  Serial.println(getInterfaceMacAddress(ESP_MAC_ETH));
+}
+
+void loop() {
+  digitalWrite(LED_BUILTIN, HIGH);  
+  delay(1000);                      
+  digitalWrite(LED_BUILTIN, LOW);   
+  delay(1000);                      
+}
+

04_platformio_esp32_fist_project/test/README

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+
+This directory is intended for PlatformIO Test Runner and project tests.
+
+Unit Testing is a software testing method by which individual units of
+source code, sets of one or more MCU program modules together with associated
+control data, usage procedures, and operating procedures, are tested to
+determine whether they are fit for use. Unit testing finds problems early
+in the development cycle.
+
+More information about PlatformIO Unit Testing:
+- https://docs.platformio.org/en/latest/advanced/unit-testing/index.html