Init: Add node code. Copy paste from EspNowNetwork

.clang-format

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+BreakBeforeBraces: Attach
+ColumnLimit: 120

.github/workflows/clang-format.yaml

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+name: Clang Format CI
+on: [workflow_call, push]
+jobs:
+  formatting-check:
+    name: Formatting Check
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        path:
+          - 'src'
+    steps:
+    - uses: actions/checkout@v3
+    - name: Run clang-format style check for C/C++/Protobuf programs.
+      uses: jidicula/clang-format-action@v4.11.0
+      with:
+        clang-format-version: '13'
+        check-path: ${{ matrix.path }}

.github/workflows/esp_upload_component.yaml

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+name: Push EspNowNetworkNode to Espressif Component Service
+on:
+  release:
+    types: [created]
+jobs:
+  build_examples_for_verification:
+    uses: ./.github/workflows/espidf.yaml
+    with:
+      target_path: "examples/espidf"
+
+  upload_components:
+    runs-on: ubuntu-latest
+    needs: [build_examples_for_verification]
+    steps:
+      - uses: actions/checkout@v4.1.1
+
+      - name: Remove arduino examples and library related files
+        run: rm -rf examples/arduino library.json library.properties
+
+      - name: Remove github actions
+        run: rm -rf .github
+
+      - name: Upload EspNowNetworkNode to component registry
+        uses: espressif/upload-components-ci-action/@v1
+        with:
+          name: "EspNowNetworkNode"
+          namespace: "johboh"
+          api_token: ${{ secrets.ESP_IDF_COMPONENT_API_TOKEN }}

.github/workflows/espidf.yaml

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+name: ESP-IDF CI
+
+on:
+  workflow_call:
+    inputs:
+      target_path:
+        type: string
+        description: 'Path value to select a specific target in the matrix'
+        required: true
+  push:
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+
+    strategy:
+      matrix:
+        version:
+          - name: v44_build
+            version_number: release-v4.4
+            target: esp32c3
+          - name: v51_build
+            version_number: release-v5.1
+            target: esp32c6
+          - name: v52_build
+            version_number: release-v5.2
+            target: esp32c6
+          - name: v53_build
+            version_number: release-v5.3
+            target: esp32c6
+        path:
+          - name: examples/espidf
+
+    steps:
+      - if: github.event_name == 'workflow_call' && matrix.path.name != inputs.target_path
+        run: exit 0
+
+      - uses: actions/checkout@v4.1.1
+
+      - name: ESP-IDF Build
+        uses: espressif/esp-idf-ci-action@v1
+        with:
+          esp_idf_version: ${{ matrix.version.version_number }}
+          target: ${{ matrix.version.target }}
+          path: ${{ matrix.path.name }}

.github/workflows/platformio.yaml

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+name: PlatformIO CI
+
+on:
+  workflow_call:
+    inputs:
+      target_path:
+        type: string
+        description: 'Path value to select a specific target in the matrix'
+        required: true
+  push:
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+
+    strategy:
+      matrix:
+        target:
+          - path: examples/arduino
+            library: library.json
+            remove: ""
+            extra_dependencies: ""
+
+    steps:
+      - if: github.event_name == 'workflow_call' && matrix.target.path != inputs.target_path
+        run: exit 0
+
+      - uses: actions/checkout@v4.1.1
+
+      - uses: actions/cache@v3
+        with:
+          path: |
+            ~/.cache/pip
+            ~/.platformio/.cache
+          key: ${{ runner.os }}-pio
+
+      - uses: actions/setup-python@v4
+        with:
+          python-version: '3.9'
+
+      - name: Install PlatformIO Core
+        run: pip install --upgrade platformio
+
+      - name: Remove files
+        run: rm -rf ${{ matrix.target.remove }}
+        if: ${{ matrix.target.remove }}
+
+      - name: Copy library.json to root (if not src is also in root)
+        run: mv ${{ matrix.target.library }} ./ || true
+        if: ${{ matrix.target.library != './library.json' }}
+
+      - name: Build PlatformIO targets
+        run: ${{ env.PLATFORMIO_CI_BASE_CMD }} --project-option="lib_deps=${{ matrix.target.extra_dependencies }}"
+        env:
+          PLATFORMIO_CI_BASE_CMD: pio ci --lib="." --board=lolin_c3_mini --project-option="build_unflags=-std=gnu++11" --project-option="build_flags=-std=gnu++17" --project-option="platform=espressif32@6.4.0" --project-option="lib_ldf_mode=deep"
+          PLATFORMIO_CI_SRC: ${{ matrix.target.path }}

.github/workflows/platformio_publish.yaml

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+name: Push EspNowNetworkNode to PlatformIO registry
+on:
+  release:
+    types: [created]
+jobs:
+  build_examples_for_verification:
+    uses: ./.github/workflows/platformio.yaml
+    with:
+      target_path: "examples/arduino"
+
+  upload_library:
+    runs-on: ubuntu-latest
+    needs: [build_examples_for_verification]
+    steps:
+      - uses: actions/checkout@v4.1.1
+      - uses: actions/setup-python@v4
+        with:
+          python-version: '3.9'
+
+      - name: ESP IDF CMake stuff
+        run: rm -rf CMakeLists.txt idf_component.yml
+
+      - name: Install PlatformIO Core
+        run: pip install --upgrade platformio
+
+      - name: Publish PlatformIO library
+        run: pio pkg publish --owner johboh --no-notify --no-interactive
+        env:
+          PLATFORMIO_AUTH_TOKEN: ${{ secrets.PLATFORMIO_AUTH_TOKEN }}

.github/workflows/pr.yaml

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+name: PR verification
+on:
+  pull_request:
+    types: [opened, synchronize, reopened]
+jobs:
+  build_espidf_examples_for_verification:
+    uses: ./.github/workflows/espidf.yaml
+
+  build_platformio_examples_for_verification:
+    uses: ./.github/workflows/platformio.yaml
+
+  formatting_check:
+    uses: ./.github/workflows/clang-format.yaml

.gitignore

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+.DS_Store
+/.idea
+/.build
+/.pio
+/out
+/.vscode

CMakeLists.txt

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+FILE(GLOB_RECURSE sources "./src/impl/*.*")
+
+if(IDF_VERSION_MAJOR GREATER_EQUAL 5)
+set(required_components mbedtls esp_wifi esp_http_client esp_partition esp-tls nvs_flash bootloader_support app_update)
+else()
+set(required_components mbedtls esp_wifi esp_http_client esp-tls nvs_flash bootloader_support app_update)
+endif()
+
+idf_component_register(COMPONENT_NAME "esp_now_network_node"
+                        SRCS ${sources}
+                        INCLUDE_DIRS "./src/"
+                        REQUIRES ${required_components})
+
+
+if(IDF_VERSION_MAJOR LESS 5) # 5+ compiles with c++23.
+target_compile_options(${COMPONENT_LIB} PRIVATE -std=gnu++17)
+endif()

examples/arduino/arduino.ino

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+#include <Arduino.h>
+#include <EspNowCrypt.h>
+#include <EspNowNode.h>
+#include <EspNowPreferences.h>
+#include <esp_crt_bundle.h>
+
+#define SLEEP_TIME_US (1000LL * 1000LL * 60LL * 1LL) // 1 minute
+
+// Should be generated by build script.
+#define FIRMWARE_VERSION 90201
+
+// These structs are the application messages shared across the host and node device.
+// Ideally these should live in a shared header file.
+#pragma pack(1)
+struct MyApplicationMessage {
+  uint8_t id = 0x01;
+  double temperature;
+};
+#pragma pack(0)
+
+// Encyption key used for our own packet encryption (GCM).
+// We are not using the esp-now encryption due to the peer limitation.
+// The key should be the same for both the host and the node.
+const char esp_now_encryption_key[] = "0123456789ABCDEF"; // Must be exact 16 bytes long. \0 does not count.
+
+// Used to validate the integrity of the messages.
+// The secret should be the same for both the host and the node.
+const char esp_now_encryption_secret[] = "01234567"; // Must be exact 8 bytes long. \0 does not count.
+
+unsigned long _turn_of_led_at_ms = 0;
+
+// Callback for logging. Can be omitted.
+EspNowNode::OnLog _on_log = [](const std::string message, const esp_log_level_t log_level) {
+  if (log_level == ESP_LOG_NONE) {
+    return; // Weird flex, but ok
+  }
+
+  std::string level;
+  switch (log_level) {
+  case ESP_LOG_NONE:
+    level = "none";
+    break;
+  case ESP_LOG_ERROR:
+    level = "error";
+    break;
+  case ESP_LOG_WARN:
+    level = "warning";
+    break;
+  case ESP_LOG_INFO:
+    level = "info";
+    break;
+  case ESP_LOG_DEBUG:
+    level = "debug";
+    break;
+  case ESP_LOG_VERBOSE:
+    level = "verbose";
+    break;
+  default:
+    level = "unknown";
+    break;
+  }
+
+  Serial.println(("EspNowNode (" + level + "): " + message).c_str());
+};
+
+// Status callback. Can be omitted.
+EspNowNode::OnStatus _on_status = [](EspNowNode::Status status) {
+  switch (status) {
+  case EspNowNode::Status::HOST_DISCOVERY_STARTED:
+    break;
+  case EspNowNode::Status::HOST_DISCOVERY_SUCCESSFUL:
+    break;
+  case EspNowNode::Status::HOST_DISCOVERY_FAILED:
+    break;
+  case EspNowNode::Status::INVALID_HOST:
+    break;
+  case EspNowNode::Status::FIRMWARE_UPDATE_STARTED:
+    break;
+  case EspNowNode::Status::FIRMWARE_UPDATE_SUCCESSFUL:
+    break;
+  case EspNowNode::Status::FIRMWARE_UPDATE_FAILED:
+    break;
+  case EspNowNode::Status::FIRMWARE_UPDATE_WIFI_SETUP_FAILED:
+    break;
+  }
+};
+
+EspNowPreferences _esp_now_preferences;
+EspNowCrypt _esp_now_crypt(esp_now_encryption_key, esp_now_encryption_secret);
+EspNowNode _esp_now_node(_esp_now_crypt, _esp_now_preferences, FIRMWARE_VERSION, _on_status, _on_log,
+                         arduino_esp_crt_bundle_attach);
+
+void setup() {
+  Serial.begin(115200);
+
+  _esp_now_preferences.initalizeNVS();
+
+  // Setup node, send message, and then go to sleep.
+  if (_esp_now_node.setup()) {
+    MyApplicationMessage message;
+    message.temperature = 25.6;
+    _esp_now_node.sendMessage(&message, sizeof(MyApplicationMessage));
+  }
+
+  esp_deep_sleep(SLEEP_TIME_US);
+}
+
+void loop() {}

examples/espidf/CMakeLists.txt

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+# The following five lines of boilerplate have to be in your project's
+# CMakeLists in this exact order for cmake to work correctly
+cmake_minimum_required(VERSION 3.5)
+include($ENV{IDF_PATH}/tools/cmake/project.cmake)
+project(example)

examples/espidf/Makefile

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+#
+# This is a project Makefile. It is assumed the directory this Makefile resides in is a
+# project subdirectory.
+#
+
+PROJECT_NAME := example
+
+include $(IDF_PATH)/make/project.mk

examples/espidf/main/CMakeLists.txt

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+FILE(GLOB_RECURSE app_sources *.*)
+
+idf_component_register(
+    SRCS ${app_sources}
+    INCLUDE_DIRS "."
+)
+
+target_compile_options(${COMPONENT_LIB} PRIVATE -std=gnu++17)

examples/espidf/main/component.mk

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+#
+# "main" pseudo-component makefile.
+#
+# (Uses default behaviour of compiling all source files in directory, adding 'include' to include path.)

examples/espidf/main/idf_component.yml

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+dependencies:
+  EspNowNetworkNode:
+    path: ../../../.