initial commit

domestic-climate-monitor/.gitignore

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+# ESP-IDF Build Output
+build/
+sdkconfig
+sdkconfig.old
+*.pyc
+
+# Dependencies
+dependencies.lock
+managed_components/
+
+# Flash Download Tool
+flash_project_args
+
+# VS Code
+.vscode/
+*.code-workspace
+
+# Eclipse
+.cproject
+.project
+.settings/
+
+# CLion
+.idea/
+cmake-build-*/
+
+# Emacs
+*~
+\#*\#
+.\#*
+
+# Vim
+*.swp
+*.swo
+*~
+
+# macOS
+.DS_Store
+
+# Windows
+Thumbs.db
+
+# Python virtual environments (for ESP-IDF)
+venv/
+.venv/
+env/
+.env/
+
+# Component build artifacts
+**/*.o
+**/*.a
+**/*.so
+**/*.elf
+**/*.bin
+**/*.map
+
+# Logs
+*.log
+
+# Menuconfig backups
+sdkconfig.defaults.*
+!sdkconfig.defaults
+
+# pytest cache
+.pytest_cache/
+__pycache__/
+
+# Coverage files
+*.gcno
+*.gcda
+*.gcov
+
+# Secrets 
+
+secrets.h

domestic-climate-monitor/CMakeLists.txt

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+
+cmake_minimum_required(VERSION 3.16)
+# This env var is sourced from:
+#		. /opt/esp-idf/export.sh
+#		when the compilation terminal session starts
+include($ENV{IDF_PATH}/tools/cmake/project.cmake)
+project(domestic-climate-monitor)

domestic-climate-monitor/main/CMakeLists.txt

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+idf_component_register(SRCS "main.c" "wifi.c"
+                    INCLUDE_DIRS ".")

domestic-climate-monitor/main/main.c

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+#include "esp_log.h"
+#include "freertos/FreeRTOS.h"
+#include "freertos/event_groups.h"
+#include "freertos/task.h"
+#include "nvs_flash.h"
+
+#include "wifi.h"
+
+static const char *TAG = "main";
+void setup(void) {
+  ESP_ERROR_CHECK(nvs_flash_init());
+  wifi_connect();
+}
+
+void loop(void) {
+  ESP_LOGI(TAG, "Loop running...");
+  vTaskDelay(pdMS_TO_TICKS(1000));
+}
+
+void app_main(void) {
+  setup();
+
+  while (1) {
+    loop();
+  }
+}

domestic-climate-monitor/main/wifi.c

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+#include "esp_event.h"
+#include "esp_log.h"
+#include "esp_wifi.h"
+#include "freertos/event_groups.h"
+#include "freertos/task.h"
+#include "secrets.h"
+
+// `TAG` is common naming convention for logs in ESP-IDF
+static const char *TAG = "wifi"; // Logs are coming from this wifi module. TAG =
+// common naming convention for logs in ESP-IDF
+static EventGroupHandle_t s_wifi_event_group;
+static int s_retry_num = 0;
+
+#define WIFI_CONNECTED_BIT BIT0
+#define WIFI_FAIL_BIT BIT1
+#define MAX_RETRY 5
+
+static void wifi_event_handler(void *arg, esp_event_base_t event_base,
+                               int32_t event_id, void *event_data) {
+  if (event_base == WIFI_EVENT && event_id == WIFI_EVENT_STA_START) {
+    esp_wifi_connect();
+  } else if (event_base == WIFI_EVENT &&
+             event_id == WIFI_EVENT_STA_DISCONNECTED) {
+    if (s_retry_num < MAX_RETRY) {
+      esp_wifi_connect();
+      s_retry_num++;
+      ESP_LOGI(TAG, "Retrying connection...");
+    } else {
+      xEventGroupSetBits(s_wifi_event_group, WIFI_FAIL_BIT);
+    }
+  } else if (event_base == IP_EVENT && event_id == IP_EVENT_STA_GOT_IP) {
+    ESP_LOGI(TAG, "Connected! Got IP");
+    s_retry_num = 0;
+    xEventGroupSetBits(s_wifi_event_group, WIFI_CONNECTED_BIT);
+  }
+}
+
+void wifi_connect(void) {
+  s_wifi_event_group = xEventGroupCreate();
+  ESP_ERROR_CHECK(esp_netif_init());
+  ESP_ERROR_CHECK(esp_event_loop_create_default());
+  esp_netif_create_default_wifi_sta();
+
+  wifi_init_config_t cfg = WIFI_INIT_CONFIG_DEFAULT();
+  ESP_ERROR_CHECK(esp_wifi_init(&cfg));
+
+  esp_event_handler_instance_t instance_any_id;
+  esp_event_handler_instance_t instance_got_ip;
+  ESP_ERROR_CHECK(esp_event_handler_instance_register(
+      WIFI_EVENT, ESP_EVENT_ANY_ID, &wifi_event_handler, NULL,
+      &instance_any_id));
+  ESP_ERROR_CHECK(esp_event_handler_instance_register(
+      IP_EVENT, IP_EVENT_STA_GOT_IP, &wifi_event_handler, NULL,
+      &instance_got_ip));
+
+  wifi_config_t wifi_config = {
+      .sta =
+          {
+              .ssid = SECRETS_WIFI_SSID,
+              .password = SECRETS_WIFI_PASS,
+          },
+  };
+  ESP_ERROR_CHECK(esp_wifi_set_mode(WIFI_MODE_STA));
+  ESP_ERROR_CHECK(esp_wifi_set_config(WIFI_IF_STA, &wifi_config));
+  ESP_ERROR_CHECK(esp_wifi_start());
+
+  // Wait for connection
+  EventBits_t bits = xEventGroupWaitBits(s_wifi_event_group,
+                                         WIFI_CONNECTED_BIT | WIFI_FAIL_BIT,
+                                         pdFALSE, pdFALSE, portMAX_DELAY);
+
+  if (bits & WIFI_CONNECTED_BIT) {
+    ESP_LOGI(TAG, "WiFi connected successfully");
+  } else {
+    ESP_LOGE(TAG, "WiFi connection failed");
+  }
+}

domestic-climate-monitor/main/wifi.h

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+#ifndef WIFI_H
+#define WIFI_H
+
+void wifi_connect(void);
+
+#endif // WIFI_H