Add wifi, nvs and inplace_function implementations

components/nvs/src/nvs.cpp

@@ -0,0 +1,26 @@
+#include <stdexcept>
+
+#include "esp_err.h"
+#include "nvs_flash.h"
+
+
+namespace nvs {
+
+
+void init() {
+
+    esp_err_t ret = nvs_flash_init();
+    if (ret == ESP_ERR_NVS_NO_FREE_PAGES ||
+        ret == ESP_ERR_NVS_NEW_VERSION_FOUND) {
+
+        if (nvs_flash_erase() != ESP_OK)
+            throw std::runtime_error("Failed to erase NVS");
+
+        ret = nvs_flash_init();
+    }
+
+    if (ret != ESP_OK) throw std::runtime_error("Failed to initialize NVS");
+}
+
+
+} // namespace nvs