Add exception wrapper for esp_err_t

qthing/error.cpp

+#include "error.hpp"
+
+void qthing::errorCodeToException(esp_err_t errorNumber) {
+  if (errorNumber != ESP_OK) {
+    throw EspError(errorNumber);
+  }
+}

qthing/include/error.hpp

+#pragma once
+
+#include <exception>
+
+#include "esp_err.h"
+
+// qthing public
+
+namespace qthing {
+
+class EspError : public std::exception {
+ public:
+  const esp_err_t errorNumber;
+  EspError(esp_err_t errorNumber) : errorNumber(errorNumber) {}
+  const char* what() const noexcept { return esp_err_to_name(errorNumber); }
+};
+
+void errorCodeToException(esp_err_t errorNumber);
+
+}  // namespace qthing

qthing/include/qthing.hpp

@@ -2,6 +2,7 @@
 
 #define QTHING_HIDE_PRIVATE_API
 
+#include "error.hpp"
 #include "network.hpp"
 #include "power.hpp"
 #include "qthing_legacy.hpp"