diff --git a/libraries/esp8266/examples/CheckFlashConfig/CheckFlashConfig.ino b/libraries/esp8266/examples/CheckFlashConfig/CheckFlashConfig.ino
new file mode 100644
index 000000000..c8ba8d244
--- /dev/null
+++ b/libraries/esp8266/examples/CheckFlashConfig/CheckFlashConfig.ino
@@ -0,0 +1,32 @@
+/* 
+ ESP8266 CheckFlashConfig by Markus Sattler
+ 
+ This sketch tests if the EEPROM settings of the IDE match to the Hardware
+ 
+ */
+
+void setup(void) {
+    Serial.begin(115200);
+}
+
+void loop() {
+
+    uint32_t realSize = ESP.getFlashChipRealSize();
+    uint32_t ideSize = ESP.getFlashChipSize();
+    FlashMode_t ideMode = ESP.getFlashChipMode();
+
+    Serial.printf("Flash real id:   %08X\n", ESP.getFlashChipId());
+    Serial.printf("Flash real size: %u\n\n", realSize);
+
+    Serial.printf("Flash ide  size: %u\n", ideSize);
+    Serial.printf("Flash ide speed: %u\n", ESP.getFlashChipSpeed());
+    Serial.printf("Flash ide mode:  %s\n", (ideMode == FM_QIO ? "QIO" : ideMode == FM_QOUT ? "QOUT" : ideMode == FM_DIO ? "DIO" : ideMode == FM_DOUT ? "DOUT" : "UNKNOWN"));
+
+    if(ideSize != realSize) {
+        Serial.println("Flash Chip configuration wrong!\n");
+    } else {
+        Serial.println("Flash Chip configuration ok.\n");
+    }
+
+    delay(5000);
+}