diff --git a/docs/StatusLED-BlinkCodes.md b/docs/StatusLED-BlinkCodes.md
index d37eb60..281e22e 100644
--- a/docs/StatusLED-BlinkCodes.md
+++ b/docs/StatusLED-BlinkCodes.md
@@ -2,7 +2,42 @@ This page lists possible blink codes of the red LED located on the ESP32-CAM boa
 
 The effective error codes can be found [here](https://github.com/jomjol/AI-on-the-edge-device/blob/rolling/code/components/jomjol_helper/statusled.h).
 
-TODO!!!
+# General design approach:
+
+  * 250ms blink code to identify source
+  * 500ms defined LED off
+  * 250ms blink code to identify error / status code
+  * 1,5s LED off to signal repetition
+  * e.g. 3x blinks | 500ms LED off | 2x blinks --> error: SD card not found
+
+| **source**    | source blink count| error / status                        | status blink count| repeat infinite |
+| ------------- | ----------------- |---------------------------------------| ---------------- | -----------------|
+| FLASHLIGHT    | N/A               | LED on when flashlight is on (lowest prio) | solid, no blinking
+| WLAN_CONN     | 1                 | Disconnected (No Access Point)        | 1                |
+| WLAN_CONN     | 1                 | Disconnected (Authentication failure) | 2                |
+| WLAN_CONN     | 1                 | Disconnected (Timeout)                | 3                |
+| WLAN_CONN     | 1                 | Disconnected (Error code, misc error) | 4                |  
+| WLAN_INIT     | 2                 | WLAN.ini empty or not readable        | 1                | X
+| WLAN_INIT     | 2                 | SSID or password empty                | 2                | X
+| WLAN_INIT     | 2                 | WIFI init error (details console)     | 3                | X
+| SDCARD_INIT   | 3                 | SD card filesystem mount failed       | 1                | X
+| SDCARD_INIT   | 3                 | SD card not found (0x107)             | 2                | X
+| SDCARD_INIT   | 3                 | SD card init failed (details console) | 3                | X
+| SDCARD_CHECK  | 4                 | Basic check: file creation/write error| 1                | X
+| SDCARD_CHECK  | 4                 | Basic check: file read/CRC error      | 2                | X
+| SDCARD_CHECK  | 4                 | Basic check: file delete error        | 3                | X
+| SDCARD_CHECK  | 4                 | Basic check: folder/file presence     | 4                | X
+| CAM_INIT      | 5                 | Camera init failed (details console)  | 1                | X
+| CAM_INIT      | 5                 | Camera framebuffer check failed       | 2                | 
+| PSRAM_INIT    | 6                 | PSRAM init failed: Not found/defective| 1                | X
+| PSRAM_INIT    | 6                 | External PSRAM < 4MB                  | 2                | X
+| PSRAM_INIT    | 6                 | Total heap < 4MB                      | 3                | X
+| TIME_CHECK    | 7                 | Missing time sync (check every round) | 1                |
+| OTA_OR_AP     | 8                 | OTA process ongoing                   | 1                | X
+| OTA_OR_AP     | 8                 | Soft AP started                       | 2                | X
+
+
+From here -->TODO!!!
 
 # Error
 Those errors make the normal operation of the device impossible.