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63 lines
3.8 KiB
Markdown
63 lines
3.8 KiB
Markdown
This page lists possible blink codes of the red LED located on the ESP32-CAM board, their meaning and possible solutions.
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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).
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# General design approach:
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* 250ms blink code to identify source
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* 500ms defined LED off
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* 250ms blink code to identify error / status code
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* 1,5s LED off to signal repetition
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* e.g. 3x blinks | 500ms LED off | 2x blinks --> error: SD card not found
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| **source** | source blink count| error / status | status blink count| repeat infinite |
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| ------------- | ----------------- |---------------------------------------| ---------------- | -----------------|
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| FLASHLIGHT | N/A | LED on when flashlight is on (lowest prio) | solid, no blinking
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| WLAN_CONN | 1 | Disconnected (No Access Point) | 1 |
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| WLAN_CONN | 1 | Disconnected (Authentication failure) | 2 |
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| WLAN_CONN | 1 | Disconnected (Timeout) | 3 |
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| WLAN_CONN | 1 | Disconnected (Error code, misc error) | 4 |
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| WLAN_INIT | 2 | WLAN.ini empty or not readable | 1 | X
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| WLAN_INIT | 2 | SSID or password empty | 2 | X
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| WLAN_INIT | 2 | WIFI init error (details console) | 3 | X
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| SDCARD_INIT | 3 | SD card filesystem mount failed | 1 | X
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| SDCARD_INIT | 3 | SD card not found (0x107) | 2 | X
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| SDCARD_INIT | 3 | SD card init failed (details console) | 3 | X
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| SDCARD_CHECK | 4 | Basic check: file creation/write error| 1 | X
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| SDCARD_CHECK | 4 | Basic check: file read/CRC error | 2 | X
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| SDCARD_CHECK | 4 | Basic check: file delete error | 3 | X
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| SDCARD_CHECK | 4 | Basic check: folder/file presence | 4 | X
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| CAM_INIT | 5 | Camera init failed (details console) | 1 | X
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| CAM_INIT | 5 | Camera framebuffer check failed | 2 |
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| PSRAM_INIT | 6 | PSRAM init failed: Not found/defective| 1 | X
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| PSRAM_INIT | 6 | External PSRAM < 4MB | 2 | X
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| PSRAM_INIT | 6 | Total heap < 4MB | 3 | X
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| TIME_CHECK | 7 | Missing time sync (check every round) | 1 |
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| OTA_OR_AP | 8 | OTA process ongoing | 1 | X
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| OTA_OR_AP | 8 | Soft AP started | 2 | X
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From here -->TODO!!!
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# Error
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Those errors make the normal operation of the device impossible.
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Most likely they are caused by a hardware issue!
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## `0x00000001` PSRAM bad
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Your device most likely has no PSRAM at all or it is too small (needs to have at least 4 MBytes)!
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See [Hardware Compatibility](../Hardware-Compatibility).
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Usually the log shows something like this:
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```
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psram: PSRAM ID read error: 0xffffffff
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cpu_start: Failed to init external RAM!
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```
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# Status
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Those Errors can be caused by an error during initialization. It is possible that the error has no impact at all or that a reboot solves it.
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## `0x00000100` Cam Framebuffer bad
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The firmware was unable to initialize the Camera Framebuffer.
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The firmware will continue to work, but other consequential error might arise.
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A reboot of the device might help.
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