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ESP32 Cam PSRAM Usage

Q&A Forum › ESP32 Cam PSRAM Usage
0 Vote Up Vote Down
Jose Rivera asked 11 months ago
5 Answers
1 Vote Up Vote Down
Best Answer
Sara Santos Staff answered 11 months ago

Hi Jose.
I’m sorry for taking so long to get back to you.
It seems I missed your question,
 
Answering your question; I’m not sure. But I think it uses it when you need to stream video and take pictures in higher resolutions as well as performing tasks like face detection and recognition. For example, ESP32-CAM boards without PSRAM can’t do face detection and recognition using the ESPCameraWebServer default example.
 
Regards,
Sara

0 Vote Up Vote Down
Jose Rivera answered 11 months ago

I check the size of the PSRAM after doing a esp_camera_fb_get() and this what I get:
PSRAM found: Yes
22:36:08.356 -> Total PSRAM: 4194252
22:36:08.514 -> Free PSRAM : 4194252
22:36:08.514 -> Used PSRAM : 0
When the ESP32-CAM start using the PSRAM instead of the local RAM ?
Thanks

0 Vote Up Vote Down
Barry answered 11 months ago

Jose
I’m not doing the cam, but would like to know how you checked the PSRAM size. I’ve a custom made pcb with ESP32-WROOM-32U-4
Thanks
Barry

0 Vote Up Vote Down
Jose Rivera answered 11 months ago

For Barry:
void printRamUsage(const String message)
{
Serial.print(“\n– RAM USAGE “); Serial.print(message); Serial.println(” –“);
Serial.printf(“Total heap : %d\n”, ESP.getHeapSize());
Serial.printf(“Free heap : %d\n”, ESP.getFreeHeap());
Serial.printf(“PSRAM found: %s\n”, psramFound()?”Yes”:”No”);
Serial.printf(“Total PSRAM: %d\n”, ESP.getPsramSize());
Serial.printf(“Free PSRAM : %d\n”, ESP.getFreePsram());
Serial.printf(“Used PSRAM : %d\n”, ESP.getPsramSize() – ESP.getFreePsram());
Serial.printf(“Free Memory: %d\n\n”, GET_FREE_MEMORY());
}// end printRamUsage()
 

0 Vote Up Vote Down
Barry answered 11 months ago

Jose
Thank you! Muchas Gracias!
I suspect this needs the ESP.h lib installed (looking at the commands). I’ll try to find that.
Barry
 

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