ESP32-CAM Current Measure

I try to understand ESP32-CAM module power consumption.

There is FireBeetle Board-ESP32 board without camera, that has 10uA consumption "out of the box" (schematic).

ESP32-CAM schematic:

There are a lot of excess and not optimal components.

First, compile code with Platformio (Arduino-ESP32 framework).

platformio.ini file:

[env:esp32cam]platform = espressif32framework = arduinoboard = esp32camupload_port = /dev/cu.wchusbserial1410upload_speed = 115200

main.cpp

#include "Arduino.h"void setup(){esp_sleep_enable_timer_wakeup(60 * 1000000);esp_deep_sleep_disable_rom_logging();esp_deep_sleep_start();} void loop() {}

Module "out of the box" 2800uA

Remove camera: 1800uA

Unsolder AMS1117 LDO. No LDO, no camera: 400uAadding this code safe about 100uA.

pinMode(OUTPUT_OPEN_DRAIN, GPIO_NUM_12);pinMode(OUTPUT_OPEN_DRAIN, GPIO_NUM_15);

Now 260uA. Good.

Define CONFIG_ULP_COPROC_ENABLED 1 or 0 not affected.

Where is 10uA ?!Add adc_power_off(); not affected.

Remove PSRAM memory.

Now ~170uA. Good.

Change env:esp32cam to env:esp32dev in platformio.ini cause we cut off some memory.... =).

Unsolder LED doesn't affect.

Let see OV2640 camera datasheet. I saw, that OV2640 can be shut-off.

To be continued... (My research time is over, sorry)