The ESP32 uses external flash (typically 4MB or more) for storing firmware, while the internal ROM is used for boot and essential operations. The code executes from external flash via the SPI interface, with the bootloader managing loading it into memory.

You can try using the UART bootloader method by connecting the ESP8685-WROOM-03 to a USB-to-UART adapter.

This may be an issue with how the RTC wake-up functionality interacts with the 17.5MHz oscillator. You should be able to wake up after a software reset with that clock, but it's possible there's a bug or conflict in how the RTC is configured.

You can connect dual cameras to an ESP32 using modules like the OV2640 and I2S interface. Consider using the ESP32-S3 for better processing power and more GPIOs for stereo camera handling.

You can assess datasheet to view the circuit diagram and understand how to start to use their module: https://www.espressif.com/sites/default/files/documentation/esp32-wroom-32e_esp32-wroom-32ue_datasheet_en.pdf
Often they provide simple power supply instructions and a startup reset circuit design ...

Thanks for the reply! I’ll definitely check out Espressif’s hardware design resources and take a closer look at sensor datasheets for reference circuits. Also, good call on posting in the hardware forum might get more targeted help there.

ADC input impedance is usually high, often in the Megaohms range, but may not always be listed. For high impedance sources, consider using a buffer op-amp to ensure accurate readings.

It looks like ESP-IDF 4.0 doesn’t have a direct function for setting DNS, but you can manage it through the network interface settings in the LWIP stack. DNS is typically assigned via DHCP, but if you need to set it manually, you’ll need to adjust the network configuration accordingly. Have you ...

The slower WiFi connection on the "box" module could be due to antenna performance (affected by enclosure), power stability (voltage drops during WiFi init), firmware corruption, or factory calibration differences in NVS. Try reflashing firmware, erasing NVS, and ensuring stable power. Testing ...

Hello everyone,

I’m working on an Industrial IoT sensor node using an ESP32 for real-time data acquisition and wireless communication. The project involves integrating multiple sensors (temperature, humidity, vibration) with the ESP32, and I’m designing a custom PCB to streamline the connections ...