What do you mean by "when I make some micro power cut" ? Before that you said it works well. You've added 1000uF, now you want to add a low voltage detector. Why not just provide a ~500mA power supply in the first place instead of all these workarounds? It's not like it's consuming 500mA all the tim...

You are missing a pull up resistor from RST to 3.3v. You just have a cap and a button, nothing will charge the cap. 10k R is typical, reference the esp32 hardware design guide. You should base your design off existing hardware that is known to work, like the many esp32 dev boards that publish their ...

If the high current is only for a short duration, you could ride it out with a lot of capacitance, 100's uF. But it's probably easier to just upgrade the power supply to properly match the ESP32. If you really can't provide the power required, maybe you could look for a different micro with lower po...

You can inspect the schematic, there is no 5V level shifting for the GPIO. The only thing taking 5V is the usb connector, the CP21 usb to serial, and the LDO. https://www.google.com/url?sa=t&source=web&rct=j&url=https://dl.espressif.com/dl/schematics/esp32_devkitc_v4-sch.pdf&ved=2ahUKEwjpzNqa56ntAhW...

Probably because the purpose of the devkitc board is to use the ESP32. What are you looking to do with the board? Solder on the ESP32 yourself for soldering practice? Or use some different micro? Maybe you could contact the manufacturer of the devkitc , see if they would do a pcba run and NC (no com...

https://docs.espressif.com/projects/esp ... iver-usage

5, 18, 19, 23

GPIO34 to 39 are input only and have no internal pull-up / pull-down resistor. They are floating, so that could explain the spurious 0.4V you are measuring.

ADC calibration is not related to micropython. You could do adc calibration in C, or in Arduino IDE, or in micropython. (micropython is nice though, that's what I use and would recommend) Have you tried using a multimeter or oscilloscope yet? Compare the actual voltage on the pin to what your analog...

Can you share any schematic or diagram of what you're actually connecting? The ESP-PROG has a usb-to-serial chip FT2232 on it. The DevKitC also has usb-to-serial CP2102. So you should only be using one at a time. If you tried to use both, they are both trying to put signals onto the TX/RX lines to t...

If you are trying to sell this commercially as an end product, the RF certification matters. The WROOM / WROVER modules are precertified. If you use an ESP32 chip or ESP32-PICO, you would probably have to pay $1000's for RF certification testing on your end product. https://www.reddit.com/r/esp32/co...