Flashing WiFi module without external 3.3V LDO - big electrolytic capacitor trick on 3.3V

I don't know if this has been published here already, but anyway...

The problem with a USB to TTL dongle not supplying enough current for WiFi to work reliably can be solved with a large electrolytic capacitor between GND and 3V3 like so:



This is good for Beken devices and even more so for ESP8266 and ESP32

Hello,
the following method may work, but it's not recommended.
Attaching large capacitance to the power supply may overload this power supply at the startup time, because the initial capacitor charging current may be many times higher than the maximum current capability of the used power supply.
The same thing applies to attaching capacitance to the USB port. You may notice that if you try to connect too large capacitor to USB, the USB will temporarily disconnect - this is the overcurrent protection kicking in.
So, while your method may work and be fully functional, it's IMHO not a good practice.