I have an esp32 Dev kit v1 (maybe clone). I loaded blink ino on it. Power via USB is fine.
When I use VIN Pin with 5v to 7v it does not start (USB detached). My power supply shows voltage break-in down to 1.7v and current draws max allowed. If I allow 200 or 300ma, the esp draws it.
Also powering via 3.3vand GND is not possible. don't remember current and if there is also voltage drop.
Coming from Arduino uni / nano/ mini I am very surprised.
Does anyone has an idea?