ESP8266 Community Forum

- Sun Aug 30, 2020 2:19 pm #88575 Hello and sorry for my english, isn't my native language.

I bought a NodeMCU 8266 and used it in a couple of projects but, in all of those, i had to power it with an external source power (generally an Arduino, through Vin PIN).
Even to program it, i had to connect always the USB to PC + External Power. If i doesn't use an external power source, the PC doesn't detect it.

Is it normal, or a failure in my unit?

Thanks!

- Mon Aug 31, 2020 12:15 pm #88601 And what exactly would you call "internal power" (= not external power)?

- Mon Aug 31, 2020 12:25 pm #88604

And what exactly would you call "internal power" (= not external power)?

I want the device to work with USB power and not also require an extra (or "external") power through Vin PIN.

For me "internal power" is the USB.

Sorry if it wasn't clear.

- Mon Aug 31, 2020 2:38 pm #88610

Is it normal, or a failure in my unit?

No it is not normal; try some different USB leads as some cheap ones are communication only - no power.