ESP8266 Community Forum

- Wed Oct 14, 2015 2:13 am #31303

I think I might have a CP2102 at home. I think it only pushes out 5v?
That one seems it does 3.3v though? Does it require you to soldier two joins together to bring down the voltage?

Mine has both 3.3v and 5v outputs; however, I have been powering the ESP from the 5v output, using a DC-DC converter (this one: http://www.ebay.com/itm/121623570949).

- Wed Oct 14, 2015 9:24 pm #31368 Okay, I got it. WOW This is a big Deal. I've wasted two weeks and multiple hours and dollars trying to figure this out to come to find that the issue was my USB to UART.

I ordered one of these http://www.amazon.com/gp/product/B009T2ZR6W

and it worked like a charm for RX and TX only. The VCC peice, I pulled from the product I listed on my opening post. It Nativly supported 3.3v

That is alot of wasted this and this should be documented that if it flunks out during the flash to get a different adapter like the one above.

Anyways thanks for your HELP!!!

- Fri Oct 16, 2015 5:36 pm #31556 I would recommend you use a logic level converter, I'm using sparkfun's . works great..
can handle 4 line but I only us Tx,Rx. Unit has LV side [3.3] and HV side {5].
very small approx size of quarter... I solder HV directly to the USB adapter and run wires from
LV to ESP breadboard..