ESP8266 Community Forum

- Tue Jul 21, 2015 12:30 pm #23850 Hi!

Are you sure about the 0 ohm resistors?
I bought a set of one ESP8266/12E together with such an adaptor.
And there are three 10kohm resistors on my adaptor board!!

They are soldered and connected like this:

Vcc IN --> [R1, 10k] --> pin 16 (Vcc) --> [R2, 10k] --> pin 11 (CH_PD)
GND IN --> Pin 1 (GND) --> [R3, 10k] --> pin2 (GPIO15)

R1...R3 from left to right.
So R2 is used as a pull up and R3 is used as a pull down.
But why is there a resistor in line with the power supply?

Didn't get it to work with my 3.3V power supply.
Unfortunately I broke my adaptor board's traces while desoldering the ESP.

- Tue Jul 21, 2015 2:40 pm #23859

Are you sure about the 0 ohm resistors?
I bought a set of one ESP8266/12E together with such an adaptor.
And there are three 10kohm resistors on my adaptor board!!

I'm pretty sure about that. Unless there are multiple revisions of that board, the middle one should be 0 ohm (you can even read the markings in the first post's photo). If all are 10k, they probably screwed up in production.
No wonder your board won't work with a 10k resistor in series with the power supply, since this will limit the current draw to 1/3 mA. If you still have a board with intact traces, you could just remove the wrong resistor and replace it with a piece of wire or a blob of solder.

- Wed Jul 22, 2015 7:17 am #23915 Thanks for the suggestions! In the end, I just bridged the VCC to the trace and got on with playing