ESP8266 Community Forum

- Thu Oct 01, 2015 1:09 pm #30273 I'm referring to the pinout names as described in this link :

http://s16.postimg.org/utxuwpo39/Capture.png

In flashing mode my connections are :

RXD --> TXD
GPIO0 --> RST
GPIO2 --> VCC
GND --> GND
VCC --> VCC (+3.3V)
RST --> left unconnected
CH_PD --> VCC
TXD --> RXD

While in normal operation mode my connections are :

RXD --> TXD
GPIO0 --> VCC
GPIO2 --> VCC
GND --> GND
VCC --> VCC (+3.3V)
RST --> left unconnected
CH_PD --> VCC
TXD --> RXD

maybe it's the RST pin that stayed unconnected ??

- Thu Oct 01, 2015 1:39 pm #30276

maybe it's the RST pin that stayed unconnected ??

I don't know if it is the cause, but it is definitively a good practice to have that one pulled-up too ...

- Thu Oct 01, 2015 1:51 pm #30277 Do you mean that after flashing, I will connect the RST pin to VCC for not resetting it again...
Yep ?

- Thu Oct 01, 2015 2:13 pm #30285 No, I means all RST/CH_PD/GPIO2/GPIO0 should be pulled-up and GPIO15 pulled-down (this one is for ESP other than ESP-01).
So, the only thing required to do the upload is to temporarily bring GPIO0 to GND during power up.
Every other pins stays as before.