[ESP8266] How to connect GPIO15, GPIO2, GPIO0 in ESP-12-E for flashing and UART?

Hello,
I have a question about the ESP12-E module and specifically about this one and not another e.g. ESP12.

How to connect GPIO15 GPIO2 GPIO0 in order to:
1. to upload the soft to flash
2. to communicate via the UART from ESplorer

And what is the baud rate?

bartosz.tarnowski wrote:

I have a question about the ESP12-E module and specifically about this module and not another e.g. ESP12.

.
They all work in the same way.

bartosz.tarnowski wrote:

How to connect GPIO15 GPIO2 GPIO0 to:
1. upload the flash soft

.

.

bartosz.tarnowski wrote:

2. To communicate via UART from ESplorer

.

bartosz.tarnowski wrote:

And what is the baud rate?

115200

but not the other way round?
Page 9 of the documentation https://www.elecrow.com/download/ESP-12F.pdf
says something different

.

Today I uploaded the nodeMCU twice at 230400 speed.
After uploading the Baud switched to 74880.
But apart from the ESP reporting itself after the reset there is no response.

I am currently unable to flash the ESP.
Yesterday I had the same, overnight the ESP thought itself and today it was possible to reflash it but only 2 times.

Can the other GPIOs hang unconnected.
I am powering from USB so current capacity should be ok.

This is what my circuit looks like

Rather not the other way around. "Flash boot" from the table means boot from flash memory, so it corresponds to "normal boot" from the picture above. I always recorded in 115200 and it worked. Note - at startup, ESP always sends information with 74880 (this happens even before the program starts) and then switches to 115200. Of course, the speed can be changed later by software.

It is interesting that nowhere about this speed 74880 is written and I use a lot of material.

Ultimately, in order not to get neurosis one should:

1. power the ESP with a good power supply
2. connect a high capacitance capacitor to the VCC - GND leads

It has been written in several places that 10u is enough, I connected 47u and it had no effect, I connected 2200u and now it is quite ok although still ESP programming does not always work but it is already much better.