Can't start Wi-Fi module ESP8266. Doesn't respond to commands. Where to look for a problem?

Question

Arduino

Can't start Wi-Fi module ESP8266.
Connected according to the scheme:
VCC output - board power (+ 3.3V);
The GND pin is common;
Outputs URXD, UTXD - connect to the USB-to-RS232 converter (in 3.3V mode)
Output CH_PD - connect to the power supply of the board (+3.3V);
The module does not respond to commands. The red power indicator LED is on.
Where to look for a problem?

Answer 1

Try here, step by step.
esp8266.ru/esp8266-podkluchenie-update-proshivki

Answer 2

Artem, the other day I tried to connect the module 07 of the model, so for 2 days I could not connect at all! The problem turned out to be outrageously simple, I connected an external 5V power supply through a 3.3V converter and everything worked (do not forget to combine the grounds of different power sources).

Answer 3

To whom it will be interesting - just solved a similar problem. I connected directly to the USB-TTL adapter (I am the lucky owner of an adapter with 3.3V power). He didn’t respond at all, he played with speed - he began to show signs of life (and additional power was not needed).
In general, you need to study the mat part and connect it correctly (at least all divorced pins must be connected).