ESP8266 Community Forum

Posted: **Tue Dec 02, 2014 3:31 am**

I am using USART 3.3V, power module with 3.3V power supply, I connected TX - (ESP8266) RX, RX - (ESP8266) TX and CH_PD to VCC, the baud rate of 57600 or 115200.
When I send AT commands (eg. AT, AT + RST, AT + GMR) receives nothing.
The modul ESP-07 have more pins, maybe i must connect more GPIO but i don't know what i must connect.
When do I pull-up or pull-down I must use external resistor?

Posted: **Tue Dec 02, 2014 3:55 am**

Connect Gpio15 to gnd

Posted: **Tue Dec 02, 2014 4:09 am**

I connected GPIO15 to GND (with resistor and without) nothing change.

Posted: **Tue Dec 02, 2014 6:35 am**

Does the chip enter firmware upload mode with GPIO0 low? Have you tried flashing the firmware? Some modules come without any firmware installed.

ESP8266 Community Forum

Problem communicating with the ESP8266 (ESP-07)

Problem communicating with the ESP8266 (ESP-07)

Re: Problem communicating with the ESP8266 (ESP-07)

Re: Problem communicating with the ESP8266 (ESP-07)

Re: Problem communicating with the ESP8266 (ESP-07)