ESP8266 Community Forum

I have bought a new ESP-01 but never have managed to make it work. At first I never got a "Ready" in Serial Monitor. The buy updating its firmware to the latest 9.2.2 one still the same. The AI Thinker, still the same.

Now Like I said, updating finishes successfull, uploading sketch works but when i disconnect the gpio0 pin from ground and restart the esp-01 sketch doesnt run. I get nothing on the serial monitor, not even giberish.

I am using a FTDI USB Serial to write everything to it and make the communication.

Anyone has the slightest idea what could be wrong?

Make sure GPIO15 is connected to GND for it to boot into the sketch.

As a general check, this is how I'm connecting mine to work(post yours to check on differences as I have an ESP12E):

GPIO15 to GND
GND to GND
EN to VCC
VCC to VCC
RX to UART TXD
TC to UART RXD

GPIO0 needs to be connected to GND only to allow flashing (sketch uploading).

Are you using a genuine FDTI or is it a cheap one from China?

Hi,

I bought new ESP8266-12. The wifi network is not visible, AT commands are not working. But i was able to flash using "Flash download tools" for windows (Got from espressif website)
Flash was successful. It did not fail.



Please help.