ESP8266 Community Forum

- Wed May 22, 2019 4:22 pm #82434 Hello all,
I have started working with ESP8266 with NodeMCU. Now I switched to the single ESP8266 E12-Module.

My problem ist now, that I aren't able to write data on the Chip. I use the "CP2102"-Module as USB-to-UART-Interface. I'm sure, that I wired the Chip properly.

Some strange thing is, that the TX-LED is only flashing (if I try to load some code to the Chip), If I connect the RESET-Pin to Ground.

What have I done?

- external power supply with 3A
- GPIO1 and GPIO0 to GND
- EN/CH to 3,3V
- TX and RX connected with USB-to-UART-Interface

Do you have some suggestions, what could be wrong?

Ps.: Arduino-IDE shows following error-code:
"esptool.FatalError: Failed to connect to ESP8266: Timed out waiting for packet header"

- Sat May 25, 2019 4:33 pm #82481 So - I have an update....

Flashing and programming of the board is now possible.
I can't really say, what solved the problem, because I tried so many things...

I'm very happy now.

Could someone close the post???