ESP8266 Community Forum

I am facing problem with uploading code to esp8266 .
All the connection are correct.
Esp8266_sync_failed
Esp8266_upload_mem_failed
How to rectify this error?

Many things can cause this....

1. Wrong serial port
2. Wrong serial speeds (115200 recommended to start)
3. Bad power supplies
4. Bad connections including grounds....
5. Wrong chip connected....
6. ESP8266 not in bootloader mode due to I/O pin issues

You need to carefully check these.

RichardS