ESP8266 Community Forum

- Sun Aug 23, 2015 11:04 am #26884 Hi ESP Community!
(Sorry for my eventually bad english, I'm german )

I have a strange problem when I'm trying to upload code to my esp8266 with the arduino IDE
Everything worked fine, I experimented with my own web server and it worked perfectly well, but suddenly, I couldn't upload any code to my ESP any more.

I'm using an USB to UART Converter for programming and as soon as I hit the upload button, the blue status LED on my ESP blinks a few times as if it was receiving code, but then an error occurred in the Arduino IDE.

Here is the full upload log:

"trying to connect
flush start
setting serial port timeouts to 1 ms
setting serial port timeouts to 1000 ms
flush complete
espcomm_send_command: sending command header
espcomm_send_command: sending command payload
read 0, requested 1
warning: espcomm_sync failed
error: espcomm_open failed"

I really don't know why it refuses to receive code, I double checked all my connections and properties in the Arduino IDE.

I'm using:
- an ESP8266-01
- an USB to UART Converter
Software:
-Arduino IDE 1.6.5 with the ESP8266 Community Addon

- Mon Aug 24, 2015 3:25 pm #26972 Is your problem solved already?

"espcomm_open failed" -> USB to UART may be used by a terminal programm (PuTTY e.g.)?

"espcomm_sync failed" -> Bad signal? I had to solder a capacitor via 3V3 + GND

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Have fun!

- Sun Sep 13, 2015 1:59 pm #28983 Hi,

I have exactly the same problem.
Can you resolve it ?

Thanks a lot