Some Error Messages

I have an Aquarium control Project. I’m using Arduino Mega and ESP8266 and Blynk
I want to load my codes but I’m taking error messages. how can I solve it ?

warning: espcomm_sync failed
error: espcomm_open failed
error: espcomm_upload_mem failed
error: espcomm_upload_mem failed

espcomm error is well documented on the Arduino forums.

Can be a whole host of things like port already open in another program, wrong baud rates, temporary failure etc.

Start by posting your formatted sketch as bad code will give espcomm errors.