Flashing ESP8266 module

please help…

when i try to flash ESP8266 module i cant get this…

Password:
esptool.py v2.0-beta3
Connecting…
A fatal error occurred: Failed to connect to Espressif device: Timed out waiting for packet header
Thisuns-MacBook-Pro:esptool-master thisunsudaraka$

please help me… im frustrated… :cry:

Not really a Blynk specific issue… have you tried Googling your error?

https://www.google.com/search?q=A+fatal+error+occurred%3A+Failed+to+connect+to+Espressif+device%3A+Timed+out+waiting+for+packet+header&oq=A+fatal+error+occurred%3A+Failed+to+connect+to+Espressif+device%3A+Timed+out+waiting+for+packet+header&aqs=chrome..69i57j69i64l3&sourceid=chrome&ie=UTF-8