espcomm_send_command: can't receive command response header

[Prabhu-Electro]

log:
Dated on 13/10/2018

$:~/WorkSpace/Hardware/esptool$ sudo ./esptool -cd nodemcu -cp /dev/ttyUSB0 -cb 115200 -ca 0x00000000 -cf AT_Firmware.bin
[sudo] password for su:
Uploading 1044480 bytes from AT_Firmware.bin to flash at 0x00000000
..........................................................error: failed reading byte
warning: espcomm_send_command: can't receive command response header
warning: espcomm_send_command(FLASH_DOWNLOAD_DATA) failed
error: espcomm_upload_mem failed