Unable to see new wifi after flashing ESP8266

Hey guys,

I bought an esp module and flashed it using the below guide:

It seemed like flashing the chip was successful[see logs below], however after flashing it and rebooting it in a non flash mode, I do not see any additional wifi that I can connect to, nor am I able to ping the 192.168.4.1 :

arpit@arpit-ThinkPad-P51:~/Drone/ESP8266$ esptool.py -p /dev/ttyUSB0 -b 921600 write_flash 0x00000 firmware-1.2.2.bin 
esptool.py v4.5.1
Serial port /dev/ttyUSB0
Connecting...
Detecting chip type... Unsupported detection protocol, switching and trying again...
Connecting...
Detecting chip type... ESP8266
Chip is ESP8266EX
Features: WiFi
Crystal is 26MHz
MAC: 60:01:94:49:62:64
Stub is already running. No upload is necessary.
Changing baud rate to 921600
Changed.
Configuring flash size...
Flash will be erased from 0x00000000 to 0x00051fff...
Compressed 332768 bytes to 232984...
Wrote 332768 bytes (232984 compressed) at 0x00000000 in 3.7 seconds (effective 712.4 kbit/s)...
Hash of data verified.

Leaving...
Hard resetting via RTS pin...
arpit@arpit-ThinkPad-P51:~/Drone/ESP8266$ 

Is there anything I am missing ? If anyone has any experience in this, can they guide me. Would also appreciate any lead to a reliable ESP8266 vendor that works out of the box with QGroundcontrol