First of all my ESP8266 01 was up and running with blynk service as well as it worked smoothy all AT commands .. since last 2 days I tried some other firmware and then It is not responding any AT commands and nothing is displayed in the serial monitor, not even my input , red LED constantly on. I tried so much google but no luck .. I bought another ESP8266 .. It also keep remain same..
I re-flashed the esp8266 with https://github.com/espressif/ESP8266_AT but no luck
My connection is :
GND -> GND
VCC -> ARDUINO 3.3v
CH_PD -> ARDUINO 3.3v
TX -> ARDUINO RX
RX -> ARDUINO TX
I also tried FT232 TTL , what else I can do