Hello, I am new to Blynk.
In order to concure “Fail to disable echo”, it looks we need AT version:0.22.0.0(Mar 20 2015 10:04:26) -SDK version:1.0.0 as best choice according to below post
https://github.com/blynkkk/blynk-library/wiki/ESP8266-with-AT-firmware
Pls help tell me where can I get it… Thx a lot!!!