ESP8266 Community Forum

- Thu Dec 15, 2016 12:52 pm #59536 Hello guys,I am complete rookie on esp8266. I have been using esp8266 esp-01 with arduino uno for my project.At first I flashed a blynk sketch on the esp8266 and then I erased that using esp8266 flash tool https://www.hackster.io/user720003162/connecting-esp8266-01-to-arduino-uno-mega-and-blynk-194f17?f=1#comments by following this article. But It can not show any result to AT commands but when I upload an esp8266 blink sketch it works fine. this is my schematic look like for BareMinimum sketch.For the record,before I flashed it first place it had just worked once for AT commands.

Sorry for long post and bad english

- Thu Dec 15, 2016 3:28 pm #59541 Hi, once you flash the ESP with a new sketch it replaces the old sketch. As you have flashed blynk the old sketch that used AT commands has now gone. If you want to use AT commands again you will have to flash the manufactures sketch.

- Fri Dec 16, 2016 11:17 am #59582 I did flash the ESP using esp8266 flash tool with "AT22SDK100-2015-03-20-boot1.2" this bin. I have followed some tutorials and flash tool worked same as the tutorials https://www.hackster.io/user720003162/connecting-esp8266-01-to-arduino-uno-mega-and-blynk-194f17?f=1#comments . But AT command doesn't work. Is there any other way that I can flash the ESP or make sure it was flashed correctly?? TIA