Hello There . I’ve programmed using the Arduino IDE ESP8266-12 using the example of a standalone module . But trying LEDs depends on the BLYNK program GPIO5 button is pressed GPIO4 pins . You need a firmware update do ? What is the problem? Sorry for bad english 
problem solved. ESP8266-12 -E module and replace GPIO5 different GPIO4 pins .
Great that you figured it out… But the problem is unclear. can you tell us more about what was wrong?
I’m using this ESP 12, which is quite common. I stumbled across the same issue, namely that the label for GPIO4 and GPIO5 (red arrows) are exchanged. GPIO4 is actually 5 and vice versa.
Apart from that it’s a nice board… it comes with a 7333-A voltage regulator (thus you can attach up to 15 V directly to the board), it has a jumper to enable flashing (though it does not put GPIO15 low, which I need to do when flashing with arduino) and it normaly features an analog optic sensor (green circle, removed it) a RGB LED (GPIO12, 13, 15) for quick testing…
So, the problem is in the board itself… right?
ESP8266-12 two different models . No fault in BLNYK programs. thanks.Sorry, new users can’t put images in posts.
ESP8266-12 E GPIO5 - GPIO4
**http://shoppinglist.nu/esp12/pin_map-esp-12.png
ESP8266-12 GPIO4 - GPIO5
**https://daflabs.com/media/catalog/product/cache/1/image/1200x/040ec09b1e35df139433887a97daa66f/e/s/esp-12back.jpg
