App says device is online but wont control project

[PeteKnight]

@drivinggun

int DB=2;//Left reverse

The “2” in the code above means GPIO Pin 2. This is not the same as the pin that’s labelled “D2” on the board. The Blue LED on the board is connected to GPIO2 and is active (lit) when the pin is pulled LOW.

See this diagram for the mapping of GPIO numbers to pin labels:

You should also read this topic about “safe” pins to use:

ESP8266 GPIO pins info, restrictions and features

hi blynkers! the esp8266 mcu is widely used in iot projects. however, most gpio pins on this mcu have special / multiple functionality and are not safe to use in all circumstances. these “features” are still not well documented and not explained in a friendly manner for newbies. i see lots of cases when the “issues” are simply caused by not knowing which pins to use in which case. [esp8266 pin features] here is a basic table for startup. i’ve collected the info from various sources on the i…

Pete.