im running the 5v needed to power it from the usb port as every one iv talked to say that's how they run it. so im not sure if the 2 end pins need connecting as its getting its 5v from the usb. from my understanding pin14 is en- and en+ goes to 5v on the end . only from what iv seen on other videos. so this is how I have it. some one has told me I don't need to wire in the en- for now just for testing but I have tried it both ways and it still the same. To be honest im going round and round in circles with this now