How to fix NodeMCU V3 board not detect on your computer (MB522 board)?

    STEP 1 Supply 5VDC power to position 1 as shown in the figure, and then connect the USB cable that comes from the computer in position 2.

     STEP 2 Go to the Devices Manager section of your computer. (In case you can't find it, Right click on My Computer or this PC on the Desktop, then select Properties. You will notice a message Devices Manager, click on it).

    STEP 3 Observe the Ports (COM & LPT) as shown in the picture, it is USB-SERIAL CH340 (COM6), that is the Com Port location of the NodeMCU V3 board on our computer (Some machines may be different).