Mini Nano V3.0 ATmega328P Microcontroller Board with USB Cable for Arduino (2pcs Boards+2pcs Cables)

Couldn't program it until I looked up how to set up the Arduino IDE properly. You have to set (in "Tools"): Board: Arduino Nano Processor: ATmega328P (Old Bootloader) Port: COMn: where n is usually 9 or above - it will pop up on the menu. Never COM1: (which is on the motherboard of your computer.) After trying to communicate a bunch of other settings, I found this in another Amazon review. If you still can't communicate after this, reboot your computer because Arduino IDE sometimes scrambles your COM port when connection is unsuccessful. It is a nice board and the price is right!

I struggled with it a few times because you didn't come with any documentation, but I played around with it and I figured out what it was an old bootloader version of the chip. It works great for what I need it for!

Product does not allow uploads. AD says some computer driver needed but What? No mention of what or how to get it? I'll keep looking but so far DOA. Well I found that it missing the ISP bootloader. Easy fix, google it to see how to easily add the boot loader. Once loaded unit functions well.