USB-to-Serial Adapter Issues

I've just recently made my own Arduino Uno board, bought components, uploaded bootloader to atmega328p-au and verified correct bootloader. I purchased the USB2Serial Micro from the Arduino website and I tried uploading the blink sketch to my board and continue to get the error message:

avrdude: stk500_recv(): programmer is not responding
avrdude: stk500_getsync() attempt 10 of 10: not in sync: resp=0x06

I've tried the pushbutton reset and everything I could find on forums. To test the functionality of the adapter, I tried using it to program my actual Arduino Uno I bought from the Arduino website and this problem persists even with this board. I know the Uno works properly as I uploaded the blink sketch just fine traditionally (without the adapter) and it works fine and I can get the Board Info as well. Using the adapter on the Uno, I can no longer get the Board Info. I've got the correct COM port and board selected. To use the adapter, is there something else I need to change to make it work? (I do have the .inf file downloaded and get the correct device within device manager)

Any help would be great after sinking money into this!! Please Help!!

mahnked:
I've just recently made my own Arduino Uno board

You will have to post clear photos and schematics. You probably have a wiring error.

If you made a true Arduino UNO board it would have the USB-to-Serial on the board. My first suspicion would be that you left out the100nF Auto Reset capacitor or didn't connect it to the right pin on your external USB-to-Serial adapter. Do you have five wires? Power, Ground, RX, TX and DTR?

Attached is a schematic of how I am wired to the Uno. I have RX and TX going to pin 0 and 1 respectively. 5V and GND are doing to respective pins. And I do have the DTR and Reset wires correct with 100nF cap in line.

and I’m using this to eliminate the need for atmega16u2 and supporting circuitry to save board space on future custom builds while still using atmega328p-au and arduino ide

mahnked:
and I'm using this to eliminate the need for atmega16u2 and supporting circuitry to save board space on future custom builds while still using atmega328p-au and arduino ide

Then why not just use the ICSP?

mahnked:
I purchased the USB2Serial Micro from the Arduino website and...

Link, please.

Looking at your picture I think you have to swap the rx/tx lines, tx of usb adapter goes on rx on Arduino and rx go to tx.

Ciao, Ale.

Switching the TX and RX pins did not work. And thank you aarg as using the uno as isp programmer worked in loading a blink sketch to homemade board did work! And that will work for now!

I would still like to get the adapter working since that would be easier in the future.

mahnked:
I would still like to get the adapter working since that would be easier in the future.

Then please post clear photos of your actual hardware setup.

mahnked:
Switching the TX and RX pins did not work. And thank you aarg as using the uno as isp programmer worked in loading a blink sketch to homemade board did work! And that will work for now!

Good, that also proves that the processor is running.

mahnked:
Switching the TX and RX pins did not work. And thank you aarg as using the uno as isp programmer worked in loading a blink sketch to homemade board did work! And that will work for now!

I would still like to get the adapter working since that would be easier in the future.

When you were first setting up your processor, did you upload a sketch through the ICSP connector after you burned the bootloader? That overwrites the bootloader so that you have to burn a fresh bootloader if you want to do serial uploads. That could be your problem.