Unable to Upload Sketches to Arduino on Breadboard ATMega328P-PU Using a CP2102

CrossRoads, Thank you for the quick reply!

I didn't realize I could get them that cheap. Oh well, I guess I'm committed to giving this CP2102 one last try before I junk it and by a different module.

I added 0.1 uF caps to the VCC and AVCC pins as requested. I was still unable to upload the sketch.

Yes, the crystal has 22 pF caps on both legs of the crystal. I also switched out the crystal a while back to rule that out.

The picture is unclear, but there is a brown jumper wire going from the VCC pin of the CP2102 module to the power rail.


Is there a way to test the TX and RX communication via a multimeter, LED, or through my Arduino UNO?

What other factors could I rule out?


I've attached pictures this time. I'm not sure why they would not attach to my original post.