Hi,I wanted to know if I can upload my skecht through a proto shield (via port TX and RX?) without using the usb plug?I am already powering my board with the 5V and gnd, the board works.Then I tryied to connect the TX and RX pins of my board directly to the usb cable but it didn't work.So, how can I upload programs without using the usb plug, and possibly through a shield?I am asking because I have built a casing that includes interfacing (with my kind of plugs) and it's own "wall" usb plug. the arduino board is inside the boxThanks for your answers
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