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Re: DIY Fail!
Using the same devices as OP, mine does work from RX-TX/TX-RX. I'm sure that RX-RX/TX-TX wouldn't work on this one. I'm sorted
Re: DIY Fail!
Wait so you said that you swapped RX/TX but it seems you have connected the RX from the Arduino to the RX of the USB-UART (i.e RX-RX and TX-TX? The instructions seem to say that you must connect RX-TX and TX-RX. Did you try 'crossing' like that? It seems I'm looking at getting the same two component...