RFZ wrote:UART would be okay, but I prefer to not use it, because I program via UART and my design will have a USB 2 UART chip on it.
The ESP8266 has two UARTs: the second UART is actually designed for debugging and is on GPIO13 (RX) and GPIO15 (TX).
(except if you swap uarts, but then you still have only one with RX)
martinayotte wrote:there is no RX !
That's good to know, I didn't realize that upto now.
Nevertheless, he only needs an output, so that shouldn't be a problem.