So,I get this error when trying to upload a sketch to arduino nano.Solution I got is to click reset button on arduino when my TTL UART adapter blinks.Shouldn't it reset automaticaly? I have tx and rx of arduino connected to RXD and TXD of TTL UART adapter.Why doesn't it reset by itself?
Why do you use a adapter? A Nano has that on board...
And for reset with an external converter you need to connect the DTR line via a small capacitor to reset. The Pro Mini has this capacitor on board. (So has the Nano but only connected to the internal converter.)
septillion:
Why do you use a adapter? A Nano has that on board…And for reset with an external converter you need to connect the DTR line via a small capacitor to reset. The Pro Mini has this capacitor on board. (So has the Nano but only connected to the internal converter.)
A 0.1uf ceramic capacitor, to be specific. This converts the high-to-low transition of the DTR line when the serial port is opened into a brief low pulse on reset.
You cannot use an external adapter to get autoreset on a nano without cutting traces on the board, because the 0.1uf ceramic cap between the builtin serial adapter’s DTR line and reset will fight the external 0.1uf cap you put between the external serial adapter and reset.