tack:
What I meant is that you can find some of these modules on eBay where they have been modified with the series cap on the correct line. Those ones will do the auto reset of the ATMega without the need to add the series cap on the board itself.
I am not aware of a USB to TTL module - on eBay at least - which has been modified especially to incorporate a series capacitor for use only with breadboarded ATMegas, making it non-standard as an RS-232 interface.
I understand some have now been made with the corrected wiring and a pinout to match the FTDI module which does not contain such a capacitor in order that they do suit the Pro Mini and other ready-made boards all of which have the capacitor on the MCU board itself.
Can you point me to an example of such?