ch340 usb ttl to pro mini DTR hack

ch340 usb not have DTR pin for programming pro mini. Simple hack
Connection:
CH340 ProMini
Vcc Vcc
Gnd Gnd
Rx Tx
Tx Rx
DTR DTR

My HiLetgo USB to TTL CH340 Module doesn’t have a DTR Pin.

sdingman:
My HiLetgo USB to TTL CH340 Module doesn’t have a DTR Pin.

That’s why the OP pictures show the wire soldered directly to pin 15 (DTR) of the CH340 chip.