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Topic: ch340 usb ttl to pro mini DTR hack (Read 3005 times) previous topic - next topic

ErtugrulBolat

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

sdingman

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

Riva

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.
Don't PM me for help as I will ignore it.

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