connecting a USB to Serial TTL PL2303HX to Raspberry Pi

Question

I have a USB to Serial TTL PL2303HX (Prolific chipset) that I would like to connect to my Pi. My Pi model is 2011.12.

The USB to Serial adapter has 5 PINs labeled as follows:

3V3
TXD
RXD
GND
+5V

I received 4 cables with the USB to Serial Adapter (4 female-female dupont connectors).

I've seen various diagrams of the GPIO, but I'm not sure which PINS on the GPIO go to the PINs on the adapter.

Question: Which PINs on the GPIO need to be wired to which PINs on the USB adapter?

This is how I did it http://raspberrypi.stackexchange.com/a/1231/590 — John La Rooy, Oct 07 '13 at 03:30

score 6 · Accepted Answer · answered Oct 07 '13 at 03:33

6

You only need to connect GND, RXD, TXD

GND => PIN 6

RXD => PIN 8

TXD => PIN 10

answered Oct 07 '13 at 03:33

John La Rooy

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score 2 · Answer 2 · answered Nov 08 '13 at 10:13

2

In addition to John La Rooy's answer, I've also connected VCC (i.e., +5V) to PIN 2. Thus, my Pi receives enough power from my computer to boot from a USB key.

answered Nov 08 '13 at 10:13

user1448926

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Technically - Your Pi will only receive 500ma of power as per USB specification. Some motherboards allow short bursts of more power but it could reset the power and cause the Pi to reset. A nice idea but it can have long term problems. – Piotr Kula Nov 08 '13 at 10:20

score 1 · Answer 3 · answered Sep 25 '15 at 18:33

1

I can tell you the WRONG way. I did as above but also connected the 3v3 pin on the prolific dongle to the 3v3 pin on the pi and apparently it fried the pi. Not sure why. I wish someone would give an explanation.

answered Sep 25 '15 at 18:33

Jimbob

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You might bet better answers if you post this as a separate question. – bobstro Sep 25 '15 at 20:12
IF valid, I think this warning should be included in the accepted answer. – Daddy the Runner Jul 04 '17 at 11:02

connecting a USB to Serial TTL PL2303HX to Raspberry Pi

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