Hi Bob,

Thanks for that advice. I had started to think that I was going to try that as I'd seen a number of photos of the CP2102 with the RX and TX pins jumpered together and I read this PDF file too.

http://www.mods-ham.com/03_Home-brew/Homebrew-Mods/USB-Programmier-Interface...

I should have the various bits and pieces here by the weekend if the Ebay traders do their stuff and I'll give it a go.

73

Mark

Mark Lewis GW7KDU

On 30 Sep 2014, at 01:03, Bob Fk vk2byf@gmail.com wrote:

Yes you need a ground reference connection. Join the Data TX and RX together onto the data pin and it works.

I made my own cable for the VX-5 and it works.

Regards Bob VK2BYF

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Today's Topics:

1. Re: Homebrew cable for Baofeng UV-5R/Yaesu VX-7R based on CP2102 UART (YT9TP Pedja)

---------- Forwarded message ---------- From: YT9TP Pedja yt9tp@uzice.net To: Discussion of CHIRP chirp_users@intrepid.danplanet.com Cc: Date: Sun, 28 Sep 2014 21:08:24 +0200 Subject: Re: [chirp_users] Homebrew cable for Baofeng UV-5R/Yaesu VX-7R based on CP2102 UART

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On 28.9.2014 13:16, Mark Lewis GW7KDU wrote: I found this pin out for the VX-7R http://www.kc8unj.com/pinout.jpg This seems to be similar to the Baofeng UV-3R (as shown on the Miklor page) but is a Ground connection required?

It seems like VX-7R uses one pin for data and it is bidirectional. If that is the case then you should add some more components to convert bidirectional single pin to standard RX/TX serial connection.

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