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Uk Fon+ Looking For Serial Cable


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Looked at Digininja's guide what with also being from the UK but unfortunately Ebay don't seem to sell the cable he suggested anymore :(

I'm no electrician so not sure what I'm looking for.

I could head to Maplin for a cable but could someone say what I should be looking for or asking for when in store?

Also, what high gain antenna can you stick on these things?

And what sort of bits do you need to stick a battery supply onto it?

Had my Fon for months just stuck in the draw as when I saw how complicated it was with the 0.0.0.0 issue I put it on hold. (mainly due to not understanding the electronics side of it)

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I've ordered the Nokia cable. No doubt I'll be back asking for help regarding the wiring :)

I may write a guide as I do it for super noobs like me who haven't a clue about electronics.

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Check out my older post if you need drivers for your cable:

http://www.hak5.org/forums/index.php?showtopic=15672

Disassemble the phone plug and use this pinout to find which wires inside your cable are TX, RX and ground (ground is usually the cable's shielding)

http://pinouts.ru/CellularPhones-Nokia/nok...op_pinout.shtml

If you have the la fonera 2100, connect the wires according to this: http://www.dd-wrt.com/wiki/index.php/LaFon...rial-Cable-Port

otherwise, you'll have to find what are the correct pins for your model.

Info about the rest of the flashing procedure is all over the net so just look it up.

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If you have problems I still have a couple of spares for sale if you need one

What, the cables for the serial cable part you recommended on your site?

I may take you up on that offer if I run into issues with this Nokia one :)

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I'm selling made up cables for £20. If things go wrong and you want one PM me and I'll see what I've got in.

Will keep that in mind thanks.

How do you know what USB cable to use? I have found an old Logitech IO Personal Digital Pen I no longer want so am binning it. However the cradle for it is USB. How would I find out if I could use this as a serial cable?

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It has to be one that has a 5v to 3.3v converter. They have a special name but I can't remember it.

Vague rule of thumb, if it is a normal looking cable then probably not, if it has a lump on the PC end that could contain chips then it might be.

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It has to be one that has a 5v to 3.3v converter. They have a special name but I can't remember it.

Vague rule of thumb, if it is a normal looking cable then probably not, if it has a lump on the PC end that could contain chips then it might be.

Does have the big lump on the PC end and the USB plug has an adapter port on it I assume to add power to it if it's under powered?

The other end I've opened up and it said

Rating

5.3v = 350mA

inside it looks like this

dscf1231oy.jpg

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I'd guess it won't work.

The lump drops the voltage from 5v to 3.3v, if your thing is running at 5.3v the it will just blow the Fon.

Its a serial TTL cable you need, thanks Psychosis. Just google that term and you'll get loads of hits.

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I'd guess it won't work.

The lump drops the voltage from 5v to 3.3v, if your thing is running at 5.3v the it will just blow the Fon.

Its a serial TTL cable you need, thanks Psychosis. Just google that term and you'll get loads of hits.

Thanks. Well I'll save the cable in case it's useful for something else maybe.

So would this work straight off without having to do any wiring? (although maybe I should do the wiring so I can learn)

http://cgi.ebay.co.uk/USB-to-TTL-Serial-Ca...336ab36ffc0d718

Sorry for all the questions.

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Best ask an expert, there has to be one around here somewhere!

From reading this line

The serial data is at standard 5v TTL levels

I'd say not even though it talks about 3.3v.

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I still recommend using the nokia cable, but as a side note, it is possible to safely bring down 5V serial to 3.3V with just one transistor and two resistors like this: http://forums.overclockers.com.au/showthread.php?t=783133 (the picture shows 3.3V to 5V conversion, but the other way around is also explained)

I used it recently to connect a microcontroller to the fonera, as I didn't want to risk connecting 5V directly.

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  • 2 weeks later...
I still recommend using the nokia cable, but as a side note, it is possible to safely bring down 5V serial to 3.3V with just one transistor and two resistors like this: http://forums.overclockers.com.au/showthread.php?t=783133 (the picture shows 3.3V to 5V conversion, but the other way around is also explained)

I used it recently to connect a microcontroller to the fonera, as I didn't want to risk connecting 5V directly.

Nokia cable has finally turned up. Do you have a guide for cabling it up for the Fon+? I assume I start by chopping off the end that connects to the phone? :)

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  • 3 weeks later...

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