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> Serial Port For Nokia770?, Serial Port for Nokia770?
post Mar 1 2006, 06:20 PM
Post #1

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Any one knows how to add a serial port to the Nokia770. I am trying to debug the device and it is very hard with out any output.

I have noticed an 11 pins conector (pad) in the battery compartment of the device, is their any chance that some of those pins are for serial port?
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post Mar 14 2006, 09:15 AM
Post #2

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Here's what I've found via experimentation.


Pin 9 is RxD (Nokia receive input) and pin A is TxD (Nokia transmit output). These are the third and second pins from the right towards the battery, respectively.

I used the metal shield as a ground. The outputs are evidently 3.3v - I used a USB-mobile phone cable as described in http://www.nslu2-linux.org/wiki/HowTo/AddASerialPort and http://www.i-hacked.com/content/view/66/47/ to connect to the device.

I enabled the R&D mode and set the serial console flag and connected via 8N1,115200.

I don't know of a suitable connector - I used a couple of stiff wires held in place with electrical tape.
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