keyboard to uno

hello,
new to this , so pls go slowly.
i want to connect a palm 5 portable keyboard (model 3c10439 )
to my uno. the keyboard has a serial , not usb, connection and draws +3.3v.
eventually, i want to build a morse code encoder using the keyboard.
below is the link to the cable pinouts.
any suggestions appreciated.

Thanks

http://pinouts.ru/PortableDevices/palm_iii_pinout.shtml

Assuming it's async serial I'd start by connecting 3.3V, Gnd, RX to RX and TX to TX. Jumper Reset to Ground so you can use the Arduino as a USB-to-Serial converter. Try Serial Monitor at various baud rates to se if you can get ascii characters from the keyboard. Report back when you have determined the correct baud rate.

Thank you kindly,

Yes, it is a synch serial.
Pls explain jumper reset to gnd.
I would assume that using + 5 v is not a concern. ( + 3.3v in specs)

ST

Pls explain jumper reset to gnd.

A jumper between Reser and Gnd will force the processor into reset and prevent it from doing anything. This leaves the RX and TX pins free to connect the USB-to-Serial hardware to your serial device.

I would assume that using + 5 v is not a concern. ( + 3.3v in specs)

A 5V TTL serial device like the USB-to-Serial hardware will work with an incomming 3.3V TTL serial signal. I have no idea if the outgoing 5V signal from the USB-to-Serial hardware will damage the keyboard. Might be best to leave the RX side unconnected for safety. No way of knowing if you need to be able to send anything to the keyboard.

Thanks, Johnwasser,
I think I've got it. I don't have to send any signals to the keyboard.
Now I understand everything you've said, but here it comes...stupid question .

Jumper to reset. I know about the reset button , but is there a socket to connect to it?
Remember, I'm new at this .

So far ...
Connect power to power
Don't connect tx to rx on keyboard
Jumper reset to ground

....and be on the lookout for smoke. LOL.

smdtech:
Jumper to reset. I know about the reset button , but is there a socket to connect to it?
Remember, I'm new at this .

There is a Reset pin right next to the 3.3V pin.

I'm surprised you did not notice it when you connected the power pin of the keyboard to the 3.3V pin.

found it, mind you, i have to see the pins on the uno w a magnifying glass.
at my age , i shouldnt be puttering around w these micro boards. :astonished:
anyway ,wish me luck, and thank you again for your help.

ST