not all Uart chips are the same.
many and vast chips can not do 115k buad.
why not read the spec on this old long ago non supported device.
or ask on real HP forum. this.>?>?>
RS232 was my bag for many years, could make any work.
Im sure this is in the manual , if I had a PC the book would be in my possession, at all times, why let luck rule here.
the luck of find books on old products.>??
168 page manual, i see, and no stinking index. wow.
gota love that. no?
rs232 . history, some apps set it others dont, for the who history of that. so if the APP dont that leave what, the OS, does it.
the manual stinks in this regard,
il now read your manual to you (google found it in 1sec)
IDENTIfying the Communications Port You can identify the virtual COM ports used to create a
serial port connection. You may need to identify these COM
ports for activities such as printing.
Use the inbound COM port when other devices initiate a serial
connection. Use the outbound COM port when you initiate a
serial connection to another device.
To identify the communications port:
1. From the Today screen, tap iPAQ Wireless > Bluetooth >
Settings > Services tab.
2. Under Services, tap Serial Port and tap the Advanced...
3. Note the names of your inbound and outbound COM ports.
4. Tap OK
(and no other hits in this manual this topic)
if you run and APP and the exit it and see the port baud wrong
you learned your APP is no good.
the spec page in this manual skips RS232 chip totally.
my guess is HP thinks its not needed.
one other hard thing to learn?
is RS232 is Not TTL 232,
RS232 real uses +12 and -12vdc levels, it bet your DEVICE unstated uses TTL232.. 5v TTL signalling.
RS-232 is for modems, and has lots more wires that just 3.
so if its 3 wire, (aka, 2wire Rx /Tx) its not ever called RS232
its and Ad hoc , 232. per the wiki on that...
why not use a real PC to do this
why not then use the USB-232 adaptor dongles sold for $3
use that to communicate, I can show you how to do all that.
using any PC running windows, and 1 extra USB port.
115k FIRST THE CHIP THERE MUST SUPPORT THIS.
THE OS IS NEXT... (the book skips all these details)
and the APP is last, the APP must support it and the OS
must let the APP, set it, (some dont, even when hardware CAN)
i could not even find a docucment on what are all the chips inside
this relic pocket, pc. nada, or id have shown the data sheet too.