HP50g serial communication with 3rd party device

[Marakasmalan]

I also tried to use LF (10CHR) instead, no difference.

"All communication should be done at a rate of 115200 bps with 8 data bits, 1 stop bit and no parity bits.
No flow control should be performed."

MY IOPAR variable is set to { 115200. 0. 0. 0. 1. 3. }

I also note the device RS232 instructions specify:

"RS-232 port and use the newer RS232 protocol V2.X. The new protocol, V2.X, is all ASCII based, with the goal of making it easier to use."

Will this protocol V2.X be compatible with the calculator?