Using Arduino Uno as a USB-TTL serial link to Casio FX-850P ?

[Dan C]

(07-21-2022 03:09 PM)Liam Hays Wrote:  What file transfer protocol does the 850P use? XModem?

I found this after some googling:

The Serial Interface is asynchronous full-duplex that is configured as a set of parameters either on the “command line” of the calculator or in code that is executed at run time.

Parity : Even
Data bits : 8 bits
Stop bit : 1 bit
CS : not used
DS : not used
CD : not used
Busy : XON/XOFF
Code : SI/SO not used

Baud Rate: 150, 300, 600, 1200, 2400, 4800