I'm working on interfacing my arduino with an old iDen phone (running processing mobile). Currently, I just need to figure out the hardware, specifically using the MAX3232 to convert the phone's RS-232 to TTL for the arduino. My current idea of what this might look like is below, but I'm not sure what to do with the DSR/DTR/RE/DCD/CTS/RTS pins, or if I even need them. I also don't know if I need a null modem or not.
Anyone have any ideas?
Thanks,
normaldotcom
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