Have you been able to solve this problem? I'm having the exact same problem and cant find a solution?

DanMars wrote: ↑

Sat Mar 30, 2019 8:23 pm

Thank you for your help. I will look into those options.
Dan

Did you find a solution for this? The Datasheet of the MAX3232 Chip says:

Accepts 5-V logic input with 3.3-V supply

so I guess 12v logic from the RS232 Device is not acceptable...