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by javamaks
Sun Jul 27, 2025 9:22 pm
Forum: General Discussion
Topic: ESP32 convert logic level RS232 with MAX3232 and ICT billacceptor
Replies: 1
Views: 315

ESP32 convert logic level RS232 with MAX3232 and ICT billacceptor

Hi everyone,

I’m working on connecting an ICT L83 (RS232 version) bill acceptor to my ESP32 DevKit V1 using a MAX3232 for RS232 to TTL level conversion.

Setup:

ESP32 3.3V logic

MAX3232CSE with 0.1uF ceramic capacitors (100V rated)

ICT L83 bill acceptor via DB9 cable (using TX, RX, GND only ...

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