Open-source toolkit for integrating POS software with GHL/PAX payment terminals via RS232 serial. Implementations in C, Python, C#,Android and browser (Web Serial API). Full protocol docs, wiring guides, and debugging tools.
android python c csharp fintech pos pax rs232 ecr malaysia serial-communication payment-terminal ghl web-serial-api pos-integration
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Updated
Apr 30, 2026 - Python