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Raspberry Pi 5 GPIO Migration: Moving from RPi.GPIO to lgpio for Python Scripts

  If you have recently attempted to migrate your legacy Python automation scripts to a Raspberry Pi 5, you have likely encountered the immediate, script-breaking failure of   RPi.GPIO . The standard error— RuntimeError: This module can only be run on a Raspberry Pi! —is misleading. You   are   on a Raspberry Pi, but the underlying hardware architecture has shifted fundamentally, rendering direct memory access libraries obsolete. This guide details the architectural root cause of this failure and provides a production-grade implementation using the  lgpio  library to restore GPIO functionality on Raspberry Pi 5 running Raspberry Pi OS (Bookworm). The Root Cause: The RP1 Southbridge The failure of  RPi.GPIO  on the Raspberry Pi 5 is not a software bug; it is an architectural incompatibility. On Raspberry Pi generations 1 through 4, the GPIO pins were directly controlled by the main Broadcom SoC (e.g., BCM2835, BCM2711). Libraries like  RPi.GPIO...