Firmware

This section describes the firmware, control logic, and (optionally) the build environment and programming process for the Ma Bell Gateway.

• Firmware Architecture: Outline the key software modules—Bluetooth control, ringer signaling, off-hook detection, audio handling, and system state machine.

• Configuration and Customization: Explain how to set system parameters (e.g., ring cadence, volume levels, paired devices), including any configuration files or menu-driven setup.

• Flashing and Updates: Provide step-by-step instructions for building and flashing the ESP32 firmware, including links to required toolchains or IDEs.

• Diagnostics and Logging: Document built-in logging, serial debug output, or any status LEDs/indicators to assist with troubleshooting.

Contents:

• Firmware Architecture
• State Management