Extended BLE configuration for the rest of the user properties and added scale status notify

[icapurro]

This pull request enhances the firmware by adding more BLE configuration capabilities for the user-defined configurations. This enables configuration with the latest Companion App code.

Key Changes

1. EEPROM Refactoring:

   • Increased EEPROM_SIZE from 2 bytes to 9 bytes to store additional configuration parameters.
   • Added a SIGNATURE_ADDR (with value 0xAA) to detect if EEPROM has been initialized.
   • Expanded stored variables to include:
     • WEIGHT_ADDR: Goal weight (unchanged).
     • OFFSET_ADDR: Weight offset (unchanged).
     • New fields: MOMENTARY_ADDR, REEDSWITCH_ADDR, AUTOTARE_ADDR, MIN_SHOT_DURATION_S_ADDR, MAX_SHOT_DURATION_S_ADDR, DRIP_DELAY_S_ADDR.
   • Introduced loadOrInitEEPROM() to initialize EEPROM with defaults if uninitialized or load existing values.

2. Dynamic Configuration and Logic Updates:

   • Replaced hardcoded #define constants (e.g., MOMENTARY, REEDSWITCH, AUTOTARE, MIN_SHOT_DURATION_S, MAX_SHOT_DURATION_S, DRIP_DELAY_S) with runtime variables (momentary, reedSwitch, autoTare, minShotDurationS, maxShotDurationS, dripDelayS).
   • These variables are loaded from EEPROM at startup and can be updated via BLE, with changes persisted back to EEPROM.
   • Updated loop() and related functions to use these dynamic variables instead of static defines.

3. BLE Enhancements:

   • Added new BLE characteristics:
     • reedSwitchCharacteristic, momentaryCharacteristic, autoTareCharacteristic: Switch and tare settings.
     • minShotDurationSCharacteristic, maxShotDurationSCharacteristic, dripDelaySCharacteristic: Shot timing parameters.
     • firmwareVersionCharacteristic: Read-only firmware version.
     • scaleStatusCharacteristic: Notifies scale connection status (STATUS_DISCONNECTED or STATUS_CONNECTED).
   • Implemented initializeBLE() to set up services and characteristics with initial values.
   • Added pollAndReadBLE() to handle runtime updates from BLE writes, persisting changes to EEPROM.

4. Scale Connection Logic:

   • Replaced the blocking while(!scale.isConnected()) loop with an if(!scale.isConnected()) condition in loop().
   • This change ensures the Arduino main loop continues running, allowing:
     • Periodic scale connection attempts without blocking.
     • Bluetooth configuration updates (via pollAndReadBLE()) to execute after every connection attempt, even when the scale is disconnected.
   • Added updateScaleStatus() to track and notify scale connection state changes.

IMPORTANT: I have tested this with the ESP-WROOM-32 board, which is similar to the shotStopper board, but not the same.