After flashing the firmware, the device will have the name "DISP".

The user will set the ID for the device then the device will change the name to "DISP-ID".

ESP32 will filter the device have the name "DISP" and get the ID from device name: "DISP-ID".

The device will have 3 CASE to broadcast the advertising service:

• CASE 1. Broadcast without custom service.
• CASE 2. Broadcast with Device Setting custom service.
• CASE 3. Broadcast with Miscellaneous custom service.

1. CASE 1:

• The device is in the idle state, broadcast without custom service.
• The device power up will be in CASE 1.

2. CASE 2:

• For setting identification, mode.
• Enter to CASE 2 by pressing hall sensor for more than 5 seconds.
• Connect phone to set the IDENFICATION_SET and MODE_SET.
• IDENFICATION_SET: Format is 4 Byte Unsigned Int Little Endian.
• MODE_SET: Format is 1 Byte Unsigned Int Little Endian.
• When the device is disconnected to phone, device will go to "CASE 1".

3. CASE 3:

• The device will change to CASE 3 when the click count (hall sensor) is equal to mode setting value.
• The device will change to CASE 3 when the button is press more than 5 seconds (bottle available).
• The ESP32 will connect and get the value from device.
• ESP32 will read out the MODE_SELECTED, CLICK_COUNT, BOTTLE_REPLACEMENT.
• Device will reset CLICK_COUNT, BOTTLE_REPLACEMENT to 0 after read succeed.
• ESP32 disconnects with the device, the device will go to the "CASE 1".

• The LED should be off in CASE 1.
• The LED should be BLINK one time when click happen (hall sensor) (for troubleshooting).
• The LED should be double BLINK twice when bottle available.
• The LED should be triple BLINK twice when go to CASE 2

• IDENFICATION_SET (0XFFF1)
• MODE_SET (0XFFF2)

• IDENFICATION (0XFFF4) (Backup)
• MODE_SELECTED (0XFFF5)
• CLICK_COUNT (0XFFF6)
• BOTTLE_REPLACEMENT (0XFFF7)

There will be 4 operational modes - default mode 1

• Mode 1. Advertising Miscellaneous service after the 1th click
• Mode 2. Advertising Miscellaneous service after the 5th click
• Mode 3. Advertising Miscellaneous service after the 10th click
• Mode 4. Advertising Miscellaneous service after the 20th click