The document discusses Bluetooth communication interrupts that may occur with a tablet device. There are three types of interrupts: (1) when one product is placed, (2) when two products are placed for comparison, and (3) when all products are removed. The interrupt message includes the interrupt type (1-3), model ID of the left product, and model ID of the right product. Depending on the interrupt type, one or both model IDs may be null. The communication between the Bluetooth hardware and tablet can use the Serial Port Profile.

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Bluetooth Communication
1. Bluetooth Interrupts
A. Interrupt 1
B. Interrupt 2
C. Interrupt 3
2. Format
3. Communication

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Bluetooth Interrupts
No Products
Time Out
Or
Interrupt 3
(Remaining product
removed)
Interrupt 1
(1 product is placed)
1 Product
Interrupt 1
(Either of the
product is removed)
Time Out
Or
Interrupt 3
(both products
removed)
Interrupt 2
(2nd product is
placed)
2 Products
The3 important fields that should be included in all interrupt messages are:
Interrupt type: This field indicates the type of interrupt. The possible values are 1,2 or 3.
Value of ‘1’ indicates that only one product is placed for information lookup. The single product
could be placed on either sides of the tablet. Interrupt type 1 will trigger screen 2 to be shown.
Value of ‘2’ indicates that two products are placed on sides of the tablet. Interrupt type 2 will trigger
screen 3 to be shown. Screen 3 is the product comparison screen. This implies that the product
comparison should be shown on the tablet screen.
Value of ‘3’ indicates that there are no products placed beside the tablet. This interrupt could occur
when an earlier placed product is removed. Interrupt type 3 will trigger screen 1 to be shown. This
implies that there is no product available for information lookup.
Model Id 1: The field will hold the product Id of the product which is placed on the left side of the
tablet.
Model Id 2: The field will hold the product Id of the product which is placed on the right side of the
tablet.

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Interrupt 1 (No products -> 1 product) – one product is placed on either of the stands
No
Product
Or
No
Product
The values for this case are:
Interrupt type: 1
Model Id 1: abcd123
Model Id 2: null
Or
Interrupt type: 1
Model Id 1: null
Model Id 2: abcd125
For interrupt type 1, either of the model id’s will always hold a null value.

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Interrupt 2 (1 product -> 2 products) – Two products are placed for comparison
The values for this case are:
Interrupt type: 2
Model Id 1: abcd123
Model Id 2: xyz987
Interrupt 3 (2 products or 1 product -> No product)
No
Product
The values for this case are:
Interrupt type: 3
Model Id 1: null
Model Id 2: null
No
Product

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Format
These 3 fields can be made available in any format needed. It could be XML or JSON or any other
preferred format.
Communication
For establishing communication between the Bluetooth hardware and the tablet, consider Serial
Port Profile (SPP).