Display Flexible UI Pages

Command 0x1830 - Display Flexible UI Pages (Display Only)

This command allows the host to bring up standalone pages. A page is considered standalone if it’s stateless, meaning it will be:

• Shown on the display.

• Can allow user input.

• Returns user input result to the host.

• Operation ends.

Table – Request Data for Command 0x1831

Tag	Len	Value / Description	Typ	Req	Default
1830 = Command 0x1830 - Display Flexible UI Pages (Display Only)
81	01	Display Time 0x00 – Infinite. Device leaves the requested page on the display until the host initiates a change.	B	R
82	01	UI page option 0x00 – Enter Sale Amount page. Device responds with Notification 0x1803 - User Interface Host Action Request with ‘Touchscreen, $Amount button selected’ content.	B	R

Table - Request Example – (Display Enter Sale Amount Page)

Example (Hex)
AA 00 81 04 01 2C 18 31 84 08 18 31 81 01 00 82 01 00

Table - Response Example

Example (Hex)
AA 00 81 04 82 2C 18 31 82 04 00 00 00 00

A diagram of a device Description automatically generated

A screenshot of a diagram Description automatically generated

Sequence for Flexible UI Gen. 2 mode

The host sends the 0x1830 command with UI Page Option set to 0x06 (Flexible UI Gen. 2 page), which displays a bitmap. The device sends User Event Notifications for each tap on the touchscreen (requires signed image).

The host uses this command to display Flexible UI pages in the following layout: