Scan Filter Settings
Configure how the RFID scanner filters tags during an inventory count, including hardware vs software filtering, presets, and EPC mask rules.
The Scanner Filters dialog lets you control which RFID tags the scanner accepts during an inventory count. Filters reduce noise from unrelated tags — for example, filtering out packaging-level tags so only individual POS items are counted — and can operate either directly on the scanner hardware or in software after the tags are read.
Scanner filters apply to RFID scanning only. Barcode scanning is not affected by these settings.
Opening scanner filters
- Open the count detail page.
- Tap the overflow menu (⋮) in the top-right corner.
- Tap RFID Filters (shown as RFID Filters (Active) when a filter is already configured).
- The Scanner Filters dialog opens.
Make your changes, then tap Apply to save them or Cancel to discard.
Hardware vs software filtering
The Use Hardware Filtering toggle at the top of the dialog controls where filtering happens.
| Setting | Behaviour |
|---|---|
| On (hardware filtering) | The scanner reads only tags that match the configured rules — unmatched tags are never reported to the app. Shown as Scanner will only read matching tags. |
| Off (software filtering) | The scanner reads all tags in range. The app then discards tags that do not match the rules. Shown as All tags read, filtered in software. |
Hardware filtering is more efficient in busy RFID environments because it reduces the volume of data sent to the app. Software filtering is useful when you want to keep a record of filtered tags (visible in the N filtered chip on the scan status bar).
The Company Prefix (GS1), SGTIN Filter Value, and EPC Masks fields are only editable when Use Hardware Filtering is on.
Presets
Tap a preset chip to apply a ready-made filter configuration. The selected preset chip is highlighted.
| Preset | What it does |
|---|---|
| None | Clears all filter rules and disables hardware filtering. All tags are accepted. |
| SGTIN Only | Enables hardware filtering with a single EPC mask (30 at bit offset 0, 8 bits) that matches only SGTIN-96 tags — the standard format used for individual retail items. |
Selecting a preset overwrites any custom values already in the dialog.
Company Prefix (GS1)
Enter your organisation's GS1 company prefix in the Company Prefix (GS1) field to restrict scanning to tags issued under that prefix.
- The prefix is a numeric string, for example
0123456. - The app converts the prefix into the correct EPC bit mask automatically, taking the partition value from the prefix length.
- Leave this field empty if you do not want to filter by company prefix.
SGTIN Filter Value
The SGTIN Filter Value dropdown filters tags by their GS1 packaging level. Select Any to accept all packaging levels, or choose a specific level:
| Value | Level |
|---|---|
| Any | No packaging-level filter |
| 0 — All | All packaging levels |
| 1 — POS Item | Individual retail item |
| 2 — Case | Case/carton |
| 3 — Reserved | — |
| 4 — Inner Pack | Inner pack |
| 5 — Reserved | — |
| 6 — Unit Load | Pallet or unit load |
| 7 — Component | Component part |
For most retail inventory counts, select 1 — POS Item to count only individual shelf items.
EPC Masks
The EPC Masks section lets you add one or more custom hex patterns that tags must match. Tap the section header to expand it.
When hardware filtering is enabled, multiple mask entries use OR logic — a tag is accepted if it matches any one of the configured masks.
Adding a mask entry
- Tap Add Mask Entry.
- A new entry row appears with four fields:
| Field | Description |
|---|---|
| Label (optional) | A human-readable name for this mask, for example SGTIN Header or Suffix filter |
| Mask (hex) | The hex pattern to match, for example 30 or 99979999 |
| Bit Offset | The bit position within the EPC where matching starts. 0 matches from the beginning of the EPC. |
| Bit Length | The number of bits to match. Leave empty to calculate automatically from the mask length (4 bits per hex character). |
- Fill in at least the Mask (hex) field. The label and bit length are optional.
- Repeat to add more masks if needed.
Removing a mask entry
Tap the × button on the right side of the mask entry row to remove it.
Bit offset guidance
For a 96-bit EPC, use a bit offset of 64 to match on the last 8 hex characters (the serial number suffix). The scanner automatically accounts for the 32-bit CRC+PC header.
The blue info box at the bottom of the dialog summarises the OR logic and bit offset tip whenever hardware filtering is on.
Applying and clearing filters
- Tap Apply to save the configuration. A confirmation message appears: Hardware filter applied (listing any active masks) when hardware filtering is on, or Software filtering only (hardware filter disabled) when it is off.
- Tap Cancel to close the dialog without saving any changes.
- To remove all filters, tap the None preset and then tap Apply.
The HW or SW badge on the scan status bar indicates the active filter mode while RFID scanning is running. Tap the N filtered chip to see which tags were rejected.