[ADD] Barcode: Add documentation around retrieving EPC codes

closes #15483

X-original-commit: bcf98ab
Signed-off-by: Erin Jerison (erjer) <erjer@odoo.com>

Author: erjer-odoo

content/applications/inventory_and_mrp/barcode/operations.rst

@@ -16,3 +16,4 @@ Daily operations
    operations/gs1_nomenclature
    operations/gs1_usage
    operations/scan_rfid
+   operations/retrieve_epcs

content/applications/inventory_and_mrp/barcode/operations/retrieve_epcs.rst

@@ -0,0 +1,52 @@
+==================
+Retrieve EPC codes
+==================
+
+.. |EPC| replace:: :abbr:`EPC (electronic product code)`
+.. |RFID| replace:: :abbr:`RFID (radio frequency identification)`
+.. |GS1| replace:: :abbr:`GS1 (Global Standards 1)`
+
+Electronic product codes (|EPC|) are globally unique identifiers assigned to specific products,
+allowing items to be distinguished at the individual level. These identifiers support accurate
+inventory management by enabling faster cycle counts, streamlined adjustments, and more precise
+stock control.
+
+After EPCs are :ref:`obtained <barcode/operations/retrieve_epcs_gs1>` from |GS1|, they are
+:ref:`encoded <barcode/operations/write_epcs>` onto |RFID| tags, which are then applied to products
+and used throughout the inventory process.
+
+.. seealso::
+    Set up :doc:`../setup/rfid`
+
+.. important::
+    If using Odoo 18, |GS1|'s Encoder/Decoder tool **must** be used to retrieve EPCs.
+
+.. _barcode/operations/retrieve_epcs_gs1:
+
+Retrieving EPCs from GS1
+========================
+
+To retrieve an EPC to encode on a tag, use `GS1's EPC Encoder/Decoder tool
+<https://www.gs1.org/services/epc-encoderdecoder>`__.
+
+#. Enter the GTIN-14 barcode of the product in the application identifier :guilabel:`(01)` field.
+#. Enter the product's serial number in the :guilabel:`(21)` field.
+#. Specify a company prefix length.
+#. Specify the size of the tag and its filter value.
+
+.. image:: retrieve_epcs/retrieve-from-gs1.png
+   :alt: Complete the fields of the EPC Encoder/Decoder tool.
+
+.. _barcode/operations/write_epcs:
+
+Writing EPCs to RFID tags
+=========================
+
+After retrieving the EPCs, you can use an RFID writer to write the EPCs onto RFID tags. The process
+to write EPCs varies by RFID writer manufacturer. Refer to the RFID writer's documentation for more
+information.
+
+.. seealso::
+    - :doc:`gs1_nomenclature`
+    - :doc:`gs1_usage`
+    - :doc:`adjustments`