Hi Ravi,
Please check this discussion recent one EM accessibility to carriers
If the client is scan the barcode at warehouse through SAP WM operation, then we have standard extractors available in SAP ECC Goods movement Business Process Types.
Check this link for SAP EM RF profile http://help.sap.com/saphelp_em70/helpdata/en/b5/cd503e50a9054be10000000a114084/content.htm?frameset=/en/3a/73593c21487103e10000000a11402f/frameset.htm¤t_toc=/en/f0/399903485e43c6bee92f0982a85b4e/plain.htm&node_id=45.
Regards
GGOPII