With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
bsnTagRssiData
bsn Tag Rssi Data
1.3.6.1.4.1.14179.2.1.19.1.6
RSSI of the RF ID Tag as seen by the radio on this detecting AP.
Back to AIRESPACE-WIRELESS-MIB MIB page.
IPHost Network monitor allows you to monitor bsnTagRssiData on Cisco device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco switches right now.