I am using snmp to pull the health voltage and create a chart. The value coming from the snmpget is always the same (I know the supply volts are not constant during the day, its a solar/lithium supply), until I open winbox and look at the System Health tab. Then the snmp value suddenly becomes dynamic and correct updating values to the chart. When I close winbox, it goes static again. This is on a wAP R ac with v7.1b3 and v7.1b4. The mib for health volts in my case is .220.127.116.11.4.1.14918.104.22.168.22.214.171.124.