// We now have the oldest node that we've heard from - ping it!
if (oldestNode != null) {
logger.debug("NODE {}: Sending periodic PING.", oldestNode.getNodeId());
// Reset the resend count - also resets the lastUpdate timer
oldestNode.resetResendCount();
ZWaveNoOperationCommandClass zwaveCommandClass = (ZWaveNoOperationCommandClass) oldestNode
.getCommandClass(CommandClass.NO_OPERATION);
if (zwaveCommandClass != null)
zController.sendData(zwaveCommandClass.getNoOperationMessage());