Sleep modes

A number of low-power modes exist to enable devices to operate for extended periods of time on battery power. Use SM (Sleep Mode) to enable these sleep modes. The sleep modes are characterized as either:

• Asynchronous (SM = 1, 4, 5, 6).
• Synchronous (SM = 7, 8).

In Synchronous sleep networks, a device functions in one of three roles:

1. A sleep coordinator.
2. A potential coordinator.
3. A non-coordinator.

The difference between a potential coordinator and a non-coordinator is that a non-coordinator node has its SO (Sleep Options) parameter set so that it will not participate in coordinator nomination and election and cannot ever be a sleep coordinator.

Note Synchronous and asynchronous sleep modes are incompatible. Synchronous and asynchronous sleep nodes should not be configured in the same network. Asynchronous sleep does not apply in a mesh network. It can only operate over one hop where a designated node holds messages for the sleeping node.