Archived:Receiving certain WLAN notifications automatically does not work (Known Issue)
APIs are defined in the SDK to asynchronously receive notifications about the status of a WLAN connection (see Connection Monitor API).
However, not all notifications are received as described in the SDK documentation. The events EConnMonBearerAvailabilityChange and EConnMonSignalStrengthChange are documented to be received asynchronously through MConnectionMonitorObserver::EventL().
Since constantly monitoring bearer availability and signal strength consumes a lot of battery power, automatic notifications for these events are not enabled in S60 3rd Edition devices. EConnMonBearerAvailabilityChange event can be used for detecting changes in WLAN availability if WLAN background scans are enabled in the device settings. These events may not arrive immediately after the change, since they are restricted by the scanning interval defined in the settings.EConnMonSignalStrengthChange event is valid only for cellular (GPRS, WCDMA, etc.) bearers.
If this functionality is needed, applications have to implement their own logic for periodic, synchronous queries for signal strength and/or bearer availability in order to detect any immediate changes.