Are there any example codes for cc2640R2 using battery monitor feature? If not, how do I implement battery monitor feature in Simple Peripheral example(ble4.2 stack), could not find any reference to AON Battery Monitor in the library for the example, so how to include AON battery monitor to the project?The intended application is to make a beacon that send non-connectable advertisements with current battery level as part of the packet at a fixed interval.