A method performed by a low-power node (LPN) in a wireless mesh network, wherein the LPN comprises a main receiver and a wakeup receiver, and wherein the method comprises: performing the following first operations in response to an event trigger: activating the wakeup receiver while maintaining the main receiver in an inactive state, and sending a polling message to a second node in the wireless mesh network; for a predetermined duration, determining whether a wakeup signal has been received from the second node via the wakeup receiver; and performing a plurality of second operations based on determining that the wakeup signal has been received, the second operations including: activating the main receiver, and receiving, from the second node via the main receiver, a response to the polling message.