A method for wireless power transmission is performed at a wireless power transmitter. The method includes: (i) requesting sensor data from a receiver device; (ii) receiving sensor data from the receiver device in response to the request, wherein the sensor data is generated by one or more sensors of the receiver device; and (iii) determining whether the receiver device is in a proscribed state for wireless power reception based on the received sensor data. The method further includes, in accordance with determining that the receiver device is not in the proscribed state: transmitting, by antennas of the wireless power transmitter, a plurality of wireless power transmission waves to the receiver device so that each wireless power transmission wave of the plurality of wireless power transmission waves constructively interferes with at least one other wireless power transmission wave of the plurality of wireless power transmission waves.