Patent ID: 8837341

Claim:
A low-power-consumption wireless sensor network system, comprising: a plurality of nodes, wherein the nodes can be enforced to enter a sleep state at a preset times and enter an awake state by a first light, and wherein a node comprises: a light-sensing device, sensing the luminance of the first light to generate an analog signal; a transmission device, coupled to the light-sensing device to perform data transmission with the nodes through a radio-frequency signal; an analog-comparison device, comparing the analog signal with a threshold value; and a micro-processing device, generating a corresponding operation according to the analog signal or the radio-frequent signal, wherein after the system is initialized, the micro-processing device and the transmission device are in a sleep state, and wherein if the luminance of the first light exceeds the threshold value set in the analog-comparison device, the analog-comparison device converts the analog signal to a digital signal and wakes up the micro-processing device and the transmission device to perform the corresponding operation.