Patent ID: 7961093

Claim:
A wireless sensor system comprising: at least one sensor coupled to a Radio Frequency Identification system comprising a transmitter and a receiver, wherein the transmitter includes a wireless module and the transmitter is configured to transmit an alarm signal, the alarm signal being transmitted by the transmitter when the output from the sensor is lower than a specific threshold, and wherein the receiver triggers an alarm when the alarm signal is received; a circuit coupled to the sensor and the wireless module, wherein the circuit is configured to set a threshold voltage; further comprising a humidity sensor coupled to the circuit and a negative feedback loop configured to provide linear voltage output of the circuit versus percentage of relative humidity; a demultiplexer configured to separate the signals received by the receiver from the transmitter and at least one comparator coupled to the alarm; and a storage system configured to store a sensing signal received from the sensor, wherein the storage system is coupled to the receiver.