RETAIL ENVIRONMENT MONITORING DEVICE POWERED BY AMBIENT ENERGY

A retail environment monitoring device includes an ambient environment sensor; a communications module; a rechargeable battery; a voltage sensor circuit; and an ambient energy harvester. The communications module receives data from the sensor. The battery is connected to the sensor and the communications module. The voltage sensor circuit monitors the charge level of the battery. The ambient energy harvester recharges the battery using ambient energy, such as artificial light.