External temperature and humidity measuring apparatus mobile sensor system and method for driving temperature and humidity measuring apparatus

摘要

The present invention relates to an external temperature and humidity measuring device which can be connected to an audio input / output port of a mobile host device, and has a first input terminal, a second input terminal, an output terminal and a ground terminal, Possible connectors; A relative humidity sensor connected in series between the first input terminal and the ground terminal for receiving a first AC signal from the mobile host device to generate a first output signal related to relative humidity information of the measurement subject area; And a temperature sensor unit connected in series between the second input terminal and the ground terminal and receiving a second AC signal from the mobile host device and generating a second output signal related to temperature information of the measurement subject region can do.;