This application is a relative humidity measurement using the HIH4030 module. It works with the IOIO-Q board. The HIH4030 outputs an analogue voltage that is in the range of 0.958 to 4.065 V at the voltage. Higher than + 3.3V, which is equivalent to relative humidity of 80% RH to 100% RH, is higher than the analog input of the IOIO and IOIO-Q boards, but at a relative humidity of 75% RH. The pressure is +3. .268V. In normal rooms the relative humidity values are between 25 and 60% RH. HIH4030 and IOIO-Q are used, but they are available in relative humidity range of 0 to 75% RH and display relative humidity in Text View. Of this app.