Arduino sensor to my quadcopter

Iโ€™m a spanish student and Iโ€™m trying to build my own quadcopter. I thought about using mq-7, an arduino sensor which you can control the carbon monoxid in the air, but I donโ€™t know if I can do it with my PX4 pixhawk clone (hk pilot 32). I read in the internet that I can connect it in the I2C input, but Iโ€™m not sure if I can. Could someone help me to solve my problem? :slight_smile: :slight_smile: :slight_smile: :slight_smile: