I must say i am as new as they come to arduino. I have bought some of them for my 3d printer and cnc mill projects. But these basicly have theyr code and pinouts laid out for you. Nothing much to learn.
Well i was scrolling trough ebay for once, and found these gas sensors. Mq2-4 etc And i thought that could be a good utility to use with my multirotor. Sometimes it would be better to send in a uav to sense for hazardous materials.
My question then, wich sensors would i choose to get as broad a coverage as possible for gases and other materials. And is it even possible to hook say 3 or more sensors to one arduino?