I am doing a project using Arduino. The project is to measure temperature, humidity, altitude, and pressure in hiking trails. I know hot to do it. What I am asking your help for. I need a background about the project. Is there something like that in the market. what do hikers use nowadays to get temperature, humidity, altitude, and pressure? such as apps. I need about half to one page background. sources required. ...

1. I am doing a project using Arduino. The project is to measure
temperature, humidity, altitude, and pressure in hiking trails. I
know hot to do it. What I am asking your help for. I need a
background about the project. Is there something like that in the
market. what do hikers use nowadays to get temperature,
humidity, altitude, and pressure? such as apps. I need about half
to one page background. sources required.