MyHumidity Controlled by BME280 and Photon

This week, a friend of mine occupied me quite a bit: it was about his rental apartment, in which he had for some time discovered moisture above the windows. Here the danger of mold formation lurks. Currently, he is diligently renovating and argues with his landlord about the cost. He had set up customary humidity sensors, which showed him the current value. He did not have a data series for several weeks. As far as the initial situation. A Particel Photon was quick to hand and sparked in my own network. But how should I get my small project for moisture measurement and reporting into its WiFi? How could I prepare it so far that he can access my equipment as comfortably as possible?”