During my freshman summer (2016), I worked at Center for Environmental Sensing and Modelling (CENSAM) in Singapore.
The project was using a swarm of robots moving along the surface of the water to dynamically collect water quality data which could be used to develop a model of the currents beneath the surface.
This project had many parts, and I was involved in finding sensors to add to the buoy. At the time, the robots had temperature sensors, and only two had pH sensors. I found low cost sensors for salinity and wind speed that could be integrated into the robots. Towards the end of my time there, I began integrating the new sensors with a Raspberry Pi.