Water Temperature Monitoring in my Ford Fiesta

Back in the sands of time, I owned an Alfa Romeo 159. Beautiful car, but it overheated on the day I bought it. The dealer that sold it to me was not interested in helping me get that resolved, and so it was down to me, a young guy with no money to get it sorted out and back on the road. Since then, I've watched every water temperature gauge in every car I've ever driven like a hawk! But in the Fiesta, a basic model of car, there is no water temperature gauge fitted as standard. The Fiesta's clocks, with no temperature gauge Initial Approach In a previous job, I was tasked with connecting to a vehicle's CAN bus system from an Android application in order to retrieve data from the vehicle. And it was this idea that I wanted to implement for myself. I had a suspicion that a water temperature sensor was available to me, even if there was no gauge, as the Fiesta is equipped with an 'overheat' warning lamp. The car must somehow know to trigger that warning. I bought an ELM327 Bluetooth dongl