Case 05: Water Temperature Detection
Introduction
- Fishes are poikilotherm whose body temperature changes as the ambient water temperature changes, thus, the water temperature plays a vital role in the growth of fishes.
Function
- Dectect the water temperature with the DS18B20 sensor and display them on OLED screen.
Products Link
Picture
Hardware Connection
Connect DS18B20 to P1 and the OLED to IIC on IoT:bit.
Software Programming
Click "Advanced" in the MakeCode to see more choices.
For programming, we need to add a package: click "Extensions" at the bottom of the MakeCode drawer and search with "iot-environment-kit" in the dialogue box to download it.
Notice: If you met a tip indicating that some codebases would be deleted due to incompatibility, you may continue as the tips say or create a new project in the menu.
Program
Initialize the OLED screen as 128×64.
Set DS18B20 sensor to connect to P1 and save the returned value as variable "Temp".
Clear the OLED screen and display the water temperature.
Link: https://makecode.microbit.org/_Jx2d4JgU6iWj
Result
- The OLED displays the water temperature and refreshes every 5 seconds.