12. Case 11: Feed at Fixed Time

12.1. Introduction


  • Feeding animals in manual is not convenient, we can make a device that could feed them at fixed time.

12.2. Function


  • Make the timing with RTC module and program to drive the servo for feeding at the fixed time.

12.4. Picture


../../_images/microbit-Smart-Agriculture-Kit-case-01-02.png

12.5. Hardware Connection


Connect the servo to P1, and the OLED to IIC on IoT:bit.

../../_images/microbit-Smart-Agriculture-Kit-case-11-03.png

12.6. Software Programming


Click “Advanced” in the MakeCode to see more choices.

../../_images/microbit-Smart-Agriculture-Kit-case-01-04.png

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.

../../_images/microbit-Smart-Agriculture-Kit-case-01-05.png

For programming, we need to add a package: click “Extensions” at the bottom of the MakeCode drawer and search with “neopixel” in the dialogue box to download it.

../../_images/microbit-Smart-Agriculture-Kit-case-01-06.png

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.

12.7. Program


Initialize the OLED display as 128×64m and the time settings of RTC module, set the sevo to drive to 0°.

../../_images/microbit-Smart-Agriculture-Kit-case-11-07.png

Display the current seconds on OLED screen.

../../_images/microbit-Smart-Agriculture-Kit-case-11-08.png

If the second is 1, set the servo to drive to 90°, pause 5000ms and then set the servo to drive to 0°.

../../_images/microbit-Smart-Agriculture-Kit-case-11-09.png

Link: https://makecode.microbit.org/_RE7cgtJCJMFP

12.8. Result


  • The device makes the feeding every 1 minute.