Wilteq WILTEQArduino Self-Study
Week 9 · Integration & Task C

Session 44: Task C: plan and prove subsystems

Assessment120 minNo new lesson

Learning outcomes

  • Plan the vent controller with no pin or power conflicts
  • Prove the DHT11, LDR, LCD, servo and button subsystems separately
  • Record a staged integration log

Kit and components

  • Uno, DHT11, LDR and 10 kΩ resistor, I2C LCD, servo, separate 5 V supply, push button, breadboard
  • Multimeter and oscilloscope
  • Printed Task C brief and criteria grid

Pre-reading about 20 min

Students read these on their phones before class. They are listed on the student Before class page.

  1. Practical Task C: Greenhouse Vent Controller
  2. Lesson 12: Staged integration

Session plan

  1. 0:0010 min
    Discuss

    Briefing

  2. 0:1035 min
    Plan

    Plan check

    Check and initial each learner's criteria, IPO diagram, pin and power plan (A4/A5 reserved, servo supply) and BOM before wiring.

  3. 0:4565 min
    Build

    Prove each subsystem

    Learners test each subsystem with its own short sketch and log the date and result: DHT11 readings, LDR day and night, LCD text, servo at 0° and 90° with the pulse width measured, and button presses.

  4. 1:5010 min
    Wrap-up

    Log check

    Initial each log entry you have seen working.

Checkpoint: ready to move on?

Every learner has an initialled plan and logged proof of all five subsystems.

Extension for fast finishers

Begin merging two subsystems with millis() scheduling.

Catch-up path

Prioritise the servo and DHT11; the LDR and button can be proven at the start of S45.

Homework and practice

Draft the merged sketch structure as functions.

Facilitator notes

  • Initial log entries only when you have seen the subsystem working - criterion 2 is critical.
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