The Watchman is connected to the room through "wires" called GPIO pins . One wire is a Digital Input connected to a door sensor.
The Watchman is incredibly disciplined. He doesn’t spend his time browsing the web or playing games like a "Desktop PC" manager would. Instead, he sits at a small desk with a set of very specific instructions (the Code ) and a tiny bit of scratchpad paper ( RAM ). He is designed to do one thing perfectly: keep that flower alive. Embedded systems: introduction to ARMВ® Cortex(T...
A third wire is a signal that controls a heater. He doesn't just turn the heater "on" or "off"; he "pulses" it rapidly to keep the temperature perfectly steady, like a dimmer switch. The Watchman is connected to the room through