Your updated code integrates various functionalities for a smart thermostat system using an Arduino board with WiFi capabilities. It reads temperature and humidity, displays these on an LCD, communicates with a Nest thermostat for adjustments, and handles motion detection as a trigger for actions.
Considerations and Suggestions
[ ] 1. Global Variable Access:
The checkSensors() function uses buttonState and motionDetected without passing them as arguments. Ensure these variables are declared globally (as you have done) so that they are accessible within checkSensors() and any other function that requires their status.
[ ] 2. Cooldown Logic for Motion Detection:
You've implemented a cooldown mechanism for motion detection, which is excellent for avoiding constant re-triggering. Ensure that the lastMotionTime variable is updated correctly when motion is detected and that your system respects this cooldown period before responding to new motion events.
[ ] 3. Temperature Reading and Action Interval:
The tempActions() function checks if a significant amount of time (defined by tempReadInterval) has passed before reading temperature again. This is an efficient way to limit the frequency of temperature readings and actions, thus saving power and reducing unnecessary communications with the Nest server.
[ ] 4. Adjusting Thermostat Logic:
Your adjustNestThermostat() function smartly checks the current temperature against a desired threshold before deciding to heat or cool. This decision-making process helps maintain a comfortable environment while potentially saving energy by minimizing unnecessary adjustments.
[ ] 5. Error Handling and Feedback:
Consider adding more detailed error handling and feedback, especially for WiFi connectivity issues and unsuccessful attempts to communicate with the Nest server. Clear feedback can aid in troubleshooting and ensure users are aware of any system malfunctions.
[ ] 6. Repeated Code for Connection Status:
Both getNest() and postNest() include logic for connecting to the Nest server and handling responses. Consider refactoring this into a reusable function to reduce code duplication and simplify maintenance.
[ ] 7. Modularization:
Your code is well-organized into functions, each handling a distinct aspect of the system's functionality. Continue this practice as your project grows, keeping functions focused on a single responsibility.
[ ] 8. Documentation and Comments:
Your comments help explain the purpose and functionality of each section. Maintaining this level of documentation is crucial, especially as the complexity of your project increases.
Code Improvement Example
For improving the thermostat adjustment logic and ensuring it only runs when necessary, consider enhancing the feedback within adjustNestThermostat(). If the temperature is within the desired range, you already log a message to the serial. You could extend this to handle cases where an adjustment is made, indicating whether the system is heating or cooling:
if (abs(currentTempF - desiredTempF) > threshold) {
String mode = currentTempF < desiredTempF ? "heat" : "cool";
Serial.println("Adjusting thermostat to " + mode + " mode.");
setThermostat(mode);
} else {
Serial.println("Temperature is within the desired range. No action needed.");
}
Your updated code integrates various functionalities for a smart thermostat system using an Arduino board with WiFi capabilities. It reads temperature and humidity, displays these on an LCD, communicates with a Nest thermostat for adjustments, and handles motion detection as a trigger for actions.
Considerations and Suggestions
[ ] 1. Global Variable Access:
checkSensors()function usesbuttonStateandmotionDetectedwithout passing them as arguments. Ensure these variables are declared globally (as you have done) so that they are accessible withincheckSensors()and any other function that requires their status.[ ] 2. Cooldown Logic for Motion Detection:
lastMotionTimevariable is updated correctly when motion is detected and that your system respects this cooldown period before responding to new motion events.[ ] 3. Temperature Reading and Action Interval:
tempActions()function checks if a significant amount of time (defined bytempReadInterval) has passed before reading temperature again. This is an efficient way to limit the frequency of temperature readings and actions, thus saving power and reducing unnecessary communications with the Nest server.[ ] 4. Adjusting Thermostat Logic:
adjustNestThermostat()function smartly checks the current temperature against a desired threshold before deciding to heat or cool. This decision-making process helps maintain a comfortable environment while potentially saving energy by minimizing unnecessary adjustments.[ ] 5. Error Handling and Feedback:
[ ] 6. Repeated Code for Connection Status:
getNest()andpostNest()include logic for connecting to the Nest server and handling responses. Consider refactoring this into a reusable function to reduce code duplication and simplify maintenance.[ ] 7. Modularization:
[ ] 8. Documentation and Comments:
Code Improvement Example
For improving the thermostat adjustment logic and ensuring it only runs when necessary, consider enhancing the feedback within
adjustNestThermostat(). If the temperature is within the desired range, you already log a message to the serial. You could extend this to handle cases where an adjustment is made, indicating whether the system is heating or cooling: