LispDevice

The LispDevice class handles script execution, event processing, and error management, providing a bridge between Lisp scripts and MQTT communications. By managing the storage and execution of Lisp scripts, LispDevice enables dynamic and programmable behaviors for IoT devices.

Constructor:

• LispDevice() Constructs a LispDevice instance, initializes storage, and sets up event listeners for Lisp message handling.

Methods:

• virtual void syncSubscriptions() override Subscribes to MQTT topics related to script execution and event handling, ensuring that the device listens to relevant messages.

• unLisp &getLisp() Retrieves a reference to the unLisp singleton instance, enabling access to the Lisp interpreter.

• void runStoredCode() Restores stored Lisp scripts from persistent storage and executes them if persistence is enabled and no errors have occurred.

• bool store() Stores the current Lisp script, persistence flag, and checksum to persistent storage, ensuring that scripts can be restored after a reboot or power cycle.

• virtual void onEventReceived(unsigned int topic, int msg) override Handles events received from the unLisp module, such as message errors, logs, additions, and new events, processing them accordingly.

• virtual void handle(const String &topic, const Bytes &payload) override Processes incoming MQTT messages by delegating to specific handlers based on the topic, handling script commands and events.

• void handleScript(const Bytes &payload) Processes incoming script messages, executing new Lisp scripts if they differ from the currently stored script or if persistence is disabled.

• void handleEvent(const Bytes &payload) Processes incoming event messages, forwarding them to the unLisp module for further handling.

Private Members:

• uint32_t mChecksum Stores the checksum of the currently stored Lisp script to detect changes and ensure script integrity.

• bool mPersist Indicates whether the Lisp script should be persisted to storage, allowing it to be restored after a reboot or power cycle.

• bool mFailedWithError Flags whether the last script execution failed with an error, preventing further script executions until resolved.

• String mTopicScript Stores the MQTT topic string for receiving script execution requests.

• String mTopicEvents Stores the MQTT topic string for receiving event-related messages.