1.9 KiB
1. System Assumptions
SA-01: Deployment Environment
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The Sensor Hub operates in an indoor poultry farm environment.
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Environmental conditions may include high humidity, dust, and ammonia presence.
SA-02: Power Availability
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The Sensor Hub is assumed to have continuous power.
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Short power interruptions may occur; system shall recover gracefully.
SA-03: Network Connectivity
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Wireless connectivity to the Main Hub may be intermittent.
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The Sensor Hub shall operate autonomously when disconnected.
SA-04: Trusted Provisioning
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Devices are assumed to be provisioned securely during manufacturing or installation.
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Cryptographic keys are assumed to be injected via a secure process.
SA-05: Time Synchronization
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System time is assumed to be synchronized periodically by the Main Hub.
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Temporary time drift is acceptable.
2. System Limitations
SL-01: Local Processing Limits
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The Sensor Hub performs lightweight preprocessing only.
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Complex analytics and AI models are out of scope.
SL-02: User Interface Constraints
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The OLED display is intended for monitoring and diagnostics only.
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It is not a full configuration or management interface.
SL-03: Physical Security
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The Sensor Hub does not include physical tamper detection.
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Physical access is assumed to be restricted.
SL-04: Storage Constraints
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SD card storage capacity is finite.
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Data retention policies may result in data overwrite.
SL-05: Safety Classification
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The system is not classified as a safety-critical life-support system.
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Failures may impact farm performance but not human safety directly.
3. External Dependencies
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ESP32-S3 hardware platform
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ESP-IDF framework
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Supported sensors and communication modules
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Main Hub availability for OTA and configuration updates