ENABLE_BME280

Flag to enable BME280 environmental sensor.

Controls whether temperature, pressure, and humidity fields are included in event output.

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Default

• v2: Enabled by default (ENABLE_BME280=1)
• v1: Enabled by default (ENABLE_BME280=1)

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Options

• ENABLE_BME280=1: Include temperature (tmp_c), pressure (atm_pa), humidity (hmd_pct) fields (default)
• ENABLE_BME280=0: Exclude environmental fields (smaller firmware size)

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Override with platformio.override.ini

[env:esp32dev-v2]
build_flags =
    -D ENABLE_BME280=0

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Memory Overhead

• Flash: Minimal (sensor read + field serialization)
• RAM: ~3 floats per event (12 bytes)
• Zero overhead when disabled: All code excluded by preprocessor

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History

• v1.7.0 — Initial implementation