PWJ-AQ-Raw24 (Palmerah West Jakarta IoT Air Quality Raw Log)

PWJ-AQ-Raw24 (Palmerah West Jakarta IoT Air Quality Raw Log, 2024) is a raw, high-frequency environmental sensor log collected from a single ESP32-based IoT monitoring node deployed in the Palmerah sub-district of West Jakarta, Indonesia. The dataset comprises approximately 6,800–7,000 timestamped observations recorded at a nominal 4-second sampling interval across nine non-contiguous measurement days between 21 June 2024 and 27 July 2024. Each record includes a full timestamp, station location (kecamatan/kota), and five environmental parameters: PM2.5 concentration (μg/m³, GP2Y1010AU0F optical sensor), carbon monoxide (CO, MQ-7 sensor), carbon dioxide (CO₂, MQ-135 sensor), ambient temperature (°C), and relative humidity (%RH), all captured via a DHT11 co-located sensor. This file represents the unprocessed source log underlying the aggregated hourly AQI comparisons reported in the accompanying validation study; it has not been cleaned, calibrated, or filtered for sensor-fault values. Known data-quality caveats (disclosed for reuse): the CO₂ channel contains out-of-specification readings (values far exceeding the MQ-135's rated 10–300 ppm range) in a majority of records, consistent with uncalibrated raw ADC output rather than true ppm concentration, and should not be used without a documented conversion/cleaning step. A smaller fraction of CO and temperature readings likewise fall outside sensor-rated bounds. The PM2.5 channel is comparatively clean and is the primary validated parameter used for AQI derivation in downstream analysis. Researchers reusing this dataset should treat CO and CO₂ columns as provisional pending recalibration, and should not assume temporal continuity across the nine sampling dates, which represent discrete field sessions rather than a continuous monitoring period.