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Desk research dated 2026-10-23; no physical tests or cybersecurity certification. Wi-Fi model I-9PSL with official firmware, local API enabled and cloud connectivity retained. Local HTTP and unauthenticated configuration require a trusted isolated network; cloud accounts do not protect the local API. Date is Version 9 announcement/order availability (2023-10-21); shipping was scheduled for early November. Current product page gives 130 x 130 x 35 mm and 350 g; an older revision sheet differs, so hardware revision should be checked. Flash/configuration and logging ratings use 3.7.0 source. Incident categories reflect published evidence rather than measured rates; None means no qualifying incident identified, not zero risk. Physical tampering is an assessor rating of accessible reset/reflash interfaces and the physical-access requirement; it is not an incident-frequency statistic. Release-date scope: Founder announcement/order availability of AirGradient ONE Version 9; stated shipping in first half of November 2023, not a precise first-shipment date. Product status: In sale. Current manufacturer page offers the I-9PSL Wi-Fi monitor. Proposed IDRS calculation under the assessment scope above: Device 2, System 3, User Authentication 3, total 8, grade D. Source methodology: https://fehmijaafar.net/wiki-iot/index.php/Methodology . This documentation-based rating is not an unconditional security certification. Firmware scope: Official AirGradient ONE firmware 3.7.0 source reference, local HTTP API enabled and cloud connection retained for updates. Historical 2025 hotspot weakness is distinguished from current source behavior. Additional references: * [https://www.airgradient.com/indoor/] * [https://www.airgradient.com/documents/spec-sheets/Spec_Sheet_AirGradient_ONE_I-9PSL.pdf] * [https://www.airgradient.com/documentation/kb/where-do-i-access-the-api-documentation-api-token-and-local-api] * [https://github.com/Open-Air-Foundation/firmware-one-openair/blob/master/docs/local-server.md] * [https://www.airgradient.com/documentation/kb/connecting-your-airgradient-one-to-wifi] * [https://www.airgradient.com/documentation/kb/kb-firmwares-airgradient-one-i-9psl-open-air-o-1pst-and-open-air-max-o-m-1ppst-firmware-versions] * [https://www.airgradient.com/documentation/kb/troubleshooting-wifi-connection] * [https://github.com/Open-Air-Foundation/firmware-one-openair/releases] * [https://forum.airgradient.com/t/new-airgradient-indoor-kit-monitor-available-now/1240] * [https://www.airgradient.com/documentation/kb/powering-the-airgradient-one] * [https://www.airgradient.com/documentation/kb/kb-diy-it-security-policy-for-deployment-of-airgradient-monitors] * [https://forum.airgradient.com/t/concern-about-hijackable-wifi-connection/3845/20] * [https://github.com/Open-Air-Foundation/firmware-one-openair/blob/3.7.0/partitions.csv] * [https://github.com/Open-Air-Foundation/firmware-one-openair/blob/3.7.0/src/AgConfigure.cpp] * [https://docs.espressif.com/projects/esp-idf/en/stable/esp32c3/security/flash-encryption.html] * [https://github.com/Open-Air-Foundation/firmware-one-openair/blob/3.7.0/examples/OneOpenAir/LocalServer.cpp] * [https://www.cisa.gov/sites/default/files/feeds/known_exploited_vulnerabilities.json] * [https://forum.airgradient.com/t/new-airgradient-indoor-kit-monitor-available-now/1240]
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