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A comment on I Bought a CO2 Monitor, and It Broke Me. Parent comment

Re:I Bought a CO2 Monitor, and It Broke Me by secabeen on Friday February 03, 2023 @10:58PM (#34651328)
ESPHome on a ESP32 makes a nice Bluetooth2Ethernet Bridge.

I've seen Aranet4's on eBay for under $150 pretty regularly, so I'd look there.

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