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Re:Turning a Dumb AC Unit Smart (Without Losing My Security ... by chpatrick on Wednesday July 29, 2026 @04:52PM (#49102932)
Some ACs have UART interfaces inside that can be fairly easily hooked up to an esp32.

You could also buy an IR transmitter module from AliExpress and add a temperature/humidity sensor chip on I2C like an SHT41.

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