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  • Arduino powered bluetooth remote relay switch

    I have a questiin you may can help with i do heating and air have a unit that has bad tstat wire going from indoor to outdoor unit so it wont allow anything outside to kick on and cant run new wire its not possible is there any bluetooth relay i can build so when thermostat calls for ac it will send signal to od unit and close a relay to allow 24 volts to contator i can put a transformer out there to. Make the 24v but having trouble finding away to control it

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