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help WIFI Arduino nano Windspeed
I have a Arduino nano connected to a AF-1733 I am powering it via 12V.  I would like to add a ESP 8266 to transmit data to the RPI The ESP 8266 requires 3.3 Volt at a max current that is greater than the Nano can supply.
How would i step this down to 3.3 V with a max current of 400 ma?

Is there a better way to get the Data to the RPI like a nrf24l01+?

I would prefer not to use  my Serial port on the RPI

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