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I've just got my RPI and im aiming to use it as a server (forwarding sent chars from android device over wifi to arduino) any ideas how can this work(or at least a part of it)?
You can setup a node.js server (TCP or HTTP) to capture input from your Android over wifi to a serial port where the Arduino is connected.
If your RPi and Arduino are not connected with a cable, you can use BT modules to connect them.
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