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I try to make a Phoniebox from an existing Bluetooth speaker. Everything is working already but I'm missing "play", "prev" and "next" buttons. I would like to use the existing ones from the Bluetooth device. I analyzed the circuit which have only three wires and found out, the signal wire changes the voltage for every button. That means for "prev" is 1.5V, "play" is 3V and "next" is 0.5V.
What do I need to change from SW side to make it work with the Phoniebox config?
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I try to make a Phoniebox from an existing Bluetooth speaker. Everything is working already but I'm missing "play", "prev" and "next" buttons. I would like to use the existing ones from the Bluetooth device. I analyzed the circuit which have only three wires and found out, the signal wire changes the voltage for every button. That means for "prev" is 1.5V, "play" is 3V and "next" is 0.5V.
What do I need to change from SW side to make it work with the Phoniebox config?
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