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In iOS open the settings app and click on "Bluetooth". It will show up under discovered devices.
Sorry for the poor diagram. I know it's difficult to read. C_4 and C_5 are electrolytic capacitors. That means they are polarized. The dark bar is the positive plate and the light bar is the negative plate. Both negative plates of the capacitors are connected to pin 2 (GND). The positive plate of C_4 is connected to pin 1 (IN) and the positive plate of C_5 is connected to pin 3 (OUT).
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