Audio Codec – Output Sine Wave
- AmebaD [ AMB23 / AMB21 / AMB22 / AW-CU488 Thing Plus ] x 1
- 3.5mm TRS/TRRS breakout x 1 (e.g., Adafruit 2791 / Sparkfun 11570)
Connect the 3.5mm connector to the RTL8722 board following the diagram.
As RTL8722DM MINI have a built in microphone on the board, there is no need for any external microphone.
Open the example, “Files” -> “Examples” -> “AmebaAudioCodec” -> “OutputSineWave”.
Upload the code and press the reset button on Ameba once the upload is finished.
Connect a pair of wired headphones to the 3.5mm audio jack and you should hear the generate single sinusoidal tone.