1.1 KiB
1.1 KiB
I2S Analog Output Test
This is a simple basic test for the ESP32 analog output using I2S.
We just send a generated sine wave and expect to hear a clean signal. Please note the log level should be set to Warning so that there is no disturbing output!
Make sure that you do not use any noisy power supply!
Output Device: Earphones
You can also use some simple earphones
On the ESP32 the stereo output is on the Pins GPIO25 and GPIO26
| Earphone | ESP32 | UNO R4 |
|---|---|---|
| Left | GPIO25 | A0 |
| Righ | GPIO25 | GND |
| GND | GND | GND |
Output Device: Piezo Electric Element
To test the output I am using a piezo electric element
On the ESP32 the stereo output is on the Pins GPIO25 and GPIO26
| PIEZO | ESP32 | UNO R4 |
|---|---|---|
| + | GPIO25 | A0 |
| - | GND | GND |