About the internal GPIO pins – Home Assistant Voice Preview Edition

GPIO pin header group 1

Pin assignments:
- IO47, GND
- IO42, RGBOUT
- IO41, RGBIN
- IO40, IO48
Notice: Risk of damaging VPE components due to high current.
- Current drawn from GPIO pins should be limited to 20 milliamps (mA) or damage to the ESP32-S3 may occur.
RGBIN/RGBOUT pins:
- The RGBIN/RGBOUT pins are connected to the LEDs in the LED ring on top.
- They could be used to connect additional WS2812-type LEDs.
- RGBIN is connected to the input of the first LED in the ring.
- RGBOUT is connected to the output from the last LED in the ring.

Pin assignments:
- +3.3 V, +5 V
- IO02, IO39
- IO01, IO38
- RXD, TXD
Power pins (+5 V, +3.3 V):
- Notice: Risk of damaging VPE components due to high current.
  - Mind the power limitations
    - The amount of power you can draw from the power pins (+5 V, +3.3 V) on these headers depends on the capabilities of the power supply you are using; most common USB power supplies can supply either 1, 2, or 3 amps.
    - Reputable power supplies will be labeled with their capabilities (voltage, current).
    - Regardless of the power supply, do not attempt to draw more than 2 amps (total) from the +5 V and +3.3 V pins. Drawing more current than this from these pins may cause damage to components in the VPE, causing it to stop working.
ESP32-S3 TXD and RXD pins:
- The ESP32-S3’s U0TXD and U0RXD (serial/UART) pins are not used by the firmware shipped with the VPE.
- If you want to watch logs and/or reinstall the ESP32-S3, use the built-in USB port.

Pin assignments: SCL, SDA, 5V, GND
Notice: Risk of damaging VPE components due to high current.
- Current drawn from GPIO pins should be limited to 20 milliamps (mA) or damage to the ESP32-S3 may occur.
+5V pin power switching:
- The Grove expansion port has a “load switch” on its +5 V pin.
- This is controlled by the ESP32-S3’s GPIO pin 46.
- Power is not available on the Grove port’s +5 V pin unless this GPIO pin is switched on (high).