Espressif ESP32-LyraT Docs Template Documentation page 20

Read the Docs Template Documentation, Release
In this mode:
• MicroSD Card functionality is not available, remove the card from the slot
• Vol- touch button is not available for use with the API
• AUX Input detection from the API is not available
Allocation of ESP32 Pins
Several pins / terminals of ESP32 modules are allocated to the on board hardware. Some of them, like GPIO0 or
GPIO2, have multiple functions. Please refer to the tables below or
Red / Green LEDs
Touch Pads
1. Vol- function is not available if JTAG is used. It is also not available for the MicroSD Card configured to
operate in 4-wire mode.
MicroSD Card / J5
16
ESP32 Pin LED Color
1 GPIO19 Red LED
2 GPIO22 Green LED
ESP32 Pin Touch Pad Function
1 GPIO33 Play
2 GPIO32 Set
1
3 GPIO13 Vol-
4 GPIO27 Vol+
ESP32 Pin MicroSD Signal
1 MTDI / GPIO12 DATA2
2 MTCK / GPIO13 CD / DATA3
3 MTDO / GPIO15 CMD
4 MTMS / GPIO14 CLK
5 GPIO2 DATA0
6 GPIO4 DATA1
7 GPIO21 CD
ESP32 LyraT V4.2 schematic
Chapter 1. Get Started
for specific details.