Read the Docs Template Documentation, Release
1.1.2 Start Application Development
Before powering up the ESP32-LyraT, please make sure that the board has been received in good condition with no
obvious signs of damage.
Initial Setup
Prepare the board for loading of the first sample application:
1. Connect 4-ohm speakers to the
Right
and
Left Speaker Output
. Connecting headphones to the
Headphone
Output
is an option.
2. Plug in the Micro-USB cables to the PC and to
both USB ports
of the ESP32 LyraT.
3. The
Standby LED
(green) should turn on. Assuming that a battery is not connected, the
Charging LED
(red)
will blink every couple of seconds.
4. Toggle left the
Power On Switch
.
5. The red
Power On LED
should turn on.
If this is what you see on the LEDs, the board should be ready for application upload. Now prepare the PC by loading
and configuring development tools what is discussed in the next section.
Develop Applications
If the ESP32 LyraT is initially set up and checked, you can proceed with preparation of the development tools. Go to
section
, which will walk you through the following steps:
•
in your PC that provides a common framework to develop applications for the ESP32 in C
language;
•
to have the API specific for the audio applications;
•
to make the framework aware of the audio specific API;
•
that will provide a sample audio application for the ESP32-LyraT board;
•
to prepare the application for loading;
•
this will finally run the application and play some music.
1.1.3 Summary of Key Changes from LyraT V4.2
• Removed Red LED indicator light.
• Introduced headphone jack insert detection.
• Replaced single Power Amplifier (PA) chip with two separate chips.
• Updated power management design of several circuits: Battery Charging, ESP32, MicorSD, Codec Chip and
PA.
• Updated electrical implementation design of several circuits: UART, Codec Chip, Left and Right Microphones,
AUX Input, Headphone Output, MicroSD, Push Buttons and Automatic Upload.
1.1. ESP32-LyraT V4.3 Getting Started Guide
7
Содержание ESP32-LyraT
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