LILYGO T3-S3 MVSR Board

Version Iteration

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Table of Contents

• Description
• Preview
• Modules
• Quick Start
• Pin Overview
• Related Tests
• FAQ
• Projects
• Resources
• Dependent Libraries

Description

The T3-S3 MVSR version is based on the T3-S3 main board with an extended module featuring vibration motor, microphone, speaker, and RTC functions. The main application of this version is for LoRa voice transmission and reception. This extended version currently supports both SX1262 and SX1280 models of the T3S3 motherboard. The SX1262 version uses FSK modulation, while the SX1280 version uses LoRa modulation. Corresponding test demos are available on GitHub for your development reference. Of course, this extended version can also be used for AI voice interaction functions, MP3 playback, and more.

Preview

Physical Image

Pinout Diagram

Modules

MCU

• Chip: ESP32-S3FH4R2
• PSRAM: 2MB (OPI PSRAM)
• FLASH: 4MB
• Wireless: 2.4GHz Wi-Fi + Bluetooth 5.0

Speaker

• Chip: MAX98357A
• Bus Communication Protocol: IIS
• Other: Default uses 9dB gain
• Related Resources:

  MAX98357A

• Dependent Libraries:

  Arduino_DriveBus-1.1.16

Microphone

T3-S3-MVSRBoard_V1.0 Version

• Chip: MSM261S4030H0R
• Bus Communication Protocol: IIS
• Related Resources:

  MSM261S4030H0R

• Dependent Libraries:

  Arduino_DriveBus-1.1.16

T3-S3-MVSRBoard_V1.1 Version

• Chip: MP34DT05-A
• Bus Communication Protocol: PDM
• Related Resources:

  MP34DT05-A

• Dependent Libraries:

  Arduino_DriveBus-1.1.16

RTC

• Chip: PCF85063ATL
• Bus Communication Protocol: IIC
• Related Resources:

  PCF85063ATL

• Dependent Libraries:

  Arduino_DriveBus-1.1.16

Wireless Communication

• LoRa Module: SX1262 / SX1280
• Frequency Bands: 868/915MHz (SX1262) / 2.4GHz (SX1280)
• Modulation: FSK (SX1262) / LoRa (SX1280)

Function Expansion

• Vibration Motor: Haptic feedback
• Storage: TF Card Expansion

Overview

The T3-S3-MVSRBoard is a backplane design for the T3-S3_V1.2 main board, featuring onboard speaker and microphone expansion functions with extremely low static current. Additionally, it includes vibration and RTC (Real-Time Clock) functions.

Quick Start

Example Support

PlatformIO

1. Install Visual Studio Code, choose the installation according to your system type.
2. Open the "Extensions" in the Visual Studio Code sidebar (or use Ctrl+Shift+X to open extensions), search for the "PlatformIO IDE" extension and download it.
3. During the extension installation, you can go to GitHub to download the code. You can download the main branch code by clicking the green "<> Code" button, or download the "Releases" version from the sidebar.
4. After the extension installation is complete, open the sidebar's Explorer (or use Ctrl+Shift+E to open it), click "Open Folder", find the recently downloaded project code folder (the entire folder), and click "Add". Now the project files are added to your workspace.
5. Open the "platformio.ini" file in the project folder (PlatformIO will automatically open the "platformio.ini" for the corresponding folder), under the "[platformio]" section, uncomment to select the example program you want to flash (headed by "default_envs = xxx"), then click the "√" at the bottom left to compile. If the compilation is successful, connect the microcontroller to your computer, and click the "→" at the bottom left to flash.

Arduino

1. Install Arduino IDE, choose the installation according to your system type.
2. Open the "example" directory in the project folder, select the example project folder, and open the file ending with ".ino" to open the Arduino IDE project workspace.
3. Open the "Tools" menu in the top right corner -> Select "Board" -> "Board Manager", find or search for "esp32", and download the board files by "Espressif Systems". Then return to the "Board" menu and select the "ESP32S3 Dev Module" board.
4. Open the menu "File" -> "Preferences", find the "Sketchbook location" field, and copy all library files along with their folders from the "libraries" folder in the project directory to the "libraries" folder in this location.
5. Select the correct settings in the "Tools" menu as shown in the table below.

ESP32-S3

6. Select the correct port.
7. Click the "√" in the top right corner to compile. If the compilation is successful, connect the microcontroller to your computer, and click the "→" in the top right corner to flash.

Development Platforms

1. Micropython
2. Arduino IDE
3. Platform IO
4. VS Code

Pin Overview

T3-S3-MVSRBoard_V1.0 Version

T3-S3-MVSRBoard_V1.1 Version

Related Tests

Power Consumption

Audio Performance

FAQ

• Q. How to adjust external antenna resistance?
  A. Refer to the arrow in the image below to replace the resistor to adjust the external antenna resistance:

  

• Q. What's the difference between SX1262 and SX1280 versions?
  A. SX1262 supports 868/915MHz frequency bands and uses FSK modulation; SX1280 supports 2.4GHz frequency band and uses LoRa modulation.

• Q. Which audio formats are supported?
  A. Supports common audio formats like WAV, MP3, etc., and can be extended with software decoding libraries.

• Q. What is the LoRa voice communication range?
  A. Under ideal conditions, voice communication range can reach several kilometers, depending on environmental factors and antenna configuration.

• Q. Does it support real-time voice transmission?
  A. Supports real-time voice acquisition, compression, and LoRa transmission, enabling voice intercom functionality.

Projects

• T3-S3-MVSRBoard_V1.0

Resources

• MAX98357A Datasheet
• MP34DT05-A Datasheet
• PCF85063ATL Datasheet
• MSM261S4030H0R Datasheet
• ESP32-S3 Datasheet

Dependent Libraries

• Arduino_DriveBus
• Audio Libraries
• LoRa Radio Libraries