LILYGO T3-S3 MVSR is A ESP32-S3 LoRa voice communication board with mic, speaker, and OLED

The T3-S3 MVSR by LILYGO is a compact LoRa voice communication kit designed for long-range audio transmission using LoRa technology. It features a built-in vibration motor, speaker (MAX98357A), microphone (MSM261S4030HOR), and a 0.96-inch OLED display with a resolution of 128×64, driven by the SSD1306 I2C interface.

At its core, it is powered by the ESP32-S3FH4R2 MCU with 4MB Flash and 2MB PSRAM, and it supports 2.4GHz Wi-Fi and Bluetooth 5.0. It includes onboard Reset, Boot buttons and microSD card support and is powered via USB or a 3.7V LiPo battery with a charging input of 5V 500mA. With its compact size of 66 x 15 x 27mm, the T3-S3 MVSR is ideal for remote voice communication projects, DIY wireless intercom systems, and educational or experimental IoT applications.

It is not the first time we are talking about the LoRa voice communication board, as we have previously covered the TTGO LoRa32 development boards, which add LoRa to the onboard communication features. LoRa has been used for peer-to-peer and mesh messaging with firmware like MeshTastic. However, its low bandwidth puts some limitations on what it can handle.

LILYGO T3-S3 MVSR Specifications:

• MCU: ESP32-S3FH4R2
  • CPU: dual-core Xtensa LX7 processor, up to 240 MHz
  • Memory: 2MB PSRAM
  • Storage: 4MB Flash
• Storage: microSD card slot
• Display: 0.96-inch OLED display (SSD1306 driver)
  • Resolution: 128×64
  • I2C interface (SDA – IO18, SCL – IO17)
• Audio:
  • MAX98357A I2S amplifier with speaker output
  • MSM261S4030HOR MEMS microphone
• Connectivity:
  • 2.4GHz Wi-Fi 802.11b/g/n
  • Bluetooth 5.0 (LE)
• LoRa Module:
  • LoRa32 (868MHz version shown – H595-01)
  • LoRa 2.4GHz module
• USB: 1x USB Type-C for power and programming
• Misc:
  • Vibration motor
  • Reset and Boot buttons
  • RTC with backup battery
• Power Supply:
  • 5V @ 500mA via USB-C
  • 3.7V LiPo battery support
• Dimensions: 66 x 15 x 27 mm

GitHub provides sample code and basic instructions for the T3-S3 MVSR LoRa Voice communication kit so you can easily start and try things out. You can go to our GitHub community and explain the issue you’re facing, and someone from the team will help you out.

At the time of writing, LILYGO sells the T3-S3 MVSR LoRa voice kit for $26.74 through their official website, but it’s out of stock right now. They ship worldwide, and it’ll probably show up on AliExpress and Amazon soon since they usually list their stuff there.

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