LILYGO T3-S3 MVSR
ESP32-S3 LoRa voice kit with MAX98357A speaker, MSM261S4030HOR microphone, vibration motor, RTC, 0.96-inch SSD1306 OLED, 4MB Flash, 2MB PSRAM, and SX1262/SX1276/SX1280 radio options — designed for LoRa voice communication and off-grid messaging.
$26.15
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Specifications
Components
Dual-core Xtensa LX7 at 240MHz with 4MB Flash, 2MB PSRAM, WiFi, and BLE 5.0.
0.96-inch monochrome OLED at 128×64 resolution via I2C interface.
Semtech SX1262 sub-GHz LoRa transceiver (433/868/915MHz, variant-dependent).
Maxim MAX98357A I2S digital-to-analog audio amplifier for speaker output.
I2S MEMS microphone for audio capture and voice input.
Bus Interfaces
Overview
The LILYGO T3-S3 MVSR (Microphone, Vibration, Speaker, RTC) is an ESP32-S3 expansion backplate designed for the T3-S3 V1.2 motherboard, adding rich multimedia and communication peripherals. It integrates a MAX98357A I2S audio amplifier with a speaker, an MSM261S4030HOR MEMS microphone for audio capture, a vibration motor for haptic notifications, and an onboard RTC for accurate timekeeping. The board retains the T3-S3's 0.96-inch SSD1306 OLED display (128×64) and is powered by the ESP32S3FH4R2 with 4MB Flash and 2MB PSRAM. LoRa radio options include SX1280 (2.4GHz), SX1276, and SX1262 at 433/868/915MHz. With ultra-low static current and comprehensive IoT peripherals, it is ideal for LoRa voice communication kits, off-grid audio messengers, and Meshtastic voice extension projects. Dimensions: 66×15×27mm.
Use Cases
5LoRa Mesh Networking
Building off-grid mesh communication networks using LoRa radio for text messaging, location sharing, and sensor data relay without cellular or internet infrastructure.
Off-Grid Communication
Text messaging and data exchange in areas without cellular or internet coverage.
IoT
Internet of Things applications including connected sensors, actuators, and smart devices that communicate over WiFi, BLE, LoRa, or other wireless protocols.
Two-Way Radio
Build a digital walkie-talkie or DMR/analog voice radio with programmable channels.
LoRa Messenger
Build an off-grid text messaging device using LoRa for range and low power.
Where to Buy
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