LILYGO T-Watch S3 Plus
ESP32-S3 smartwatch dev board with LoRa SX1262, GNSS, BMA423 accelerometer, MAX98357A audio, DRV2605 haptic feedback, AXP2101 PMIC, and 940mAh battery for wearable LoRa projects.
$58.74
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Specifications
Certifications
Components
Xtensa LX7 dual-core at 240MHz with 16MB flash, 8MB PSRAM, WiFi, and BLE 5.0.
Long-range LoRa transceiver covering 150–960 MHz with +22 dBm output.
3-axis accelerometer with step counter, activity recognition, and wrist-tilt detection for smartwatch applications.
Filterless 3.2W Class D amplifier with I2S interface for speaker audio output.
I2C haptic motor driver with 123 built-in waveforms for ERM and LRA actuators.
Advanced PMIC with multi-rail LDO outputs, LiPo charging, and fuel gauge.
Bus Interfaces
GPIO Map
Overview
The LILYGO T-Watch S3 Plus is an enhanced smartwatch development platform built around the ESP32-S3 with 16MB flash and 8MB PSRAM. Compared to the standard T-Watch S3, the Plus variant integrates LoRa (SX1262) and GPS for off-grid location-aware communication, enabling Meshtastic mesh networking directly from the wrist.
The wearable feature set includes a BMA423 accelerometer with step counter and activity recognition, MAX98357A Class-D audio amplifier for speaker output, DRV2605 haptic motor driver with 123 waveform effects, and a 940mAh LiPo battery managed by the AXP2101 PMIC with fuel gauging. A microphone is also onboard for voice interaction.
The combination of LoRa, GPS, and a complete wearable sensor suite makes the T-Watch S3 Plus ideal for Meshtastic wrist nodes, search-and-rescue trackers, and custom smartwatch firmware with off-grid messaging capabilities.
Use Cases
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