Waveshare ESP32-S3-LR1121
Compact castellated ESP32-S3 development board with Semtech LR1121 multi-band LoRa transceiver supporting Sub-GHz and 2.4GHz bands, WiFi, BLE 5.0, and Meshtastic compatibility in a 41x21mm form factor.
$14.99
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Specifications
Components
Espressif ESP32-S3 Xtensa LX7 dual-core @ 240MHz with 512KB SRAM, 2MB PSRAM, WiFi 802.11 b/g/n and BLE 5.0
Semtech LR1121 third-generation LoRa transceiver supporting Sub-GHz + 2.4GHz + S-Band with LoRa/(G)FSK/LR-FHSS, AES-128 encryption, and -127dBm sensitivity
Bus Interfaces
GPIO Map
Overview
The Waveshare ESP32-S3-LR1121 is a compact development board combining the ESP32-S3 dual-core processor with Semtech's third-generation LR1121 multi-band LoRa transceiver. Available in HF (850-930MHz + 2.4GHz) and LF (410-510MHz + 2.4GHz) variants, it supports LoRa, (G)FSK, and LR-FHSS modulation with typical ranges of 5km on Sub-GHz and 2km on 2.4GHz ISM band.
The board features a castellated module design at 41x21mm, making it suitable for both breadboard prototyping and direct soldering onto carrier PCBs. It includes an IPEX-1 antenna connector, TCXO crystal oscillator for frequency stability, and AES-128 hardware encryption. With Meshtastic firmware support, it can be used immediately for off-grid mesh networking.
The ESP32-S3 provides WiFi 802.11 b/g/n and BLE 5.0 connectivity alongside the LoRa radio, enabling dual-path communication for IoT gateways and sensor nodes that need both local wireless and long-range capabilities.
Use Cases
6LoRa 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.
IoT Gateway
Acting as a local IoT gateway that aggregates data from sensors, runs MQTT broker, Node-RED, or Home Assistant, and bridges to the cloud.
Remote Sensor Nodes
Deploy wireless sensor nodes in remote locations using LoRa, NB-IoT, or cellular connectivity.
Environmental Monitoring
Monitoring environmental conditions like temperature, humidity, air quality, and weather data using remote sensors.
Off-Grid Communication
Text messaging and data exchange in areas without cellular or internet coverage.
Smart Agriculture
Enables precision farming through remote sensor monitoring of soil, weather, and crop conditions over LoRaWAN networks.
Resources
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