ELPM-S3LW: Ultra Low Power ESP32-S3FN8 + LoRa IoT Module

Wake up. Sense. Transmit. Power off.

ELPM-S3LW is an ultra-low-power wireless module developed by OBJEX LABS for battery-powered IoT devices, remote sensors, and energy-harvesting applications. It combines the ESP32-S3, SX1262 LoRa transceiver, RV-3028 RTC, and ATECC608C secure element in a compact 30×18 mm module.

What makes it different? Its integrated hardware power latch allows the main electronics to be physically switched off between operations, achieving just 5 nA typical consumption in Deep Stop mode, or approximately 80 nA with RTC wake-up enabled. Instead of keeping the microcontroller asleep, ELPM-S3LW can completely shut down its main power rail, wake up on a scheduled interval or external event, collect data, transmit it, and switch off again.

Key Features

• ESP32-S3FN8: Dual-core processor up to 240 MHz with 8 MB flash and 34 available GPIOs.
• Triple Wireless Connectivity: Wi-Fi 4 (2.4 GHz), Bluetooth LE 5, and SX1262 LoRa/LoRaWAN (862–928 MHz).
• Hardware Power Latch: Physically disconnects the main power rail for extremely low standby consumption.
• Ultra-Low-Power RTC: RV-3028-C7 for scheduled wake-ups and event-driven operation.
• Hardware Security: Integrated ATECC608C secure element for protected key storage, device authentication, and cryptographic operations.
• Flexible Power Management: Independent supply paths for the MCU, sub-GHz radio, and RTC.
• External Antennas: Two 50 Ω U.FL connectors for Wi-Fi/Bluetooth and sub-GHz communication.
• Compact Design: 30×18× 2.83 mm with castellated connections for PCB integration.
• Developer Friendly: Compatible with ESP-IDF, Arduino IDE, and PlatformIO. Programmable through native USB or UART.

Built for Real-World IoT Applications

ELPM-S3LW is particularly suited for applications where devices need to operate for extended periods on limited energy:

• Environmental and agricultural monitoring
• Remote sensing and data logging
• LoRaWAN sensor nodes
• Smart buildings and industrial monitoring
• Asset tracking and cold-chain monitoring
• Event-driven security and alarm sensors
• Energy-harvesting applications

Designed for Developers

ELPM-S3LW is an embeddable module, not a conventional USB development board. It is designed for direct integration into custom PCBs, combining wireless connectivity, ultra-low-power management, and hardware security in a single compact platform.

Developers can use familiar ESP32 development environments while taking advantage of the integrated LoRa radio, independent power domains, and hardware-controlled shutdown. Whether you're developing a battery-powered sensor, a remote monitoring system, or a custom connected product, ELPM-S3LW provides a flexible foundation without the complexity of integrating multiple separate components.

Engineering Sample Notice

Current ELPM-S3LW units are engineering samples intended for hardware evaluation, prototyping, and integration testing. They are not yet CE or FCC certified and are not intended for incorporation into products placed on the market.

Deep Stop consumption figures are typical measurements obtained from engineering samples at 3.3 V and room temperature. Actual power consumption depends on the final hardware configuration and operating conditions.

All orders are shipped from Palermo, Italy, and carefully packaged to ensure safe delivery. Shipping costs and available delivery options are displayed at checkout. Tracking information is provided when available. Delivery times may vary depending on the destination and carrier. For international orders outside the EU, any applicable customs duties, import taxes, or additional fees are the buyer's responsibility. For shipping questions, please contact us at info@objexlabs.com