ESP32-S3 LoRaWAN

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ESP32-S3 LoRaWAN board takes up to 100W power input

OBJEX Link S3LW is a small development board based on the ultra-low-power ELPM-S3LW module with ESP32-S3 MCU and LoRaWAN connectivity and the ability to take 100W input via USB-C or a 2-pin terminal block for driving motors, controlling RGB LED strips, and other high-power projects.



It’s compliant with the USB PD standard, features two 28-pin headers and a STEMMA I2C connector for expansion, as well as a built-in CP2102/CP2104 USB to serial bridge for debugging, and a few buttons.  The company also offers an OBJEX ELPM-S3 module and OBJEX Link S3 board with the same features, minus LoRa/LoRaWAN support.


OBJEX Link S3LW


OBJEX Link S3LW specifications:


Wireless module ELPM-S3LW v1.2

Wireless SoC – ESP32-S3FN8

CPU – Dual-core 32-bit Xtensa LX7 microcontroller with AI vector instructions up to 240MHz, RISC-V ULP co-processor

Memory – 512KB SRAM

Storage – 8MB flash

Wireless – 2.4GHz WiFi 4 (802.11b/g/n), Bluetooth 5.0 BLE + Mesh

LoRa support

LoRa Transceiver – Semtech SX1262 connected over SPI to the ESP32-S3 MCU

Frequency bands –  862 MHz to 928 MHz

Tx power – 22 dBm

Range – 10 km

Full compatibility with LoRa and LoRaWAN

Antenna

Ceramic antenna for WiFi/BLE

50 Ohm pin for WiFi/BLE

50 Ohm U.FL/pad antenna for LoRa

Expansion – 33x GPIO pins with I²C, I²S, SPI, UART, and USB; note: 7x reserved for LoRa – SPI

Misc – RGB status LED (WS2812B)

Low Power features (Deep Stop mode)

Dedicated LDO1 3V3@300mA for ESP32

Rising/falling edge detector (1-30nA)

Wake and Gate input (1-30nA)

RTC RV-3028-C7 (45-100nA)

Dedicated RTC power supply pad

Battery level circuit (zero leakage mesh current)

Dimensions – 30 x 18 mm

Weight – 2.30 grams

Expansion

2x 28-pin headers with I/Os from the module and 5V, 3.3V, GND power signal

4-pin STEMMA I2C connector

Debugging –  USB to UART Bridge (CP2102/CP2104)

Power switch

Four buttons (BOOT, MAKE, BTN*, RST)

Configuration jumpers

Power Supply

Up to 21V/5A via USB-C PD (Type 2.0 PD PPS 3.0)

Terminal block for Vbus (USB Type-C PD)

DC/DC synchronous step-down (V-out: 5V/2 A)

Dimensions – 84.74 x 30.50 mm

Weight – 16.85 grams

ESP32-S3 LoRaWAN board 100W USB-C PD board

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