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1. Product Introduction
▫️ Key Features
Ra-03SCH
This module is designed for ultra-long-range spread spectrum communication. It employs the LLCC68 RF chip and SEMTECH's LoRa™ modulation technology. The chip features -129 dBm high sensitivity and +22 dBm transmit power, delivering ultra-long-range, highly reliable communication while demonstrating exceptional anti-interference capabilities and low power consumption. LoRa™ technology effectively addresses the challenge of balancing range, anti-interference performance, and power consumption in conventional solutions.
It is suitable for widespread applications including automatic meter reading, home and building automation, security systems, remote irrigation systems, and more.
▫️ Technical Highlights
Supports FSK, GFSK, and LoRa® modulation methods.
Covers the frequency band from 803 MHz to 930 MHz.
Operates at 3.3 V with a maximum output power of +22 dBm and a maximum operating current of 140 mA.
Exhibits low power consumption in receive mode, with a minimum receive current of 4.2 mA and a standby current of 0.6 mA.
High sensitivity: down to -129 dBm.
Supports spreading factors SF5/SF6/SF7/SF8/SF9/SF10/SF11.
Compact dual-row stamp-hole SMD package.
Utilizes an SPI interface with half-duplex communication, featuring CRC and a packet engine supporting up to 256 bytes.
Antenna interface uses half-hole pads for connecting to an external antenna on the main board.
▫️ Selection Table
Multi-select supported. Exported images include all selected products.
| Parameter |
|---|
| Product Image |
| Wireless Protocol |
| Chip |
| Module Flash Size (Mbits) |
| Frequency Band (MHz) |
| Package |
| Dimensions (L×W×H) (mm) |
| Operating Temp Range (℃) |
| Storage Temp Range (℃) |
| Antenna Type |
| Interface |
| Available GPIO |
| Min Voltage (V) |
| Max Voltage (V) |
| Typical Voltage (V) |
| Max Current (mA) |
| Rx Current (mA) |
| Standby Current (μA) |
| Sleep Current (μA) |
| Certifications |
| Max TX Power (dBm) |
| Modulation |
| Max Distance (m) |
| Protocol Support |
2. About Modules
| Module | Datasheets | PCB Footprints |
|---|---|---|
| Ra-03SCH | View | Download |
| Ra-03SCH(High-Temperature Version) | View | *** |
3. STM32F103C8T6 HAL-based driver
| Module | Link |
|---|---|
| Ra-03SCH | Download |
4. Certification Related
| Module | Certificate | Link |
|---|---|---|
| Ra-03SCH | ANATEL | View |
| Ra-03SCH | CE (RED) | View |
| Ra-03SCH | FCC - LoRaWAN Protocol | View |
| Ra-03SCH | FCC - Private Protocol | View |