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SIMPRONICS ELECTRONICS & EMBEDDED SYSTEMS
TECHNICAL DATASHEET: LORA SX1276 DEVELOPER BREAKOUT BOARD
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1. PRODUCT OVERVIEW
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The Simpronics LoRa Breakout Board is a developer-friendly breakout for Semtech's 
SX1276 ultra-long-range wireless transceiver. It features a compact layout with 
breadboard-compatible pin headers, an integrated SMA antenna connector, decoupling 
capacitors, and logic level shifting circuits to make prototype testing simple.

2. RF CHARACTERISTICS
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- Transceiver IC:           Semtech SX1276
- Frequency Bands:          868 MHz (Europe/India) & 915 MHz (North America)
- Output Power:             +20 dBm max (adjustable via software registers)
- Sensitivity:              Down to -148 dBm
- Modulation Schemes:       LoRa, FSK, GFSK, MSK, GMSK, OOK
- Interface:                SPI Bus (MISO, MOSI, SCK, NSS) plus DIO0-DIO5 pins

3. ELECTRICAL SPECIFICATIONS
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- Input Voltage:            3.3V to 5.0V DC (VCC pin)
- Logic Level Shift:        Bi-directional level translation on all SPI/DIO pins 
                            (fully compatible with both 3.3V and 5V microcontrollers)
- Current Draw (TX):        120 mA at +20dBm
- Current Draw (RX):        12 mA
- Current Draw (Sleep):     1.5 uA

4. PINOUT DESCRIPTION (Standard 2.54mm pitch breadboard-friendly pins)
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- Pin 1:   GND    - Ground power reference
- Pin 2:   VCC    - Positive power supply (3.3V - 5.0V input)
- Pin 3:   MISO   - SPI Master Input Slave Output (Data output to MCU)
- Pin 4:   MOSI   - SPI Master Output Slave Input (Data input from MCU)
- Pin 5:   SCK    - SPI Clock
- Pin 6:   NSS    - SPI Chip Select (Active Low)
- Pin 7:   RST    - Device Reset (Active Low)
- Pin 8:   DIO0   - TxDone / RxDone Interrupt (Configurable GPIO)
- Pin 9:   DIO1   - RxTimeout / FhssChange Interrupt (Configurable GPIO)
- Pin 10:  DIO2   - CADDetected / FhssChange (Configurable GPIO)

5. COMPLIANCE & USAGE RECOMMENDATIONS
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- Always attach an antenna before performing TX broadcasts to prevent RF output stage damage.
- Shielded ground plane reduces EMI and boosts reception sensitivity.
- Certified under FCC Part 15 and CE. RoHS compliant.

Designed & Engineered in India.
For support, contact: sales@simpronics.com
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