Note: This is the Markdown version of my presentation
LB5JJ
https://lb5jj.no/aprs/lora/
- Automatic Packet Reporting System
- Tracking and messaging in amateur radio
- Mostly used on 144.800 MHz (let's change that)
- Tracking
- Messaging
- Weather station and other sensors
- Long Range, Low Power wireless technology
- Based on Chirp Spread Spectrum (CSS) modulation
- Long-range communication (100+ km in open areas)
- Low power consumption
- Advantages over traditional APRS
- Greater range with lower power
- Suitable for modern, low-cost hardware
- Enhanced reliability in challenging environments
- SX1276/78
- Arduino, ESP32
- GPS receivers for position tracking
- Pre-built modules with all 3 functions on one PCB
- Ricardo Guzman (CA2RXU) firmware:
- Tracker
- iGate/Digipeater
- APRS.fi app for iPhone (BLE)
- APRSDroid for Android (BLE)
- PinPoint APRS for Windows (BLE, USB Serial or WiFi)
- Get position from GPS, or;
- Enter message on phone or keyboard
- Encode as APRS message
- Packet sent over LoRa
- Repeated by Digipeaters
- Relayed via the Internet by iGates
- Received by other LoRa APRS devices
- Adventure tracking (SOTA, POTA, Hiking)
- Off-grid messaging
- Disaster and emergency communication and tracking
- Monitoring weather stations and other sensors:
- Alarms
- Temperature
- Battery voltage
- Others
- Acquire LoRa module (eBay, AliExpress, etc)
- Install firmware (Web installer for Guzman Firmware)
- Configure (Web config for Guzman Firmware)
- Connect to APRS-IS (for iGate)
- Connect to phone / PC (Optional; for tracking/messaging)
- Up to 200 kHz bandwidth between 433.600 and 434.000 MHz now allowed in Norway
- LoRa APRS sits on 433.775 MHz and uses 125 kHz bandwidth
- Only about 1/7th the transfer rate of 1200 Baud packet
- Keep your transmissions as short as possible!