- Air interface
- Mesh network - self-forming and self-healing
- AFU compatible of Source, Node, Gateway, Destination identifier as callsign
- Protocol adapted to APRS/AX.25.
- Path control structure (for test purposes only)
- Structure of the payload embedded in the structure of the message
- In addition to the transmission security provided by the hardware, CRC and FEC must be planned into the structure of the message
- Message and payload transmitted compressed
- Node, Digipeater-only, Gateway-only, Point-to-Point (network extensions)
- unencrypted
- Address header (FromCALL, ToCALL, VIA) compressed and with CRC (compatible with AX25v2)
- Messages prioritization
- Gateway interface
- Establish APRS protocol with usual field structure
- UDP transmission
- Heartbeat for client/server ONLINE detection
- Depth of message from and to gateway adjustable (test and development facilitation)
- After restarting a gateway automatic transfer of basic data like:
- active NODES
- last messages
- Triggering the Store & Forward messages
- Module interfaces
- Serial via USB
- GPIO for external hardware and controls
- GPS internal, external, fixed
- WiFi
- User interface
- Gateway interface
- Bluetooth
- APP interface
- ETH interface optional
- Message basic types
- Broadcast
- Group Call
- Private Call
- Store & Forward
- Development and debug messages
- Open hardware
- The use of the compatible MCU should be observed
- ESP32
- Ready-made modules MCU, HF, GPS together
- such as TTGO, TLORA, HELTEC, ...
- Preferably structure base board, plug-in modules
- like RAK WisBlock
- Existing hardware from the LoRa-APRS project
- Semtech SX1262 LoRa transceiver or compatible
- ETH module block with IP stack for gateways
- Firmware
- Basic structure prepared for development in the group
- Easy to expand, maintain
- Clear functional structure
- No direct hardware reference in the logic structure
- Logic structure built with clear interfaces to incorporate functional extensions at any time without affecting the tested basic functionality
- What service does MeshCom 4.0 offer?
- Text transmission
- Position transmission (Smart Beaconing)
- Freely definable payload
- Feature List
- Configuration via USB serial interface
- Callsign with APRS-compliant SSID
- Frequency setting and display
- Field strength display (S-meter, RSSI, MER)
- LoRa modulation parameters also detailed
- Fix position
- Battery management stages
- Scan for available MeshCom channel
- Use Cases
- general amateur radio news service
- Emergency cat radio
- Information services
- Weather forecast
- SolarFlux
- Radioactivity
- Lightning detection
- DXCluster
- Phonics skeds, SOTA skeds
Design: Kurt OE1KBC
Discussion: TELEGRAM Group MeshCom, FORUM