p2plink

LoRa network layer for Peer to Peer messaging and command delivering

Requirements:

• libmosquitto-dev
• uuid-dev
• libssl-dev

Features

• Receiver and Transmitter functionality
• UART LoRa interface
• Error detection with embedded checksum
• OpenSSL EVP based encryption
• Message acknowledgement
• MQTT message forwarding

System Diagram

Raspberry Pi 4 Model B + Sony IMX708 (Rpi Camera Module 3) + Ebyte E32-868T20D

Ebyte E32-868T30D <--> Raspberry Pi Pinout

Examples:

Send JSON message using serial0 interface:

./lrd -t /dev/serial0 -s "message"

Encrypt and send JSON message:

./lrd -t /dev/serial0 -e -s "message"

Receive JSON message using ttyUSB0 interface:

./lrd -t /dev/ttyUSB0 -r

Receive encrypted JSON message:

./lrd -t /dev/ttyUSB0 -e -r

Receive broadcasted messages from MQTT:

mosquitto_sub -h hostname -u username -P password -t "lrdlink"