Introduction:
LoRaMesh is a protocol that utilizes LoRa technology to create a mesh network. In this project, we will use ESP32 as network nodes to establish a robust and decentralized communication infrastructure in the Nostr network.
Initial Setup:
Begin by configuring the development environment. Make sure to have the LoRa library installed in the Arduino IDE and ESP32 boards configured.
Constants Definition:
#include <LoRa.h>
#define NODE_ID 1
#define NOSTR_NETWORK_ID 123
Here, we define a unique identifier for each node (NODE_ID) and an identifier for the Nostr network (NOSTR_NETWORK_ID).
Packet Structure:
struct NostrPacket {
uint8_t destination;
uint8_t origin;
uint8_t data[256];
};
This structure represents a packet in the Nostr network, containing information about the destination, origin, and payload data.
LoRa Configuration:
void setup() {
Serial.begin(115200);
if (!LoRa.begin(868E6)) {
Serial.println("LoRa initialization failed. Check your wiring.");
while (1);
}
}
We initialize serial communication for debugging and configure the LoRa module at the 868MHz frequency.
Packet Sending Function:
void sendPacket(NostrPacket &packet) {
LoRa.beginPacket();
LoRa.write((uint8_t *)&packet, sizeof(NostrPacket));
LoRa.endPacket();
}
This function sends a packet using LoRa. It converts the packet structure into bytes and sends it to the network.
Main Loop:
void loop() {
NostrPacket receivedPacket;
if (LoRa.parsePacket()) {
int packetSize = LoRa.readBytes((char *)&receivedPacket, sizeof(NostrPacket));
if (packetSize == sizeof(NostrPacket) && receivedPacket.destination == NODE_ID) {
// Process received packet
Serial.print("Received from Node ");
Serial.print(receivedPacket.origin);
Serial.print(": ");
Serial.println((char *)receivedPacket.data);
}
}
// Simulate sending a packet to Node 2
if (millis() % 10000 == 0) {
NostrPacket packetToSend;
packetToSend.destination = 2;
packetToSend.origin = NODE_ID;
strcpy((char *)packetToSend.data, "Hello, Node 2!");
sendPacket(packetToSend);
}
}
The main loop checks for received packets and processes them if they are destined for the current node. It also simulates periodically sending a packet to Node 2.
Conclusion:
This is a basic sketch to create a LoRaMesh node using ESP32 in the Nostr network. Keep in mind that more robust projects will require deeper considerations, such as efficient routing, security, and power management for battery-powered devices. This project serves as a starting point to explore the potential of LoRa technology in decentralized mesh networks.