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LoRa Sender and Receiver :SX1278 LoRa ESP32 WiFi Bluetooth 0.96″ OLED Display Kit

LoRa Sender

#include <SPI.h>
#include <LoRa.h>
#include “SSD1306.h”
#include<Arduino.h>

//OLED pins to ESP32 GPIOs via this connecthin:
//OLED_SDA — GPIO4
//OLED_SCL — GPIO15
//OLED_RST — GPIO16

SSD1306 display(0x3c, 4, 15);

 

// WIFI_LoRa_32 ports

// GPIO5 — SX1278’s SCK
// GPIO19 — SX1278’s MISO
// GPIO27 — SX1278’s MOSI
// GPIO18 — SX1278’s CS
// GPIO14 — SX1278’s RESET
// GPIO26 — SX1278’s IRQ(Interrupt Request)

#define SS 18
#define RST 14
#define DI0 26
#define BAND 433E6 //915E6

int counter = 0;

void setup() {
pinMode(25,OUTPUT); //Send success, LED will bright 1 second

pinMode(16,OUTPUT);
digitalWrite(16, LOW); // set GPIO16 low to reset OLED
delay(50);
digitalWrite(16, HIGH);

Serial.begin(115200);
while (!Serial); //If just the the basic function, must connect to a computer

// Initialising the UI will init the display too.
display.init();
display.flipScreenVertically();
display.setFont(ArialMT_Plain_10);
display.setTextAlignment(TEXT_ALIGN_LEFT);
display.drawString(5,5,”LoRa Sender”);
display.display();

SPI.begin(5,19,27,18);
LoRa.setPins(SS,RST,DI0);
Serial.println(“LoRa Sender”);
if (!LoRa.begin(BAND)) {
Serial.println(“Starting LoRa failed!”);
while (1);
}
Serial.println(“LoRa Initial OK!”);
display.drawString(5,20,”LoRa Initializing OK!”);
display.display();
delay(2000);
}

void loop() {
Serial.print(“Sending packet: “);
Serial.println(counter);

display.clear();
display.setFont(ArialMT_Plain_16);
display.drawString(3, 5, “Sending packet “);
display.drawString(50, 30, String(counter));
display.display();

// send packet
LoRa.beginPacket();
LoRa.print(“Hello..”);
LoRa.print(counter);
LoRa.endPacket();

counter++;
digitalWrite(25, HIGH); // turn the LED on (HIGH is the voltage level)
delay(1000); // wait for a second
digitalWrite(25, LOW); // turn the LED off by making the voltage LOW
delay(1000); // wait for a second

delay(3000);
}

LoRa Receiver

#include <SPI.h>
#include <LoRa.h>
#include “SSD1306.h”

SSD1306 display(0x3c, 4, 15);

//OLED pins to ESP32 GPIOs via this connection:
//OLED_SDA — GPIO4
//OLED_SCL — GPIO15
//OLED_RST — GPIO16

 

// WIFI_LoRa_32 ports

// GPIO5 — SX1278’s SCK
// GPIO19 — SX1278’s MISO
// GPIO27 — SX1278’s MOSI
// GPIO18 — SX1278’s CS
// GPIO14 — SX1278’s RESET
// GPIO26 — SX1278’s IRQ(Interrupt Request)

#define SS 18
#define RST 14
#define DI0 26
#define BAND 433E6

 

void setup() {
pinMode(16,OUTPUT);
digitalWrite(16, LOW); // set GPIO16 low to reset OLED
delay(50);
digitalWrite(16, HIGH);

display.init();
display.flipScreenVertically();
display.setFont(ArialMT_Plain_10);
display.setTextAlignment(TEXT_ALIGN_LEFT);

Serial.begin(115200);
while (!Serial); //if just the the basic function, must connect to a computer
delay(1000);

Serial.println(“LoRa Receiver”);
display.drawString(5,5,”LoRa Receiver”);
display.display();
SPI.begin(5,19,27,18);
LoRa.setPins(SS,RST,DI0);

if (!LoRa.begin(BAND)) {
display.drawString(5,25,”Starting LoRa failed!”);
while (1);
}
Serial.println(“LoRa Initial OK!”);
display.drawString(5,25,”LoRa Initializing OK!”);
display.display();
}

void loop() {
// try to parse packet
int packetSize = LoRa.parsePacket();
if (packetSize) {
// received a packets
Serial.print(“Received packet. “);

display.clear();
display.setFont(ArialMT_Plain_16);
display.drawString(3, 0, “Received packet “);
display.display();

// read packet
while (LoRa.available()) {
String data = LoRa.readString();
Serial.print(data);
display.drawString(20,22, data);
display.display();
}

// print RSSI of packet
Serial.print(” with RSSI “);
Serial.println(LoRa.packetRssi());
display.drawString(20, 45, “RSSI: “);
display.drawString(70, 45, (String)LoRa.packetRssi());
display.display();
}
}