ok guys just a little update
i received my lora modules today and i got a pretty good range (600m) out of them without having to change anything. (it was not line of sight)
But since you guys sayed that i could achieve a lot more range i would like to know what i could change to increase the range.
Are there some settings i can adjust in the code?
Receiver:
#include <SPI.h>
#include <LoRa.h>
#include <Wire.h>
#include "SSD1306.h"
#include "images.h"
#define SCK 5 // GPIO5 -- SX1278's SCK
#define MISO 19 // GPIO19 -- SX1278's MISO
#define MOSI 27 // GPIO27 -- SX1278's MOSI
#define SS 18 // GPIO18 -- SX1278's CS
#define RST 14 // GPIO14 -- SX1278's RESET
#define DI0 26 // GPIO26 -- SX1278's IRQ(Interrupt Request)
#define BAND 433E6
SSD1306 display(0x3c, 21, 22);
String rssi = "RSSI --";
String packSize = "--";
String packet ;
int counter = 0;
String tmp;
void loraData(){
display.clear();
display.setTextAlignment(TEXT_ALIGN_LEFT);
display.setFont(ArialMT_Plain_10);
display.drawString(0 , 15 , "Received "+ packSize + " bytes");
display.drawStringMaxWidth(0 , 26 , 128, packet);
display.drawString(0, 0, rssi);
tmp = String(counter, BIN);
while(tmp.length() < 21)
{
tmp = "0" + tmp;
}
if(packet == tmp)
{
display.drawStringMaxWidth(0 , 37 , 128, "Package received");
}else
{
display.drawStringMaxWidth(0 , 37 , 128, "Receiving failed");
}
display.display();
counter++;
}
void cbk(int packetSize) {
packet ="";
packSize = String(packetSize,DEC);
for (int i = 0; i < packetSize; i++) { packet += (char) LoRa.read(); }
rssi = "RSSI " + String(LoRa.packetRssi(), DEC) ;
loraData();
}
void setup() {
pinMode(16,OUTPUT);
digitalWrite(16, LOW); // set GPIO16 low to reset OLED
delay(50);
digitalWrite(16, HIGH); // while OLED is running, must set GPIO16 in high、
Serial.begin(9600);
while (!Serial);
Serial.println();
Serial.println("LoRa Receiver Callback");
SPI.begin(SCK,MISO,MOSI,SS);
LoRa.setPins(SS,RST,DI0);
if (!LoRa.begin(433E6)) {
Serial.println("Starting LoRa failed!");
while (1);
}
//LoRa.onReceive(cbk);
LoRa.receive();
Serial.println("init ok");
display.init();
display.flipScreenVertically();
display.setFont(ArialMT_Plain_10);
display.drawString(0 , 15 , "Received "+ packSize + " bytes");
display.display();
delay(1500);
}
void loop() {
int packetSize = LoRa.parsePacket();
if (packetSize) { cbk(packetSize); }
delay(10);
}
Sender:
#include <SPI.h>
#include <LoRa.h>
#include <Wire.h>
#include "SSD1306.h"
#include "images.h"
#define SCK 5 // GPIO5 -- SX1278's SCK
#define MISO 19 // GPIO19 -- SX1278's MISO
#define MOSI 27 // GPIO27 -- SX1278's MOSI
#define SS 18 // GPIO18 -- SX1278's CS
#define RST 14 // GPIO14 -- SX1278's RESET
#define DI0 26 // GPIO26 -- SX1278's IRQ(Interrupt Request)
#define BAND 433E6
unsigned int counter = 0;
SSD1306 display(0x3c, 21, 22);
String rssi = "RSSI --";
String packSize = "--";
String packet ;
String tmp;
void setup() {
pinMode(16,OUTPUT);
pinMode(25,OUTPUT);
digitalWrite(16, LOW); // set GPIO16 low to reset OLED
delay(50);
digitalWrite(16, HIGH); // while OLED is running, must set GPIO16 in high
Serial.begin(9600);
while (!Serial);
Serial.println();
Serial.println("LoRa Sender Test");
SPI.begin(SCK,MISO,MOSI,SS);
LoRa.setPins(SS,RST,DI0);
if (!LoRa.begin(433E6)) {
Serial.println("Starting LoRa failed!");
while (1);
}
//LoRa.onReceive(cbk);
// LoRa.receive();
Serial.println("init ok");
display.init();
display.flipScreenVertically();
display.setFont(ArialMT_Plain_10);
display.drawString(0, 0, "Sending packet: ");
display.display();
delay(1500);
}
void loop() {
display.clear();
display.setTextAlignment(TEXT_ALIGN_LEFT);
display.setFont(ArialMT_Plain_10);
display.drawString(0, 0, "Sending packet: ");
display.drawString(90, 0, String(counter));
display.display();
// send packetF,
tmp = String(counter, BIN);
while(tmp.length() < 21)
{
tmp = "0" + tmp;
}
LoRa.beginPacket();
LoRa.print(tmp);
LoRa.endPacket();
Serial.println("Package Send");
Serial.println(tmp);
counter++;
delay(500); // wait for a second
}
and what kind of antenna would you recommend?
Regards
Julian
Edit:
I am currently working on a custom PCB. Has anyone done that before and can recommend a LORA module?
