When running this code on my arduino mega 2560 it shows starting the lora fails, and I can't understand why. I have also tried with an Uno and another module, same thing. My module is 433Hz and I have it connected to 3.3V, my pin connections are-
MISO - 50
Does anyone know what I'm doing wrong? Thanks in advance
#include <SPI.h>
#include <LoRa.h>
void setup() {
Serial.begin(9600);
#include <SPI.h>
#include <LoRa.h>
int counter = 0;
void setup() {
Serial.begin(9600);
while (!Serial);
Serial.println("LoRa Sender");
if (!LoRa.begin(433E6)) {
Serial.println("Starting LoRa failed!");
while (1);
}
}
void loop() {
Serial.print("Sending packet: ");
Serial.println(counter);
LoRa.beginPacket();
LoRa.print("hello ");
LoRa.print(counter);
LoRa.endPacket();
counter++;
delay(5000);
}
Oops.
How does that even compile, much less run?
oh lol, sorry about that I must have copied it wrong
Post a link to the radio module.
Unless it has built in 5V to 3.3V logic level shifters, you will destroy it by connecting it to the SPI port of a 5V Arduino.
Also check that the 3.3V output can handle the required transmit current.
So, copy exactly what you have.
srnet
March 24, 2023, 9:24pm
6
The Mega 2560 use 5V logic levels.
The RA-02 using 3.3V logic levels.
You need to use logic level conversion between the Meag 2560 and the RA-02.
Dont connect the Mega 2560 direct to the RA-02, you can destroy the RA-02.
#include <SPI.h>
#include <LoRa.h>
int counter = 0;
void setup() {
Serial.begin(9600);
while (!Serial);
Serial.println("LoRa Sender");
if (!LoRa.begin(433E6)) {
Serial.println("Starting LoRa failed!");
while (1);
}
}
void loop() {
Serial.print("Sending packet: ");
Serial.println(counter);
LoRa.beginPacket();
LoRa.print("hello ");
LoRa.print(counter);
LoRa.endPacket();
counter++;
delay(5000);
}
Oh so I need a logic level shifter, thanks everyone.
Hi, @cryotene
If a module can you please post link to data/specs?
If you made a PCB can you post EXPORTED jpg images of the PCB?
Thanks.. Tom...
system
September 21, 2023, 12:54pm
11
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