sandeepmistry
LORA COMMUNICATION USING NANO
I'm working on lora communication using nano i m not receving the data and some times i'm receving the garabage values like:???????????? can you help me in this issue
thank you
Huh?
Please tell more about your setup, what are you using. How did you connect everything?
Which code are you using? The sender and receiver samples?
IM USING NANO AND LORA SX1278
SENDER CODE :
#include <SPI.h> #include <LoRa.h>
byte msgCount = 0; // Count of outgoing messages byte localAddress = 0xBB; // Address of this device byte destination = 0xFF; // Destination to send to long lastSendTime = 0; // Last send time int interval = 3000; // Interval between sends
/*
- Transmitter side Code
Module SX1278 // Arduino UNO/NANO
Vcc -> 3.3V
MISO -> D12
MOSI -> D11
SLCK -> D13
Nss -> D10
GND -> GND
*/
void setup() { Serial.begin(115200);
while (!Serial);
Serial.println("LoRa Sender");
if (!LoRa.begin(433E6)) { // or 915E6, the MHz speed of your module Serial.println("Starting LoRa failed!"); while (1); } }
void loop() {
String MyMessage = "Hello World";
LoRa.beginPacket();
LoRa.print(MyMessage);
LoRa.endPacket();
delay(300);
}
RECEIVER CODE :
#include <SPI.h> #include <LoRa.h>
byte data[50]; byte msgCount = 0; // Count of outgoing messages byte localAddress = 0xFF; // Address of this device byte destination = 0xBB; // Destination to send to long lastSendTime = 0; // Last send time int interval = 300; // Interval between sends
/* *** Receiver Side Code**
#include <SPI.h>
#include <LoRa.h>
String inString = ""; // string to hold incoming charaters
String MyMessage = ""; // Holds the complete message
void setup() { Serial.begin(115200);
while (!Serial); Serial.println("LoRa Receiver"); if (!LoRa.begin(433E6)) { // or 915E6 Serial.println("Starting LoRa failed!"); while (1); } }
void loop() {
// try to parse packet
int packetSize = LoRa.parsePacket();
if (packetSize) {
// read packet
while (LoRa.available())
{
int inChar = LoRa.read();
inString += (char)inChar;
MyMessage = inString;
}
inString = "";
LoRa.packetRssi();
}
Serial.println(MyMessage);
}
I'M Connecting the pins from sx`1278 to nano
and i'm providing the external power supply for lora
Module SX1278 // Arduino NANO Vcc -> 3.3V MISO -> D12 MOSI -> D11 SLCK -> D13 Nss -> D10 GND -> GND DI00 -> D2 RST -> RST
I'M using nano for both transmitter and receiver side
OUTPUT
Transmitter side :
LoRa Sender
receiver side :
S��LNcn��� S��LNcn��� S��LNcn��� S��LNcn��� S��LNcn��� S��LNcn��� S��LNcn��� S��LNcn��� S��LNcn��� S��LNcn��� S��LNcn��� S��LNcn��� S��LNcn��� S��LNcn��� S��LNcn��� S��LNcn��� S��LNcn��� S��LNcn��� S��LNcn��� S��LNcn��� S��LNcn��� S��LNcn��� S��LNcn��� S��LNcn��� S��LNcn��� S��LNcn���
Tomorrow I'll get those modules 😊
We might have very similar setups...
Can you show a picture of how you connected everything?
Another thing... why don't you print the RSSI of the received packet? That might help...
Connection are same as i said before |
Module SX1278 // Arduino NANO Vcc -> 3.3V MISO -> D12 MOSI -> D11 SLCK -> D13 Nss -> D10 GND -> GND DI00 -> D2 RST -> RST
vcc pin is connected to 3.3v nano board MISO pin is connected to D12 pin
I wanted to see how you did the physical connection in part to help and in part to see how to do it myself because that module I think that the holes do not align with a protoboard.
Can you take a closer picture of the connections to the module?
From this far away it seems as if the connections are wrong, for example I can't see where you connected the blue cable (GND).
the ground from nano is given to the GROUND LINE of the bread board and ground from the external 3.3v is connected to the bread board ground line and lora is also connected to same ground line
Have you checked continuity between the soldered cables?
I soldered cables to that module yesterday and it is a pain in the a**.
Perhaps there is a short circuit somewhere.
Hello, I was able to make it work.
But I'm using Arduino Pro Mini.
These are the connections:
ARDUINO --------- LoRa Module
GND <- NEGRO ---> GND
VCC <- ROJO ----> 3.3V
10 <- MARRON --> NSS
11 <- AZUL ----> MOSI
12 <- NARANJA -> MISO
13 <- BLANCO --> SCK
9 <- VIOLETA -> RST
2 <- VERDE ---> DIO0
The coil antenna seems to be pretty bad, -80dBm with two modules next to each other.
I get better reception with the modules Ra-02 and a cable as an antenna
and can you share the outputs and also print rssi value of received packet
Hello, I don't have an Arduino nano so that test is not possible for me...
Is it possible that Arduino nano uses 5V?
You should use 3,3V for the LoRa modules, they might work at 5V but long term they might be damaged by that voltage.
The RSSI I'm getting is -64dBm with the modules next to each other.
Connection are same as i said before |
Module SX1278 // Arduino NANO Vcc -> 3.3V MISO -> D12 MOSI -> D11 SLCK -> D13 Nss -> D10 GND -> GND DI00 -> D2 RST -> RST
vcc pin is connected to 3.3v nano board MISO pin is connected to D12 pin
I see you connected RST -> RST, shouldn't it go to D9?
i m using logic level converters between lora and nano but i m getting
LoRa Receiver Starting LoRa failed!
I took the code from here: https://iotprojectsideas.com/multiple-lora-nodes-communication-with-master-lora-node/
The output won't tell you much.
can you give me the voltage at every pins of lora at sender and receiver
I think you should better use a module like this:
So that you don't have issues with the soldering.
Most likely there is something wrong with the solder.