[SOLVED]CubeCell – Dev-Board Simple Receive Example

AmenoHD · April 2, 2020, 8:54am

Im searching 2 example sketches. One sketch for sending sensor data over lora and then a receiver sketch to receive the sensor data over lora. The sensor is the bme280. I found a sketch for sending, but not for receiving. Thank You in Advance

Quency-D · March 31, 2020, 3:11am

Can you post your code for a look?

AmenoHD · March 31, 2020, 7:58am

I got no code because i dont know how to use this library to write a receive script. The sender script is in the examples of the board.

Quency-D · April 1, 2020, 6:55am

If you need to use the standard loraWAN protocol, you need to purchase a gateway.

Supporter · April 1, 2020, 9:17am

This example include receiver example: https://github.com/HelTecAutomation/ASR650x-Arduino/blob/master/libraries/LoRa/examples/LoRaBasic/pingpong/pingpong.ino

Anyway, we will update another independent receiving example later.

AmenoHD · April 1, 2020, 9:27am

I just want to send data from a module to a other because there is no gateway near by.

When will you upload a independent receiving example? Thanks and have a nice day

Quency-D · April 2, 2020, 1:19am

Sorry I didn’t understand you correctly at the beginning.

Quency-D · April 2, 2020, 1:21am

/* Heltec Automation Ping Pong communication test example
*

Function:
1. Send data from a CubeCell device over hardware
this project also realess in GitHub:
https://github.com/HelTecAutomation/ASR650x-Arduino
*/

#include “LoRaWan_APP.h”
#include “Arduino.h”

/*

set LoraWan_RGB to 1,the RGB active in loraWan
RGB red means sending;
RGB green means received done;
*/
#ifndef LoraWan_RGB
#define LoraWan_RGB 0
#endif

#define RF_FREQUENCY 915000000 // Hz

#define TX_OUTPUT_POWER 14 // dBm

#define LORA_BANDWIDTH 0 // [0: 125 kHz,
// 1: 250 kHz,
// 2: 500 kHz,
// 3: Reserved]
#define LORA_SPREADING_FACTOR 7 // [SF7…SF12]
#define LORA_CODINGRATE 1 // [1: 4/5,
// 2: 4/6,
// 3: 4/7,
// 4: 4/8]
#define LORA_PREAMBLE_LENGTH 8 // Same for Tx and Rx
#define LORA_SYMBOL_TIMEOUT 0 // Symbols
#define LORA_FIX_LENGTH_PAYLOAD_ON false
#define LORA_IQ_INVERSION_ON false

#define RX_TIMEOUT_VALUE 1000
#define BUFFER_SIZE 30 // Define the payload size here

char txpacket[BUFFER_SIZE];
char rxpacket[BUFFER_SIZE];

static RadioEvents_t RadioEvents;

int16_t txNumber;

int16_t rssi,rxSize;

void setup() {
boardInitMcu( );
Serial.begin(115200);

txNumber=0;
rssi=0;

  RadioEvents.RxDone = OnRxDone;
Radio.Init( &RadioEvents );
Radio.SetChannel( RF_FREQUENCY );

Radio.SetRxConfig( MODEM_LORA, LORA_BANDWIDTH, LORA_SPREADING_FACTOR,
                               LORA_CODINGRATE, 0, LORA_PREAMBLE_LENGTH,
                               LORA_SYMBOL_TIMEOUT, LORA_FIX_LENGTH_PAYLOAD_ON,
                               0, true, 0, 0, LORA_IQ_INVERSION_ON, true );

turnOnRGB(COLOR_SEND,0); //change rgb color
Serial.println(“into RX mode”);
}

void loop()
{
Radio.Rx( 0 );
delay(500);
Radio.IrqProcess( );
}

void OnRxDone( uint8_t *payload, uint16_t size, int16_t rssi, int8_t snr )
{
rssi=rssi;
rxSize=size;
memcpy(rxpacket, payload, size );
rxpacket[size]=’\0’;
turnOnRGB(COLOR_RECEIVED,0);
Radio.Sleep( );
Serial.printf("\r\nreceived packet “%s” with rssi %d , length %d\r\n",rxpacket,rssi,rxSize);

}

AmenoHD · April 2, 2020, 1:39am

Thx a lot. Do you also got a send script with the bme 280 sensor ? Tried today to add it so the packet and send it but it was not working

Quency-D · April 2, 2020, 2:13am

I’m so sorry.I don’t have BMP280 , but you can reference this code.

And add the read data to the position in the picture, pay attention to the data type.

AmenoHD · April 2, 2020, 2:22am

Do you know the datatype for example for float tried it but there was no success

Quency-D · April 2, 2020, 5:27am

/* Heltec Automation Ping Pong communication test example
*

Function:
1. Send data from a CubeCell device over hardware
this project also realess in GitHub:
https://github.com/HelTecAutomation/ASR650x-Arduino
*/

#include “LoRaWan_APP.h”
#include “Arduino.h”

/*

set LoraWan_RGB to 1,the RGB active in loraWan
RGB red means sending;
RGB green means received done;
*/
#ifndef LoraWan_RGB
#define LoraWan_RGB 0
#endif

#define RF_FREQUENCY 915000000 // Hz

#define TX_OUTPUT_POWER 14 // dBm

#define LORA_BANDWIDTH 0 // [0: 125 kHz,
// 1: 250 kHz,
// 2: 500 kHz,
// 3: Reserved]
#define LORA_SPREADING_FACTOR 7 // [SF7…SF12]
#define LORA_CODINGRATE 1 // [1: 4/5,
// 2: 4/6,
// 3: 4/7,
// 4: 4/8]
#define LORA_PREAMBLE_LENGTH 8 // Same for Tx and Rx
#define LORA_SYMBOL_TIMEOUT 0 // Symbols
#define LORA_FIX_LENGTH_PAYLOAD_ON false
#define LORA_IQ_INVERSION_ON false

#define RX_TIMEOUT_VALUE 1000
#define BUFFER_SIZE 30 // Define the payload size here

char txpacket[BUFFER_SIZE];
char rxpacket[BUFFER_SIZE];

static RadioEvents_t RadioEvents;

double txNumber;

int16_t rssi,rxSize;
void DoubleToString( char *str, double double_num,unsigned int len);

void setup() {
boardInitMcu( );
Serial.begin(115200);

txNumber=0;
rssi=0;

Radio.Init( &RadioEvents );
Radio.SetChannel( RF_FREQUENCY );
Radio.SetTxConfig( MODEM_LORA, TX_OUTPUT_POWER, 0, LORA_BANDWIDTH,
                               LORA_SPREADING_FACTOR, LORA_CODINGRATE,
                               LORA_PREAMBLE_LENGTH, LORA_FIX_LENGTH_PAYLOAD_ON,
                               true, 0, 0, LORA_IQ_INVERSION_ON, 3000 );

}

void loop()
{
delay(1000);
txNumber += 0.01;
sprintf(txpacket,"%s",“Hello world number”); //start a package
// sprintf(txpacket+strlen(txpacket),"%d",txNumber); //add to the end of package

DoubleToString(txpacket,txNumber,3);	   //add to the end of package

turnOnRGB(COLOR_SEND,0); //change rgb color

Serial.printf("\r\nsending packet \"%s\" , length %d\r\n",txpacket, strlen(txpacket));

Radio.Send( (uint8_t *)txpacket, strlen(txpacket) ); //send the package out

}

/**

@brief Double To String
@param str: Array or pointer for storing strings
@param double_num: Number to be converted
@param len: Fractional length to keep
@retval None
*/
void DoubleToString( char *str, double double_num,unsigned int len) {
double fractpart, intpart;
fractpart = modf(double_num, &intpart);
fractpart = fractpart * (pow(10,len));
sprintf(str + strlen(str),"%d", (int)(intpart)); //Integer part
sprintf(str + strlen(str), “.%d”, (int)(fractpart)); //Decimal part
}

Quency-D · April 2, 2020, 5:29am

You can try this code.

Supporter · April 2, 2020, 6:52am

github.com

HelTecAutomation/ASR650x-Arduino/blob/master/libraries/LoRa/examples/LoRaBasic/LoRaReceiver/LoRaReceiver.ino

/* Heltec Automation Receive communication test example
 *
 * Function:
 * 1. Receive the same frequency band lora signal program
 * 
 * 
 * this project also realess in GitHub:
 * https://github.com/HelTecAutomation/ASR650x-Arduino
 * */

#include "LoRaWan_APP.h"
#include "Arduino.h"

/*
 * set LoraWan_RGB to 1,the RGB active in loraWan
 * RGB red means sending;
 * RGB green means received done;
 */
#ifndef LoraWan_RGB
#define LoraWan_RGB 0

This file has been truncated. show original

AmenoHD · April 2, 2020, 8:50am

Thanks a lot for the help

AmenoHD · April 2, 2020, 10:01am

i got a problem, it sends two times the right data and then stops and does nothing. It does that when i try to send sensor data, with the 0.01 it works

AmenoHD · April 2, 2020, 10:22am

    /* Heltec Automation Ping Pong communication test example
*

Function:
Send data from a CubeCell device over hardware
this project also realess in GitHub:
https://github.com/HelTecAutomation/ASR650x-Arduino
*/
#include <LoRaWan_APP.h>
#include <Arduino.h>
#include "Seeed_BME280.h"
#include <Wire.h>

BME280 bme280;



/*

set LoraWan_RGB to 1,the RGB active in loraWan
RGB red means sending;
RGB green means received done;
*/
#ifndef LoraWan_RGB
#define LoraWan_RGB 0
#endif
#define RF_FREQUENCY 868000000 // Hz

#define TX_OUTPUT_POWER 14 // dBm

#define LORA_BANDWIDTH 0 // [0: 125 kHz,
// 1: 250 kHz,
// 2: 500 kHz,
// 3: Reserved]
#define LORA_SPREADING_FACTOR 9 // [SF7…SF12]
#define LORA_CODINGRATE 1 // [1: 4/5,
// 2: 4/6,
// 3: 4/7,
// 4: 4/8]
#define LORA_PREAMBLE_LENGTH 8 // Same for Tx and Rx
#define LORA_SYMBOL_TIMEOUT 0 // Symbols
#define LORA_FIX_LENGTH_PAYLOAD_ON false
#define LORA_IQ_INVERSION_ON false

#define RX_TIMEOUT_VALUE 1000
#define BUFFER_SIZE 30 // Define the payload size here

char txpacket[BUFFER_SIZE];
char rxpacket[BUFFER_SIZE];

static RadioEvents_t RadioEvents;

double txNumber;

int16_t rssi,rxSize;
void DoubleToString( char *str, double double_num,unsigned int len);

void setup() {
boardInitMcu( );
Serial.begin(115200);

txNumber=0;
rssi=0;

Radio.Init( &RadioEvents );
Radio.SetChannel( RF_FREQUENCY );
Radio.SetTxConfig( MODEM_LORA, TX_OUTPUT_POWER, 0, LORA_BANDWIDTH,
                               LORA_SPREADING_FACTOR, LORA_CODINGRATE,
                               LORA_PREAMBLE_LENGTH, LORA_FIX_LENGTH_PAYLOAD_ON,
                               true, 0, 0, LORA_IQ_INVERSION_ON, 3000 ); 
 pinMode(Vext, OUTPUT);
  digitalWrite(Vext, LOW);
  delay(500);
  if(!bme280.init()){
    Serial.println("Device error!");
  }

                               
}

void loop()
{
  //float temp = bme280.getTemperature();
delay(1000);

txNumber = 0.01;
sprintf(txpacket,"%s","Hello world number"); //start a package
// sprintf(txpacket+strlen(txpacket),"%d",txNumber); //add to the end of package

DoubleToString(txpacket,txNumber,2);     //add to the end of package

turnOnRGB(COLOR_SEND,0); //change rgb color

Serial.printf("\r\nsending packet \"%s\" , length %d\r\n",txpacket, strlen(txpacket));

Radio.Send( (uint8_t *)txpacket, strlen(txpacket) ); //send the package out 
turnOffRGB();
}

/**

@brief Double To String
@param str: Array or pointer for storing strings
@param double_num: Number to be converted
@param len: Fractional length to keep
@retval None
*/
void DoubleToString( char *str, double double_num,unsigned int len) {
double fractpart, intpart;
fractpart = modf(double_num, &intpart);
fractpart = fractpart * (pow(10,len));
sprintf(str + strlen(str),"%d", (int)(intpart)); //Integer part
sprintf(str + strlen(str), ".%d", (int)(fractpart)); //Decimal part
}

Supporter · April 3, 2020, 5:41am

Recommend do basic node-to-node communication test first. that will help you verify if there have any hardware problem.

Then add your function step by step.