I’m struggling to get a CubeCell sending messages to a WiFi Lora 32 V2.1 board over a private LoRa network.
I run a receiver on a Heltec Wifi Lora 32 V2 board. It receives messages from other Wifi Lora boards just fine. Recently, I got a CubeCell (HTCC-AB01) board had no success yet to send any message to the receiver.
The receiver is set up using the following code - slightly adapted from the OLED Receiver Example:
#include “heltec.h”
#include “images.h”
#define BAND 868E6 //you can set band here directly,e.g. 868E6,915E6
String rssi = “RSSI --”;
String packSize = “–”;
char packet[13] ;
byte rec_buf[256];
int packetSize = 0;
void logo(){
Heltec.display->clear();
Heltec.display->drawXbm(0,5,logo_width,logo_height,logo_bits);
Heltec.display->display();
}
void LoRaData(){
Heltec.display->clear();
Heltec.display->setTextAlignment(TEXT_ALIGN_LEFT);
Heltec.display->setFont(ArialMT_Plain_10);
Heltec.display->drawString(0 , 15 , "Received “+ String(packetSize) + " bytes”);
sprintf(packet, “%02X%02X%02X%02X%02X%02X”, rec_buf[8], rec_buf[7], rec_buf[6], rec_buf[5], rec_buf[4], rec_buf[3]);
Heltec.display->drawStringMaxWidth(0 , 26 , 128, packet);
Heltec.display->drawString(0, 0, rssi);
Heltec.display->display();
}
void cbk(int packetSize) {
Serial.println(“Incoming Package”);
for (int i = 0; i < packetSize; i++) { rec_buf[i] = LoRa.read(); }
rssi = "RSSI " + String(LoRa.packetRssi(), DEC) ;
packet == " ";
LoRaData();
}
void setup() {
//WIFI Kit series V1 not support Vext control
Heltec.begin(true /DisplayEnable Enable/, true /Heltec.Heltec.Heltec.LoRa Disable/, true /Serial Enable/, true /PABOOST Enable/, BAND /long BAND/);
Heltec.display->init();
Heltec.display->flipScreenVertically();
Heltec.display->setFont(ArialMT_Plain_10);
logo();
delay(1500);
Heltec.display->clear();
Heltec.display->drawString(0, 0, “Heltec.LoRa Initial success!”);
Heltec.display->drawString(0, 10, “Wait for incoming data…”);
Heltec.display->display();
delay(1000);
LoRa.setSyncWord(0x12);
// LoRa.onReceive(cbk);
LoRa.receive();
// LoRa.dumpRegisters(Serial);
}
void loop() {
packetSize = LoRa.parsePacket();
if (packetSize) { cbk(packetSize); }
delay(10);
}
Messages from a Wifi Lora 32 V2 board are received and the result shows on the OLED screen.
When I setup a CubeCell Sender with the out-of-the box example code LoRaSender.ino
with the frequency and Spreadingfactor adapted to the Wifi Lora board, no message will get through from the CubeCell. I played around with the SyncWord, too, with no success.
Can anyone give me a hint what I can do that the CubeCelll message is received on the Wifi LoRa 32 board ?
CubeCell Code is:
#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 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 11 // [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() {
Serial.begin(115200);
txNumber=0;
rssi=0;
Radio.SetSyncWord(0x1424);
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()
{
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
delay(100);
turnOnRGB(0,0); //change rgb color
delay(10000);
}
/**
- @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
}