Code that recieves data from websockets and forwards over LoRa

sketch_nov05b_heltec_esp32_transmit_w_websockets.ino

/* Heltec Automation send 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 <ESP32_LoRaWAN.h>
#include "Arduino.h"

#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                                 200 // Define the payload size here

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

static RadioEvents_t RadioEvents;
void OnTxDone( void );
void OnTxTimeout( void );

int16_t txNumber;

int16_t rssi,rxSize;

uint32_t  license[4] = {0xE43F317B, 0x48CAC77E, 0xC8891C04, 0xB77AFA9C};

/* Heltec Automation send 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 "Arduino.h"
#include <WiFi.h>
#include <WebSocketClient.h>

boolean handshakeFailed=0;
String data = "";
char databuf[BUFFER_SIZE];

char path[] = "/";   //identifier of this device

const char* ssid     = "ssid";
const char* password = "password";
char* host = "10.0.0.5";  //replace this ip address with the ip address of your Node.Js server
const int espport= 3000;
  
WebSocketClient webSocketClient;
unsigned long previousMillis = 0;
unsigned long currentMillis;
unsigned long interval=300; //interval for sending data to the websocket server in ms

// Use WiFiClient class to create TCP connections
WiFiClient client;

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

    while (!Serial);
    SPI.begin(SCK,MISO,MOSI,SS);
    Mcu.init(SS,RST_LoRa,DIO0,DIO1,license);

    txNumber=0;
    rssi=0;

    RadioEvents.TxDone = OnTxDone;
    RadioEvents.TxTimeout = OnTxTimeout;

    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 ); 
  
  delay(10);

  // We start by connecting to a WiFi network

  Serial.println();
  Serial.println();
  Serial.print("Connecting to ");
  Serial.println(ssid);
  
  WiFi.begin(ssid, password);
  
  while (WiFi.status() != WL_CONNECTED) {
    delay(500);
    Serial.print(".");
  }

  Serial.println("");
  Serial.println("WiFi connected");  
  Serial.println("IP address: ");
  Serial.println(WiFi.localIP());

  delay(1000);
  
  wsconnect();
  //  wifi_set_sleep_type(LIGHT_SLEEP_T);
}


void loop() {

  delay(1000);



  Serial.println("hello");
  if (client.connected()) {
    webSocketClient.getData(data); 
    Serial.println("I am a connected client");   
    Serial.println(data);

    data.toCharArray(databuf, BUFFER_SIZE);

      txNumber++;
      sprintf(txpacket,"%s",databuf);
      /*
      sprintf(txpacket+strlen(txpacket),"%d",txNumber);
      sprintf(txpacket+strlen(txpacket),"%s"," Rssi : ");
      sprintf(txpacket+strlen(txpacket),"%d",rssi);  */

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

      Radio.Send( (uint8_t *)txpacket, strlen(txpacket) ); //send the package out 
      
    if (data.length() > 0) {
      Serial.println(data);
    }
  }
}


//*********************************************************************************************************************
//***************function definitions**********************************************************************************
void wsconnect(){
  // Connect to the websocket server
  if (client.connect(host, espport)) {
    Serial.println("Connected");
  } else {
    Serial.println("Connection failed.");
      delay(1000);  
   
   if(handshakeFailed){
    handshakeFailed=0;
    ESP.restart();
    }
    handshakeFailed=1;
  }

  // Handshake with the server
  webSocketClient.path = path;
  webSocketClient.host = host;
  if (webSocketClient.handshake(client)) {
    Serial.println("Handshake successful");
  } else {
    
    Serial.println("Handshake failed.");
   delay(4000);  
   
   if(handshakeFailed){
    handshakeFailed=0;
    ESP.restart();
    }
    handshakeFailed=1;
  }
}

void OnTxDone( void )
{
  Serial.print("TX done......");
}

void OnTxTimeout( void )
{
    Radio.Sleep( );
    Serial.print("TX Timeout......");
}