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November 3, 2021 16:08
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This is the Heltec ESP32 LoRa gateway sketch
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/* 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" | |
#include <WiFi.h> | |
#include <WebSocketClient.h> | |
// #include "heltec.h" | |
#include "images.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]; | |
char dummypacket[BUFFER_SIZE]; | |
static RadioEvents_t RadioEvents; | |
void OnRxDone( uint8_t *payload, uint16_t size, int16_t rssi, int8_t snr ); | |
int16_t txNumber; | |
int16_t Rssi,rxSize; | |
uint32_t license[4] = {0xE43F317B, 0x48CAC77E, 0xC8891C04, 0xB77AFA9C}; | |
boolean handshakeFailed=0; | |
String data= ""; | |
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 LoraAndOLEDdisplaySetup() { | |
Display.init(); | |
delay(1500); | |
Display.clear(); | |
Display.drawString(0, 0, "Heltec.LoRa Initial success!"); | |
Display.drawString(0,10, "Wait for incoming data..."); | |
Display.display(); | |
delay(1000); | |
} | |
// Heltec Logo | |
void logo() { | |
Display.clear(); | |
Display.drawXbm(0,5,logo_width,logo_height,(const unsigned char *)logo_bits); | |
Display.display(); | |
} | |
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.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 ); | |
// recieve LoRa Data and Setup Display | |
LoraAndOLEDdisplaySetup(); | |
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() { | |
Radio.Rx( 0 ); | |
delay(500); | |
Radio.IrqProcess( ); | |
printf("\r\n dummy packet \"%s\" \r\n",dummypacket); | |
printf("\r\n the rx packet \"%s\" \r\n",rxpacket); | |
Display.clear(); | |
Display.drawString(0,50,"Packet" + String(txNumber,DEC) + " sent done"); | |
Display.drawString(0,0,"Received Size" + String(rxSize,DEC) + " packages:"); | |
Display.drawString(0,15,rxpacket); | |
Display.drawString(0,30,"With rssi " + String(Rssi,DEC)); | |
Display.display(); | |
if (client.connected()) { | |
webSocketClient.getData(data); | |
if (data.length() > 0) { | |
Serial.println(data); | |
} | |
webSocketClient.sendData(rxpacket); | |
} | |
/* | |
if (client.connected()) { | |
currentMillis=millis(); | |
webSocketClient.getData(data); | |
if (data.length() > 0) { | |
Serial.println(data); | |
//*************send log data to server in certain interval************************************ | |
//currentMillis=millis(); | |
if (abs(currentMillis - previousMillis) >= interval) { | |
previousMillis = currentMillis; | |
data= random(0,1001); | |
//For this project we are pretending that these random values are sensor values | |
//webSocketClient.sendData(data);//send sensor data to websocket server | |
// try to send the sensor data instead | |
// webSocketClient.sendData(packet); | |
} | |
} | |
else{ | |
} | |
delay(5); | |
} | |
*/ | |
} | |
//********************************************************************************************************************* | |
//***************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 OnRxDone( uint8_t *payload, uint16_t size, int16_t rssi, int8_t snr ) | |
{ | |
Rssi=rssi; | |
rxSize=size; | |
memcpy(rxpacket, payload, size ); | |
rxpacket[size]='\0'; | |
Radio.Sleep( ); | |
Serial.printf("\r\nreceived packet \"%s\" with Rssi %d , length %d\r\n",rxpacket,Rssi,rxSize); | |
Serial.println("wait to send next packet"); | |
// clear the dummy packet array here... | |
memset(&dummypacket[0], 0, sizeof(dummypacket)); | |
strncpy(dummypacket,rxpacket,BUFFER_SIZE); | |
} |
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