Example Code for Arduino-LCD_OTAA

Hardware Preparation

• DFR0994 Romeo ESP32-S3 x 1
• LoRaWAN Indoor Gateway (868MHz Version) or LoRaWAN Indoor Gateway (915MHz Version) x1

Software Preparation

• Download Arduino IDE: Click to download Arduino IDE
• Add ESP32 board to Arduino IDE
• Please install the DFRobot_LoRaWAN_ESP32S3 library before use.
• About how to install the library?

Note:

• LoRaWAN protocol stack version: 1.0.3
• You need to set the data parsing format to "text" on the gateway.

Sample Code

#include "DFRobot_LoRaWAN.h"

LCD_OnBoard screen;

#define BG_COLOR        COLOR_RGB565_BLACK      // Screen background color
#define TEXT_COLOR      COLOR_RGB565_GREEN      // Screen font color

#define TEXT_FONT       &FreeMono9pt7b          // font
#define TEXT_SIZE       1                       // Screen font size
#define LINE_HEIGHT     18                      // Line height
#define POX_X           0                       // Screen print position X coordinate
#define POX_Y           15                      // Screen print position Y coordinate
#define LINE_1          0                       // Line number
#define LINE_2          1
#define LINE_3          2
#define LINE_4          3

#define APP_INTERVAL_MS 10000

const uint8_t DevEUI[8] = {0xDF, 0x11, 0x11, 0x11, 0x11, 0x11, 0x11, 0x11};
const uint8_t AppEUI[8] = {0xDF, 0xB7, 0xB7, 0xB7, 0xB7, 0x00, 0x00, 0x00};
const uint8_t AppKey[16] = {
    0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 
    0x09, 0x0A, 0x0B, 0x0C, 0x0D, 0x0E, 0x0F, 0x10};

uint8_t buffer[255];
uint8_t port = 2;
uint32_t counter = 0;

LoRaWAN_Node node(DevEUI, AppEUI, AppKey, CLASS_A);
TimerEvent_t appTimer;

void joinCb(bool isOk, int16_t rssi, int8_t snr)
{
    screen.fillScreen(BG_COLOR);    
    screen.setTextColor(TEXT_COLOR);
    screen.setFont(TEXT_FONT);
    screen.setTextSize(TEXT_SIZE);

    if(isOk){
        screen.setCursor(POX_X, POX_Y + LINE_HEIGHT * LINE_1);
        screen.printf("JOIN SUCCESS");
        screen.setCursor(POX_X, POX_Y + LINE_HEIGHT * LINE_2);
        screen.printf("Accept Packet");
        screen.setCursor(POX_X, POX_Y + LINE_HEIGHT * LINE_3);
        screen.printf("Rssi = %d", rssi);
        screen.setCursor(POX_X, POX_Y + LINE_HEIGHT * LINE_4);
        screen.printf("Snr = %d", snr);

        TimerSetValue(&appTimer, APP_INTERVAL_MS);
        TimerStart(&appTimer);
    }else{
        screen.setCursor(POX_X, POX_Y + LINE_HEIGHT * LINE_1);
        screen.printf("OTAA join Err!");

        delay(5000);
        screen.fillScreen(BG_COLOR);    
        screen.setTextColor(TEXT_COLOR);
        screen.setFont(TEXT_FONT);
        screen.setTextSize(TEXT_SIZE);
        screen.setCursor(POX_X, POX_Y + LINE_HEIGHT * LINE_1);
        screen.printf("Restart");
        screen.setCursor(POX_X, POX_Y + LINE_HEIGHT * LINE_2);
        screen.printf("Join Request");
        screen.setCursor(POX_X, POX_Y + LINE_HEIGHT * LINE_3);
        screen.printf("Packet");
        node.join(joinCb);           // Rejoin the LoRaWAN network
    }
}

void userSendUnConfirmedPacket(void)
{
    TimerSetValue(&appTimer, APP_INTERVAL_MS);
    TimerStart(&appTimer);

    const char * data = "DFRobot"; 
    uint32_t datalen = strlen(data);
    memcpy(buffer, data, datalen);
    node.sendUnconfirmedPacket(port, buffer, /*size=*/datalen);

    screen.fillScreen(BG_COLOR);    
    screen.setTextColor(TEXT_COLOR);
    screen.setFont(TEXT_FONT);
    screen.setTextSize(TEXT_SIZE);
    screen.setCursor(POX_X, POX_Y + LINE_HEIGHT * LINE_1);
    screen.printf("Sending %dst", counter++);
    screen.setCursor(POX_X, POX_Y + LINE_HEIGHT * LINE_2);
    screen.printf("UnConfirmed");
    screen.setCursor(POX_X, POX_Y + LINE_HEIGHT * LINE_3);
    screen.printf("packet ...");
}

void rxCb(void *buffer, uint16_t size, uint8_t port, int16_t rssi, int8_t snr, bool ackReceived, uint16_t uplinkCounter, uint16_t downlinkCounter)
{
    screen.fillScreen(BG_COLOR);    
    screen.setTextColor(TEXT_COLOR);
    screen.setFont(TEXT_FONT);
    screen.setTextSize(TEXT_SIZE);

    screen.setCursor(POX_X, POX_Y + LINE_HEIGHT * LINE_1);
    screen.printf("Rssi = %d", rssi);
    screen.setCursor(POX_X, POX_Y + LINE_HEIGHT * LINE_2);
    screen.printf("Snr = %d", snr);
    screen.setCursor(POX_X, POX_Y + LINE_HEIGHT * LINE_3);
    screen.printf("UpCount = %d", uplinkCounter);
    screen.setCursor(POX_X, POX_Y + LINE_HEIGHT * LINE_4);
    screen.printf("DownCount = %d", downlinkCounter);
}

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

    screen.fillScreen(BG_COLOR);    
    screen.setTextColor(TEXT_COLOR);
    screen.setFont(TEXT_FONT);
    screen.setTextSize(TEXT_SIZE);
    screen.setCursor(POX_X, POX_Y + LINE_HEIGHT * LINE_1);
    screen.printf("LoRaWAN Node");
    screen.setCursor(POX_X, POX_Y + LINE_HEIGHT * LINE_3);
    screen.printf("Unconfirmed");
    screen.setCursor(POX_X, POX_Y + LINE_HEIGHT * LINE_4);
    screen.printf("Packet");
    delay(2000);
      
    if(!(node.init(/*dataRate=*/DR_4, /*txEirp=*/16))){     // Initialize the LoRaWAN node, set the data rate and Tx Eirp
        screen.fillScreen(BG_COLOR);        
        screen.setTextColor(TEXT_COLOR);
        screen.setFont(TEXT_FONT);
        screen.setTextSize(TEXT_SIZE);
        screen.setCursor(POX_X, POX_Y + LINE_HEIGHT * LINE_1);
        screen.printf("LoRaWAN Init");
        screen.setCursor(POX_X, POX_Y + LINE_HEIGHT * LINE_2);
        screen.printf("Failed!");
        screen.setCursor(POX_X, POX_Y + LINE_HEIGHT * LINE_3);
        screen.printf("Please Check:");
        screen.setCursor(POX_X, POX_Y + LINE_HEIGHT * LINE_4);
        screen.printf("DR or Region");
        while(1);
    }
    TimerInit(&appTimer, userSendUnConfirmedPacket);   // Initialize timer event
    node.setRxCB(rxCb);                                 // Set the callback function for receiving data
    node.join(joinCb);                                      // Join the LoRaWAN network

    screen.fillScreen(BG_COLOR);
    screen.setTextColor(TEXT_COLOR);
    screen.setFont(TEXT_FONT);
    screen.setTextSize(TEXT_SIZE);
    screen.setCursor(POX_X, POX_Y + LINE_HEIGHT * LINE_1);
    screen.printf("Join Request");
    screen.setCursor(POX_X, POX_Y + LINE_HEIGHT * LINE_2);
    screen.printf("Packet");
}

void loop()
{
    delay(100);
}