Komunikasi Lora SX1278 (2 Transmitter & 1 Receiver) Monitoring Jarak Sensor VL53L1X TOF400C

Komunikasi Lora SX1278 (2 Transmitter & 1 Receiver) Monitoring Jarak Sensor VL53L1X TOF400C

        Pada kesempatan kali ini saya akan menjelaskan mengenai bagaimana cara membuat sebuah alat yang dapat mengukur jarak max 4 meter dengan menggunakan sensor VL53L1X TOF400C dan komunikasi menggunakan Lora SX1278. alat ini terdapat 2 buah transmitter dan 1 buah receiver sehingga ada 3 device yang digunakan.  

1. Program Arduino Transmitter 1

#include "Wire.h"

#include "Adafruit_GFX.h"

#include "OakOLED.h"

#include <SPI.h>

#include <LoRa.h>

#include <VL53L1X.h>

VL53L1X sensor;

/*

  Module SX1278 // Arduino UNO/NANO    

    GND         ->   GND

    Vcc         ->   3.3V

    MISO        ->   D12

    MOSI        ->   D11     

    SLCK        ->   D13

    Nss         ->   D10

    Di00        ->   D2

    RST         ->   D9      

 */

 

OakOLED oled;

int jarak;

char transmitterID = 'A'; 

void sensor_init(VL53L1X::DistanceMode range_mode, bool high_speed) {

  Wire.begin();

  sensor.setTimeout(500);

  sensor.init();

  sensor.setDistanceMode(range_mode);  

  int budget = high_speed ? 33000 : 140000;

  sensor.setMeasurementTimingBudget(budget);

}

void setup() {

   Serial.begin(115200);

   oled.begin();

   oled.display();    

   while (!Serial);  

  Serial.println("LoRa Sender");

  if (!LoRa.begin(433E6)) { // or 915E6, the MHz speed of yout module

    Serial.println("Starting LoRa failed!");

    while (1);

  }

  while (!Serial) {}

  Wire.begin();

  Wire.setClock(400000); // use 400 kHz I2C

  sensor.setTimeout(500);

  if (!sensor.init())

  {

    Serial.println("Failed to detect and initialize sensor!");

    while (1);

  }

  // Use long distance mode and allow up to 50000 us (50 ms) for a measurement.

  // You can change these settings to adjust the performance of the sensor, but

  // the minimum timing budget is 20 ms for short distance mode and 33 ms for

  // medium and long distance modes. See the VL53L1X datasheet for more

  // information on range and timing limits.

  sensor.setDistanceMode(VL53L1X::Long);

  sensor.setMeasurementTimingBudget(50000);

  // Start continuous readings at a rate of one measurement every 50 ms (the

  // inter-measurement period). This period should be at least as long as the

  // timing budget.

  sensor.startContinuous(50);

} 

void loop() {

  

  jarak = sensor.read()/10;

  //Serial.println(jarak);

  

  oled.clearDisplay();

  oled.setTextSize(2);

  oled.setTextColor(1);

  oled.setCursor(0, 0);

  oled.print(jarak); 

  oled.display(); 

     

  LoRa.beginPacket();

  LoRa.print(transmitterID); // Send ID

  LoRa.print(",");

  LoRa.print(jarak);   // Send Data

  LoRa.endPacket();

  delay(50);

   

}

2. Program Arduino Transmitter 2

#include "Wire.h"

#include "Adafruit_GFX.h"

#include "OakOLED.h"

#include <SPI.h>

#include <LoRa.h>

#include <VL53L1X.h>

VL53L1X sensor;

/*

  Module SX1278 // Arduino UNO/NANO    

    GND         ->   GND

    Vcc         ->   3.3V

    MISO        ->   D12

    MOSI        ->   D11     

    SLCK        ->   D13

    Nss         ->   D10

    Di00        ->   D2

    RST         ->   D9      

 */

 

OakOLED oled;

int jarak;

char transmitterID = 'B'; 

void sensor_init(VL53L1X::DistanceMode range_mode, bool high_speed) {

  Wire.begin();

  sensor.setTimeout(500);

  sensor.init();

  sensor.setDistanceMode(range_mode);  

  int budget = high_speed ? 33000 : 140000;

  sensor.setMeasurementTimingBudget(budget);

}

void setup() {

   Serial.begin(115200);

   oled.begin();

   oled.display();    

   while (!Serial);  

  Serial.println("LoRa Sender");

  if (!LoRa.begin(433E6)) { // or 915E6, the MHz speed of yout module

    Serial.println("Starting LoRa failed!");

    while (1);

  }

  while (!Serial) {}

  Wire.begin();

  Wire.setClock(400000); // use 400 kHz I2C

  sensor.setTimeout(500);

  if (!sensor.init())

  {

    Serial.println("Failed to detect and initialize sensor!");

    while (1);

  }

  // Use long distance mode and allow up to 50000 us (50 ms) for a measurement.

  // You can change these settings to adjust the performance of the sensor, but

  // the minimum timing budget is 20 ms for short distance mode and 33 ms for

  // medium and long distance modes. See the VL53L1X datasheet for more

  // information on range and timing limits.

  sensor.setDistanceMode(VL53L1X::Long);

  sensor.setMeasurementTimingBudget(50000);

  // Start continuous readings at a rate of one measurement every 50 ms (the

  // inter-measurement period). This period should be at least as long as the

  // timing budget.

  sensor.startContinuous(50);

} 

void loop() {

  

  jarak = sensor.read()/10;

  //Serial.println(jarak);

  

  oled.clearDisplay();

  oled.setTextSize(2);

  oled.setTextColor(1);

  oled.setCursor(0, 0);

  oled.print(jarak); 

  oled.display(); 

     

  LoRa.beginPacket();

  LoRa.print(transmitterID); // Send ID

  LoRa.print(",");

  LoRa.print(jarak);   // Send Data

  LoRa.endPacket();

  delay(50);

   

}

3. Program Arduino Receiver

#include <SPI.h>

#include <LoRa.h>   //Download here: http://electronoobs.com/eng_arduino_LoRa_SX1278.php.php

#include "Wire.h"

#include "Adafruit_GFX.h"

#include "OakOLED.h"

OakOLED oled;

String inString = "";    // string to hold input

int jarak1 = 0;

int jarak2 = 0;

String receivedData = "";

long lastChannelSwitchTime = 0;

long channelSwitchInterval = 3000; // Switch channels every 3 seconds

void setup() {

  Serial.begin(115200);

  oled.begin();

  oled.display(); 

   

  while (!Serial);

  Serial.println("LoRa Receiver");

  if (!LoRa.begin(433E6)) { // or 915E6

    Serial.println("Starting LoRa failed!");

    while (1);

  }

}

void loop() {

  

int packetSize = LoRa.parsePacket();

  if (packetSize) {

    String received = "";

    while (LoRa.available()) {

      received += (char)LoRa.read();

    }

    

    // Parse format: "ID,Value"

    int commaIndex = received.indexOf(',');

    if (commaIndex != -1) {

      String id = received.substring(0, commaIndex);

      String value = received.substring(commaIndex + 1);

      if(id == "A"){

        jarak1 = value.toInt();;

      }

      if(id == "B"){

        jarak2 = value.toInt();;

      }

         

      //Serial.print("From: ");

      //Serial.print(id);

      //Serial.print(" Value: ");

      //Serial.println(value);

    }

  }

  oled.clearDisplay();

  oled.setTextSize(2);

  oled.setTextColor(2);

  oled.setCursor(0, 0);

  oled.print("S1: ");

  oled.println(jarak1);

  oled.setTextSize(2);

  oled.setTextColor(2);

  oled.setCursor(0, 20);

  oled.print("S2: ");

  oled.println(jarak2);

  oled.display();        

}

4. VIDEO HASILNYA