ESP32_TTGO_LoRa_BMP280_DS3231_Sender_LCD

/*********
  Rui Santos
  Complete project details at https://RandomNerdTutorials.com/ttgo-lora32-sx1276-arduino-ide/
*********/

//Libraries for LoRa
#include <SPI.h>
#include <LoRa.h>

//Libraries for OLED Display
#include <Wire.h>
#include <Adafruit_GFX.h>
#include <Adafruit_SSD1306.h>

// libraries for BME/BMP 280
#include <Adafruit_Sensor.h>
#include <Adafruit_BME280.h>

// library for RTC DS3231
#include "RTClib.h"

// buffer size for BME280 data
#define BME_BUFF_SIZE 100
char BMEbuff[BME_BUFF_SIZE];
// define sea level pressure - used for relative pressure and altitude
#define SEALEVELPRESSURE_HPA (1013.25)
// delaytime for BME280 prints
unsigned long delayTime;

// buffer for RTC data
#define RTC_BUFF_SIZE 100
char RTCbuff[RTC_BUFF_SIZE];

//define the pins used by the LoRa transceiver module
#define SCK 5
#define MISO 19
#define MOSI 27
#define SS 18
#define RST 14
#define DIO0 26

//433E6 for Asia
//866E6 for Europe
//915E6 for North America
#define BAND 915E6

//OLED pins
#define OLED_SDA 4
#define OLED_SCL 15
#define OLED_RST 16
#define SCREEN_WIDTH 128 // OLED display width, in pixels
#define SCREEN_HEIGHT 64 // OLED display height, in pixels

//packet counter
int counter = 0;

Adafruit_SSD1306 display(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire, OLED_RST);

Adafruit_BME280 bme; // I2C BME280 constructor

RTC_DS3231 rtc;
char daysOfTheWeek[7][12] = {"Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat"};


void setup() {
  //initialize Serial Monitor
  Serial.begin(9600);

  //reset OLED display via software
  pinMode(OLED_RST, OUTPUT);
  digitalWrite(OLED_RST, LOW);
  delay(20);
  digitalWrite(OLED_RST, HIGH);

  // THIS IS THE LINE CAUSING PROBLEMS!
  Wire.begin(OLED_SDA, OLED_SCL); //initialize OLED
  /*
  if(!display.begin(SSD1306_SWITCHCAPVCC, 0x3c, false, false)) { // Address 0x3C for 128x32
    Serial.println(F("SSD1306 allocation failed"));
    for(;;); // Don't proceed, loop forever
  }
  */
  /*
  display.clearDisplay();
  display.setTextColor(WHITE);
  display.setTextSize(1);
  display.setCursor(0,0);
  display.print("LORA SENDER ");
  display.display();
  */
  Serial.println("LoRa Sender Test");

  //SPI LoRa pins
  SPI.begin(SCK, MISO, MOSI, SS);
  //setup LoRa transceiver module
  LoRa.setPins(SS, RST, DIO0);

  if (!LoRa.begin(BAND)) {
    Serial.println("Starting LoRa failed!");
    while (1);
  }
  Serial.println("LoRa Initializing OK!");
  //display.setCursor(0,10);
  //display.print("LoRa Initializing OK!");
  //display.display();
  delay(2000);

  setBMP280Address(0x76);

  if (! rtc.begin()) {
    Serial.println("Couldn't find RTC");
    while (1);
  }
  rtc.adjust(DateTime(__DATE__, __TIME__));
}

void loop() {

  Serial.print("Sending packet: ");

  //Send LoRa packet to receiver
  LoRa.beginPacket();
  LoRa.print(RTCbuff);
  LoRa.print("\r\n");
  LoRa.print(BMEbuff);
  LoRa.endPacket();
  /*
  display.clearDisplay();
  display.setCursor(0,0);
  display.println("LORA SENDER");
  display.setCursor(0,20);
  display.setTextSize(1);
  display.print("LoRa packet sent.");
  display.setCursor(0,30);
  display.print("Counter:");
  display.setCursor(50,30);
  display.print(counter);
  display.display();
*/
  printBME();
  printRTC();
  delay(delayTime);
}


void setBMP280Address(uint8_t address) {
  unsigned status;

  // default settings
  status = bme.begin(address);
  // You can also pass in a Wire library object like &Wire2
  // status = bme.begin(0x76, &Wire2)
  if (!status) {
    Serial.println("Could not find a valid BME280 sensor, check wiring, address, sensor ID!");
    Serial.print("SensorID was: 0x"); Serial.println(bme.sensorID(), 16);
    Serial.print("        ID of 0xFF probably means a bad address, a BMP 180 or BMP 085\n");
    Serial.print("   ID of 0x56-0x58 represents a BMP 280,\n");
    Serial.print("        ID of 0x60 represents a BME 280.\n");
    Serial.print("        ID of 0x61 represents a BME 680.\n");
    while (1) delay(10);
  }

  Serial.println("-- Default Test --");
  Serial.print("SensorID is: 0x"); Serial.println(bme.sensorID(), 16);
  delayTime = 1000;

  Serial.println();
}

void printBME() {
  for (int i = 0; i < BME_BUFF_SIZE; i++) {
    snprintf(BMEbuff, sizeof(BMEbuff), "T:%.1f C\r\nH:%.1f %%\r\nP:%.1f HPa\r\n", //A:%.2f\n
    bme.readTemperature(), bme.readHumidity(), (bme.readPressure() / 100.0F));//,
    //bme.readAltitude(SEALEVELPRESSURE_HPA));
  }
  Serial.print(BMEbuff);
}

void printRTC(void) {
  DateTime now = rtc.now();
  Serial.print("Current Time: ");
  Serial.print(now.hour());
  Serial.print(":");
  Serial.println(now.minute());
  Serial.print("Todays Date: ");
  Serial.print(daysOfTheWeek[now.dayOfTheWeek()]);
  Serial.print(" ");
  Serial.print(now.day());
  Serial.print("/");
  Serial.print(now.month());
  Serial.print("/");
  Serial.println(now.year());


  for (int i = 0; i < RTC_BUFF_SIZE; i++) {
    snprintf(RTCbuff, sizeof(RTCbuff), "%s, %d/%d/%d %d:%d",
    daysOfTheWeek[now.dayOfTheWeek()], now.day(), now.month(),
    now.year(), now.hour(), now.minute());
  }
  Serial.print(RTCbuff);
}