#include <Wire.h>
#include <SPI.h>
#include <Adafruit_BMP280.h>

#define BME_SCK 13
#define BME_MISO 12
#define BME_MOSI 11
#define BME_CS 10

#define SEALEVELPRESSURE_HPA (1013.25)

#include "BC26.h"
//Adafruit_BMP280 bmp; // I2C
Adafruit_BMP280 bmp(BME_CS); // hardware SPI
//Adafruit_BME280 bme(BME_CS, BME_MOSI, BME_MISO, BME_SCK); // software SPI

unsigned long delayTime;
/*這一段是偵測電池電量的變數宣告*/
int analogInPin  = A4;    // Analog input pin
int sensorValue;          // Analog Output of Sensor
float calibration = 0.67; // Check Battery voltage using multimeter & add/subtract the value
int bat_percentage;
float voltage;
/*這一段是偵測電池電量的變數宣告*/

void setup() {
    Serial.begin(9600);
    mySerial.begin(9600);
    delay(500);
    while(!Serial);    // time to get serial running
    Serial.println(F("BME280 test"));
    BC26_initail(); // 啟動與設定連線的伺服器
    delay(5000);
    bool status;
    
    // default settings
    status = bmp.begin();  
    
    if (!status) {
        Serial.println("Could not find a valid BMP280 sensor, check wiring, address, sensor ID!");
        while (1);
    }

    Serial.println("-- Default Test --");
    delayTime = 1800000;

    Serial.println();
    int sta_pre = sta;
    build_MQTT_connect(server_IP, server_port);
    delay(5000);
    reading(sta_pre, sta);
    connect_MQTT();
    delay(5000);
    reading(sta_pre, sta);
    delay(10000);
}

void loop() { 
    sendBatteryValue();//傳送偵測到的電池電量值
    printBME280Values();//傳送BME280偵測到的值    
    delay(delayTime);
}

void printBME280Values() {
  Serial.println("GetTemp&Humi&Pre&Alt OK! ");
  float Temperature = bmp.readTemperature();
  Serial.print(Temperature); Serial.println(" °C");
  //float Humidity = bmp.readHumidity();
  //Serial.println(Humidity); Serial.println(" %");
  float Pressure = bmp.readPressure() / 100.0F;
  Serial.print(Pressure); Serial.println(" hPa");
  float Altitude = bmp.readAltitude(SEALEVELPRESSURE_HPA);
  Serial.print(Altitude); Serial.println(" m");
  MQTTtopic="nbiot/bmp";
  MQTTmessage=String(Temperature)+","+String(Pressure)+","+String(Altitude)
  +","+String(sensorValue)+","+String(voltage)+","+String(bat_percentage);
  Publish_MQTT(MQTTtopic, MQTTmessage);
  Serial.println("PutTemp&Humi&Pre&Alt OK! ");  
}

void sendBatteryValue(){
  sensorValue = analogRead(analogInPin);
  voltage = (((sensorValue * 3.3) / 1024) * 2 + calibration); //multiply by two as voltage divider network is 100K & 100K Resistor
 
  bat_percentage = mapfloat(voltage, 2.8, 4.2, 0, 100); //2.8V as Battery Cut off Voltage & 4.2V as Maximum Voltage
 
  if (bat_percentage >= 100)
  {
    bat_percentage = 100;
  }
  if (bat_percentage <= 0)
  {
    bat_percentage = 1;
  }
 
  Serial.print("Analog Value = ");
  Serial.print(sensorValue);
  Serial.print("\t Output Voltage = ");
  Serial.print(voltage);
  Serial.print("\t Battery Percentage = ");
  Serial.println(bat_percentage);
}

float mapfloat(float x, float in_min, float in_max, float out_min, float out_max)
{
  return (x - in_min) * (out_max - out_min) / (in_max - in_min) + out_min;
}