/*------------------------------------------------------
* METEO TEMPERATURE/PRESSURE 
* DUPE 9/2020 T
* Measure TEMP/PRESS and send data via LORAWAN to display on WWW
* HW HELTEC LORA CUBECELL 868 MHz, BMP280 (SPI), LORAWAN Ceske Radiokomunikace
* SPI SDA 29 | SCL 28
* CO: https://heltec-automation-docs.readthedocs.io/en/latest/index.html
-------------------------------------------------------*/

#include "LoRaWan_APP.h"
#include "Arduino.h"
#include <Wire.h>
#include <BMP280.h>
#define SDAI2CPIN      29           //   I2C SDA bus
#define SCLI2CPIN      28          //   I2C SCL bus 

/*
 * set LoraWan_RGB to Active,the RGB active in loraWan
 * RGB red means sending;
 * RGB purple means joined done;
 * RGB blue means RxWindow1;
 * RGB yellow means RxWindow2;
 * RGB green means received done;
 */

/* OTAA para*/
uint8_t devEui[] = {  ++++++++++ };
uint8_t appEui[] = { ++++++++++ };
uint8_t appKey[] = { ++++++++++ };

/* ABP para*/
uint8_t nwkSKey[] = { +++++++ };
uint8_t appSKey[] = { ++++++++};
uint32_t devAddr =  ( uint32_t )0x00;


/*LoraWan channelsmask, default channels 0-7*/ 
uint16_t userChannelsMask[6]={ 0x00FF,0x0000,0x0000,0x0000,0x0000,0x0000 };

/*LoraWan region, select in arduino IDE tools*/
LoRaMacRegion_t loraWanRegion = ACTIVE_REGION;

/*LoraWan Class, Class A and Class C are supported*/
DeviceClass_t  loraWanClass = LORAWAN_CLASS;

/*the application data transmission duty cycle.  value in [ms].*/
uint32_t appTxDutyCycle = 300000;

/*OTAA or ABP*/
bool overTheAirActivation = LORAWAN_NETMODE;

/*ADR enable*/
bool loraWanAdr = LORAWAN_ADR;

/* set LORAWAN_Net_Reserve ON, the node could save the network info to flash, when node reset not need to join again */
bool keepNet = LORAWAN_NET_RESERVE;

/* Indicates if the node is sending confirmed or unconfirmed messages */
bool isTxConfirmed = LORAWAN_UPLINKMODE;

/* Application port */
uint8_t appPort = 2;
/*!
* Number of trials to transmit the frame, if the LoRaMAC layer did not
* receive an acknowledgment. The MAC performs a datarate adaptation,
* according to the LoRaWAN Specification V1.0.2, chapter 18.4, according
* to the following table:
*
* Transmission nb | Data Rate
* ----------------|-----------
* 1 (first)       | DR
* 2               | DR
* 3               | max(DR-1,0)
* 4               | max(DR-1,0)
* 5               | max(DR-2,0)
* 6               | max(DR-2,0)
* 7               | max(DR-3,0)
* 8               | max(DR-3,0)
*
* Note, that if NbTrials is set to 1 or 2, the MAC will not decrease
* the datarate, in case the LoRaMAC layer did not receive an acknowledgment
*/
uint8_t confirmedNbTrials = 4;

uint16_t baseline;
int count;
int maxtry = 50;

BMP280 bmp;

static void prepareTxFrame( uint8_t port )
{
 pinMode(Vext, OUTPUT);
 digitalWrite(Vext, LOW);
 delay(500);	
 count = 0;
 // unsigned appData[12];
 // Wire.begin();
 Wire.begin(SDAI2CPIN, SCLI2CPIN);
 bmp.begin();
 delay(1000);
  bmp.setSampling(BMP280::MODE_NORMAL,     
                  BMP280::SAMPLING_X2,     
                  BMP280::SAMPLING_X2,    
                  BMP280::FILTER_X2,    
                  BMP280::STANDBY_MS_500); 
  delay(500);               
  int temp = 100*(bmp.readTemperature()+50);
  delay(1000);
  int tlak = bmp.readPressure();
  delay(1000);
  Wire.end();
  count++;
  delay(500);
  // if (tlak > 1190 || tlak < 800) {
  //  Serial.println("BMP ERROR");
  // }
  uint vbat = getBatteryVoltage();

  Serial.print("Teplota=");
  Serial.print(temp);
  Serial.print(" Tlak=");
  Serial.print(tlak);
  Serial.print(", BatteryVoltage:");
  Serial.println(vbat);

  appDataSize = 13;
  char msg1[4];
  char msg2[5];
  char msg3[4];  
  char payload[13];
  String payloads = "";
  payloads.concat(temp);
  payloads.concat(tlak);
  payloads.concat(vbat);
  payloads.toCharArray(payload,14);
  // appData = (unsigned char *)payload;
  strcpy ((char*)appData, payload); 
  Serial.print("Message=");
  Serial.println(payloads);
}

void setup() {
	
	boardInitMcu();
	Serial.begin(115200);
#if(AT_SUPPORT)
	enableAt();
#endif
	deviceState = DEVICE_STATE_INIT;
	LoRaWAN.ifskipjoin();
}

void loop()
{
	switch( deviceState )
	{
		case DEVICE_STATE_INIT:
		{
#if(AT_SUPPORT)
			getDevParam();
#endif
			printDevParam();
			LoRaWAN.init(loraWanClass,loraWanRegion);
			deviceState = DEVICE_STATE_JOIN;
			break;
		}
		case DEVICE_STATE_JOIN:
		{
			LoRaWAN.join();
			break;
		}
		case DEVICE_STATE_SEND:
		{
			prepareTxFrame( appPort );
			LoRaWAN.send();
			deviceState = DEVICE_STATE_CYCLE;
			break;
		}
		case DEVICE_STATE_CYCLE:
		{
			// Schedule next packet transmission
			txDutyCycleTime = appTxDutyCycle + randr( 0, APP_TX_DUTYCYCLE_RND );
			LoRaWAN.cycle(txDutyCycleTime);
			deviceState = DEVICE_STATE_SLEEP;
			break;
		}
		case DEVICE_STATE_SLEEP:
		{
			LoRaWAN.sleep();
			break;
		}
		default:
		{
			deviceState = DEVICE_STATE_INIT;
			break;
		}
	}
}