/*******************************************************************************
 * Copyright (c) 2015 Thomas Telkamp and Matthijs Kooijman
 *
 * Permission is hereby granted, free of charge, to anyone
 * obtaining a copy of this document and accompanying files,
 * to do whatever they want with them without any restriction,
 * including, but not limited to, copying, modification and redistribution.
 * NO WARRANTY OF ANY KIND IS PROVIDED.
 *
 * This example sends a valid LoRaWAN packet with payload "Hello,
 * world!", using frequency and encryption settings matching those of
 * the The Things Network.
 *
 * This uses ABP (Activation-by-personalisation), where a DevAddr and
 * Session keys are preconfigured (unlike OTAA, where a DevEUI and
 * application key is configured, while the DevAddr and session keys are
 * assigned/generated in the over-the-air-activation procedure).
 *
 * Note: LoRaWAN per sub-band duty-cycle limitation is enforced (1% in
 * g1, 0.1% in g2), but not the TTN fair usage policy (which is probably
 * violated by this sketch when left running for longer)!
 *
 * To use this sketch, first register your application and device with
 * the things network, to set or generate a DevAddr, NwkSKey and
 * AppSKey. Each device should have their own unique values for these
 * fields.
 *
 * Do not forget to define the radio type correctly in config.h.
 *
 *******************************************************************************/

#include <lmic.h>
#include <hal/hal.h>
#include <SPI.h>
#include "DFRobot_PH.h"
#include <EEPROM.h>
#include <DallasTemperature.h>
#include <OneWire.h>

#define PH_PIN A1
#define OXYGEN_PIN A2         // Analog pin for oxygen sensor
#define TURBIDITY_PIN A3      // Analog pin for turbidity sensor
#define EC_PIN A4              // Analog pin for EC sensor
#define ONE_WIRE_BUS 5        // Digital pin for DS18B20 temperature sensor
float phvoltage,phValue,phtemperature = 21; // volgens de thermostaat
DFRobot_PH ph;

OneWire oneWire(ONE_WIRE_BUS);
DallasTemperature sensors(&oneWire);

// LoRaWAN NwkSKey, network session key
// This is the default Semtech key, which is used by the early prototype TTN
// network.
static const PROGMEM u1_t NWKSKEY[16] = { 0xDB, 0x24, 0x2B, 0xF2, 0x0A, 0xDE, 0xDA, 0x76, 0xA8, 0x0B, 0xFF, 0x85, 0xFC, 0xA2, 0x83, 0x37 };

// LoRaWAN AppSKey, application session key
// This is the default Semtech key, which is used by the early prototype TTN
// network.
static const u1_t PROGMEM APPSKEY[16] = { 0x36, 0x6E, 0xCE, 0xD9, 0xEF, 0x71, 0x43, 0x1F, 0x5B, 0x29, 0xCF, 0x43, 0xD2, 0x46, 0x49, 0x86 };

// LoRaWAN end-device address (DevAddr)
static const u4_t DEVADDR = 0x260B5A70 ; // <-- Change this address for every node!

// These callbacks are only used in over-the-air activation, so they are
// left empty here (we cannot leave them out completely unless
// DISABLE_JOIN is set in config.h, otherwise the linker will complain).
void os_getArtEui (u1_t* buf) { }
void os_getDevEui (u1_t* buf) { }
void os_getDevKey (u1_t* buf) { }

static uint8_t mydata[22];
static osjob_t sendjob;

// Schedule TX every this many seconds (might become longer due to duty
// cycle limitations).
const unsigned TX_INTERVAL = 20;

// Pin mapping
const lmic_pinmap lmic_pins = {
    .nss = 10,
    .rxtx = LMIC_UNUSED_PIN,
    .rst = 9,
    .dio = {2, 6, 7},
};

// Global variables for sensor values
// float ph;
uint16_t zuurstof;
int troebelheid;
int ec;
float temperatuur;
double gpsLongitude;
double gpsLatitude;

void onEvent (ev_t ev) {
    Serial.print(os_getTime());
    Serial.print(": ");
    switch(ev) {
        case EV_SCAN_TIMEOUT:
            Serial.println(F("EV_SCAN_TIMEOUT"));
            break;
        case EV_BEACON_FOUND:
            Serial.println(F("EV_BEACON_FOUND"));
            break;
        case EV_BEACON_MISSED:
            Serial.println(F("EV_BEACON_MISSED"));
            break;
        case EV_BEACON_TRACKED:
            Serial.println(F("EV_BEACON_TRACKED"));
            break;
        case EV_JOINING:
            Serial.println(F("EV_JOINING"));
            break;
        case EV_JOINED:
            Serial.println(F("EV_JOINED"));
            break;
        case EV_RFU1:
            Serial.println(F("EV_RFU1"));
            break;
        case EV_JOIN_FAILED:
            Serial.println(F("EV_JOIN_FAILED"));
            break;
        case EV_REJOIN_FAILED:
            Serial.println(F("EV_REJOIN_FAILED"));
            break;
        case EV_TXCOMPLETE:
            Serial.println(F("EV_TXCOMPLETE (includes waiting for RX windows)"));
            if (LMIC.txrxFlags & TXRX_ACK)
              Serial.println(F("Received ack"));
            if (LMIC.dataLen) {
              Serial.println(F("Received "));
              Serial.println(LMIC.dataLen);
              Serial.println(F(" bytes of payload"));
            }
            // Schedule next transmission
            os_setTimedCallback(&sendjob, os_getTime()+sec2osticks(TX_INTERVAL), do_send);
            break;
        case EV_LOST_TSYNC:
            Serial.println(F("EV_LOST_TSYNC"));
            break;
        case EV_RESET:
            Serial.println(F("EV_RESET"));
            break;
        case EV_RXCOMPLETE:
            // data received in ping slot
            Serial.println(F("EV_RXCOMPLETE"));
            break;
        case EV_LINK_DEAD:
            Serial.println(F("EV_LINK_DEAD"));
            break;
        case EV_LINK_ALIVE:
            Serial.println(F("EV_LINK_ALIVE"));
            break;
         default:
            Serial.println(F("Unknown event"));
            break;
    }
}

void setValues() {
    // ph = 7.5;
    zuurstof = 1400;
    troebelheid = 2800;
    ec = 1200;
    temperatuur = 22.5;
    gpsLongitude = 25.123456;
    gpsLatitude = -30.123456;
}

float readPH() {
  phvoltage = analogRead(PH_PIN)/1024.0*5000;  // read the voltage
  phValue = ph.readPH(phvoltage,phtemperature);  // convert voltage to pH with temperature compensation
  Serial.println(phValue);
  return phValue;
}

float readTemperature() {
    sensors.requestTemperatures(); // Send the command to get temperatures
    float temperature = sensors.getTempCByIndex(0); // Get the temperature in Celsius
    Serial.print(F("Temperature Value: "));
    Serial.println(temperature);
    return temperature; // Return temperature
}

float readEC() {
    float ecValue = analogRead(EC_PIN); // Read the EC sensor
    Serial.print(F("EC Value: "));
    Serial.println(ecValue);
    return ecValue;
}

float readTurbidity() {
    float turbidityValue = analogRead(TURBIDITY_PIN); // Read the turbidity sensor
    Serial.print(F("Turbidity Value: "));
    Serial.println(turbidityValue);
    return turbidityValue;
}

float readOxygen() {
    float oxygenvoltage = analogRead(OXYGEN_PIN) / 1024.0 * 5000; // Read voltage
    float OxygenValue = (oxygenvoltage - 1000) / 100; // Example conversion (adjust as needed)
    Serial.print(F("Oxygen Value: "));
    Serial.println(OxygenValue);
    return OxygenValue;
}

void do_send(osjob_t* j) {
    // Check if there is not a current TX/RX job running
    if (LMIC.opmode & OP_TXRXPEND) {
        Serial.println(F("OP_TXRXPEND, not sending"));
    } else {
        // Prepare upstream data transmission at the next possible time.
        int cursor = 0;
        
        // Ensure mydata array is defined and has sufficient size
        mydata[cursor++] = (int)(readPH()*10);  // Convert pH to an integer value

        mydata[cursor++] = (int)readOxygen() >> 8;    // Add zuurstof
        mydata[cursor++] = (int)readOxygen();    // Add zuurstof

        mydata[cursor++] = (int)readTurbidity() >> 8;  // Add troebelheid
        mydata[cursor++] = (int)readTurbidity();  // Add troebelheid

        mydata[cursor++] = (int)(readEC()*100) >> 8;          // Add ec
        mydata[cursor++] = (int)(readEC()*100);          // Add ec

        mydata[cursor++] = (int)(readTemperature() * 10) >> 8;  // Convert temperature to an integer
        mydata[cursor++] = (int)(readTemperature() * 10);  // Convert temperature to an integer
        
        long long editedLongitude = (long long)((gpsLongitude+180)*1000000);
        mydata[cursor++] = (editedLongitude) >> 24;  // Scale to integer
        mydata[cursor++] = (editedLongitude) >> 16;  // Scale to integer
        mydata[cursor++] = (editedLongitude) >> 8;  // Scale to integer
        mydata[cursor++] = (editedLongitude);  // Scale to integer

        long long editedLatitude = (long long)((gpsLatitude+90)*1000000);
        mydata[cursor++] = (editedLatitude) >> 24;  // Scale to integer
        mydata[cursor++] = (editedLatitude) >> 16;  // Scale to integer
        mydata[cursor++] = (editedLatitude) >> 8;  // Scale to integer
        mydata[cursor++] = (editedLatitude);  // Scale to integer

        LMIC_setTxData2(1, mydata, cursor, 0);  // Use cursor for the size
        Serial.println(F("Packet queued"));
        
    }
    // Next TX is scheduled after TX_COMPLETE event.
}

void setup() {
    Serial.begin(115200);
    ph.begin();
    sensors.begin();

    Serial.println(F("Starting"));

    #ifdef VCC_ENABLE
    // For Pinoccio Scout boards
    pinMode(VCC_ENABLE, OUTPUT);
    digitalWrite(VCC_ENABLE, HIGH);
    delay(1000);
    #endif

    // LMIC init
    os_init();
    // Reset the MAC state. Session and pending data transfers will be discarded.
    LMIC_reset();
    //set values
    setValues();

    // Set static session parameters. Instead of dynamically establishing a session
    // by joining the network, precomputed session parameters are be provided.
    #ifdef PROGMEM
    // On AVR, these values are stored in flash and only copied to RAM
    // once. Copy them to a temporary buffer here, LMIC_setSession will
    // copy them into a buffer of its own again.
    uint8_t appskey[sizeof(APPSKEY)];
    uint8_t nwkskey[sizeof(NWKSKEY)];
    memcpy_P(appskey, APPSKEY, sizeof(APPSKEY));
    memcpy_P(nwkskey, NWKSKEY, sizeof(NWKSKEY));
    LMIC_setSession (0x1, DEVADDR, nwkskey, appskey);
    #else
    // If not running an AVR with PROGMEM, just use the arrays directly
    LMIC_setSession (0x1, DEVADDR, NWKSKEY, APPSKEY);
    #endif

    #if defined(CFG_eu868)
    // Set up the channels used by the Things Network, which corresponds
    // to the defaults of most gateways. Without this, only three base
    // channels from the LoRaWAN specification are used, which certainly
    // works, so it is good for debugging, but can overload those
    // frequencies, so be sure to configure the full frequency range of
    // your network here (unless your network autoconfigures them).
    // Setting up channels should happen after LMIC_setSession, as that
    // configures the minimal channel set.
    // NA-US channels 0-71 are configured automatically
    LMIC_setupChannel(0, 868100000, DR_RANGE_MAP(DR_SF12, DR_SF7),  BAND_CENTI);      // g-band
    LMIC_setupChannel(1, 868300000, DR_RANGE_MAP(DR_SF12, DR_SF7B), BAND_CENTI);      // g-band
    LMIC_setupChannel(2, 868500000, DR_RANGE_MAP(DR_SF12, DR_SF7),  BAND_CENTI);      // g-band
    LMIC_setupChannel(3, 867100000, DR_RANGE_MAP(DR_SF12, DR_SF7),  BAND_CENTI);      // g-band
    LMIC_setupChannel(4, 867300000, DR_RANGE_MAP(DR_SF12, DR_SF7),  BAND_CENTI);      // g-band
    LMIC_setupChannel(5, 867500000, DR_RANGE_MAP(DR_SF12, DR_SF7),  BAND_CENTI);      // g-band
    LMIC_setupChannel(6, 867700000, DR_RANGE_MAP(DR_SF12, DR_SF7),  BAND_CENTI);      // g-band
    LMIC_setupChannel(7, 867900000, DR_RANGE_MAP(DR_SF12, DR_SF7),  BAND_CENTI);      // g-band
    LMIC_setupChannel(8, 868800000, DR_RANGE_MAP(DR_FSK,  DR_FSK),  BAND_MILLI);      // g2-band
    // TTN defines an additional channel at 869.525Mhz using SF9 for class B
    // devices' ping slots. LMIC does not have an easy way to define set this
    // frequency and support for class B is spotty and untested, so this
    // frequency is not configured here.
    #elif defined(CFG_us915)
    // NA-US channels 0-71 are configured automatically
    // but only one group of 8 should (a subband) should be active
    // TTN recommends the second sub band, 1 in a zero based count.
    // https://github.com/TheThingsNetwork/gateway-conf/blob/master/US-global_conf.json
    LMIC_selectSubBand(1);
    #endif

    // Disable link check validation
    LMIC_setLinkCheckMode(0);

    // TTN uses SF9 for its RX2 window.
    LMIC.dn2Dr = DR_SF9;

    // Set data rate and transmit power for uplink (note: txpow seems to be ignored by the library)
    LMIC_setDrTxpow(DR_SF7,14);

    // Start job
    do_send(&sendjob);
}

void loop() {
    os_runloop_once();
}