longfi-us915-cayenne-dht22.ino

/*******************************************************************************
 * 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 OTAA (Over-the-air activation), where where a DevEUI and
 * application key is configured, which are used in an over-the-air
 * activation procedure where a DevAddr and session keys are
 * assigned/generated for use with all further communication.
 *
 * 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 an AppEUI, DevEUI and AppKey.
 * Multiple devices can use the same AppEUI, but each device has its own
 * DevEUI and AppKey.
 *
 * Do not forget to define the radio type correctly in config.h.
 *
 *******************************************************************************/
#include <lmic.h>
#include <hal/hal.h>
#include <SPI.h>

#include <Adafruit_Sensor.h>
#include <DHT.h>
#include <DHT_U.h>

#include <CayenneLPP.h>

#define DHTPIN 12
#define DHTTYPE    DHT22     // DHT 22 (AM2302)

DHT_Unified dht(DHTPIN, DHTTYPE);

// Init CayenneLPP Payload
CayenneLPP lpp(51);

// This EUI must be in little-endian format, so least-significant-byte
// first. When copying an EUI from ttnctl output, this means to reverse
// the bytes. For TTN issued EUIs the last bytes should be 0xD5, 0xB3,
// 0x70.
static const u1_t PROGMEM APPEUI[8]={ FILL_ME_IN };
void os_getArtEui (u1_t* buf) { memcpy_P(buf, APPEUI, 8);}

// This should also be in little endian format, see above.
static const u1_t PROGMEM DEVEUI[8]={ FILL_ME_IN };
void os_getDevEui (u1_t* buf) { memcpy_P(buf, DEVEUI, 8);}

// This key should be in big endian format (or, since it is not really a
// number but a block of memory, endianness does not really apply). In
// practice, a key taken from ttnctl can be copied as-is.
// The key shown here is the semtech default key.
static const u1_t PROGMEM APPKEY[16] = { FILL_ME_IN };
void os_getDevKey (u1_t* buf) {  memcpy_P(buf, APPKEY, 16);}

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 = 8,
    .rxtx = LMIC_UNUSED_PIN,
    .rst = 4,
    .dio = {3, 6, 2},
};

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"));

            // Disable link check validation (automatically enabled
            // during join, but not supported by TTN at this time).
            LMIC_setLinkCheckMode(0);
            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;
            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 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 {

        // Clear Payload
        lpp.reset();
      
        // Get temperature event and print its value.
        sensors_event_t event;
        dht.temperature().getEvent(&event);
        if (isnan(event.temperature)) {
          Serial.println(F("Error reading temperature!"));
        }
        else {
          Serial.print(F("Temperature: "));
          Serial.print(event.temperature);
          Serial.println(F("°C"));

          lpp.addTemperature(1, event.temperature);
        }
        // Get humidity event and print its value.
        dht.humidity().getEvent(&event);
        if (isnan(event.relative_humidity)) {
          Serial.println(F("Error reading humidity!"));
        }
        else {
          Serial.print(F("Humidity: "));
          Serial.print(event.relative_humidity);
          Serial.println(F("%"));

          lpp.addRelativeHumidity(2, event.relative_humidity);
        }

        // Prepare upstream data transmission at the next possible time.
        LMIC_setTxData2(1, lpp.getBuffer(), lpp.getSize(), 0);
        Serial.println(F("Packet queued"));
    }
    // Next TX is scheduled after TX_COMPLETE event.
}

void setup() {
    Serial.begin(9600);
    Serial.println(F("Starting"));

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

    // Initialize DHT22.
    dht.begin();
    Serial.println(F("DHTxx Unified Sensor Example"));
    // Print temperature sensor details.
    sensor_t sensor;
    dht.temperature().getSensor(&sensor);
    Serial.println(F("------------------------------------"));
    Serial.println(F("Temperature Sensor"));
    Serial.print  (F("Sensor Type: ")); Serial.println(sensor.name);
    Serial.print  (F("Driver Ver:  ")); Serial.println(sensor.version);
    Serial.print  (F("Unique ID:   ")); Serial.println(sensor.sensor_id);
    Serial.print  (F("Max Value:   ")); Serial.print(sensor.max_value); Serial.println(F("°C"));
    Serial.print  (F("Min Value:   ")); Serial.print(sensor.min_value); Serial.println(F("°C"));
    Serial.print  (F("Resolution:  ")); Serial.print(sensor.resolution); Serial.println(F("°C"));
    Serial.println(F("------------------------------------"));
    // Print humidity sensor details.
    dht.humidity().getSensor(&sensor);
    Serial.println(F("Humidity Sensor"));
    Serial.print  (F("Sensor Type: ")); Serial.println(sensor.name);
    Serial.print  (F("Driver Ver:  ")); Serial.println(sensor.version);
    Serial.print  (F("Unique ID:   ")); Serial.println(sensor.sensor_id);
    Serial.print  (F("Max Value:   ")); Serial.print(sensor.max_value); Serial.println(F("%"));
    Serial.print  (F("Min Value:   ")); Serial.print(sensor.min_value); Serial.println(F("%"));
    Serial.print  (F("Resolution:  ")); Serial.print(sensor.resolution); Serial.println(F("%"));
    Serial.println(F("------------------------------------"));

    // LMIC init
    os_init();
    // Reset the MAC state. Session and pending data transfers will be discarded.
    LMIC_reset();
    
    // allow much more clock error than the X/1000 default. See:
    // https://github.com/mcci-catena/arduino-lorawan/issues/74#issuecomment-462171974
    // https://github.com/mcci-catena/arduino-lmic/commit/42da75b56#diff-16d75524a9920f5d043fe731a27cf85aL633
    // the X/1000 means an error rate of 0.1%; the above issue discusses using
    // values up to 10%. so, values from 10 (10% error, the most lax) to 1000
    // (0.1% error, the most strict) can be used.
    LMIC_setClockError(1 * MAX_CLOCK_ERROR / 40);

    // Sub-band 2 - Helium Network
    LMIC_selectSubBand(1); // zero indexed 
    LMIC_setLinkCheckMode(0);
    LMIC_setDrTxpow(DR_SF7, 14);

    // Start job (sending automatically starts OTAA too)
    do_send(&sendjob);
}

void loop() {
    os_runloop_once();
}