sendingecho.ino

/*******************************************************************************
 * TSB LoraNode with Ultrasound sensor.
 * Based on https://github.com/matthijskooijman/arduino-lmic/blob/master/examples/ttn-abp/ttn-abp.ino
 * by Thomas Telkamp and Matthijs Kooijman
 *To use this sketch on another Node please register a new device om TTN and change the Network Session Key, Application Key, etc
 *******************************************************************************/
#include <TheThingsNetwork.h>
#include <NewPing.h>  //Library for ultrasonic sensor
#include <lmic.h>
#include <hal/hal.h>


/**** Init Ultrasonic******/
#define TRIGGER_PIN  A0  // Arduino pin tied to trigger pin on the ultrasonic sensor.
#define ECHO_PIN     A1  // Arduino pin tied to echo pin on the ultrasonic sensor.
#define MAX_DISTANCE 200 // Maximum distance we want to ping for (in centimeters). Maximum sensor distance is rated at 400-500cm.
NewPing sonar(TRIGGER_PIN, ECHO_PIN, MAX_DISTANCE); // NewPing setup of pins and maximum distance.
// ***** End Ultrasonic *******/

// Put your LoRaWAN network session key here in the format: 0x49, 0x4A, 0x96, 0x2B, 0x29 [...];
static const PROGMEM u1_t NWKSKEY[16] = {};

// Put your LoRaWAN application session key here in the format:  0x8E, 0x1B, 0xCE, 0x1F, 0xAA, 0x21 [...]
static const u1_t PROGMEM APPSKEY[16] = {};

// Put your LoRaWAN end-device address (DevAddr) here
// See http://thethingsnetwork.org/wiki/AddressSpace
static const u4_t DEVADDR = {} ; // <-- 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 osjob_t sendjob;

int distance;
static uint8_t message[2];

// Schedule TX every this many seconds (might become longer due to duty
// cycle limitations).
const unsigned TX_INTERVAL = 60;

// Pin mapping
const lmic_pinmap lmic_pins = {
.nss = 10,
.rxtx = LMIC_UNUSED_PIN,
.rst = 9,
.dio = {2, 6, 7}, // Specify pin numbers for DIO0, 1, 2
// connected to D2, D6, D7
};

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;
            break;
        case EV_TXCOMPLETE:
            Serial.println(F("EV_TXCOMPLETE (includes waiting for RX windows)"));
            if(LMIC.dataLen) {
                // data received in rx slot after tx
                Serial.print(F("Data Received: "));
                Serial.write(LMIC.frame+LMIC.dataBeg, LMIC.dataLen);
                Serial.println();
            }
            // 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 {
        // Prepare upstream data transmission at the next possible time.
        LMIC_setTxData2(1, message, sizeof(message), 0);
        Serial.println(F("Packet queued"));
    }
    // Next TX is scheduled after TX_COMPLETE event.
}

void setup() {
    Serial.begin(115200);
    Serial.println(F("Starting"));


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

    // 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

    // Disable link check validation
    LMIC_setLinkCheckMode(0);

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

}

void loop() {
      delay(2000);
  distance = sonar.ping_cm();  //calls ultrasonic sensor via NewPing library

  if (distance > 10 || distance == 0) { // 0 could be a sensor error, therefore does not trigger
        Serial.print("Not sending, value: ");
        Serial.println(distance);

    } else {
        Serial.print(F("TRIGGERED! Value: "));
        Serial.println(distance);
        message[0] = highByte(distance);
        message[1] = lowByte(distance);
        Serial.print(F("Payload value: "));
        Serial.print(message[0]);
        Serial.println(message[1]);
        // Prepare upstream data transmission at the next possible time.
        do_send(&sendjob);
    };
    os_runloop_once(); // LMIC needs this
}