Arduino uno error no data received:(


(Koren Molende Zwaluw) #1

I am using an Arduino Uno with an RC-SR04 ultrasonic sensor, and would like to forward the sendor data to the things network. I have a code that should connect us to the things network and calculate the distance. But when i look in the Serial Monitor it gives an error. I need help making this work.

Click to see code

/*******************************************************************************
* 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 (early prototype version of) The Things Network.
*
* Note: LoRaWAN per sub-band duty-cycle limitation is enforced (1% in g1,
*  0.1% in g2).
*
* Change DEVADDR to a unique address!
* See http://thethingsnetwork.org/wiki/AddressSpace
*
* Do not forget to define the radio type correctly in config.h.
*
*******************************************************************************/

#include <lmic.h>        
#include <hal/hal.h>
#include <SPI.h>
#include <CayenneLPP.h>  // installed using Sketch->Include Libary->Manage Libraries 


// Values you have to change:
// search this document (strg+F) for "change next line" and change them or it won't compile
//
/*
* 
 * Pins for Pegelstand-PCB
* 
 */
int trigger=5; 
int echo=4;  
int done=12;
CayenneLPP lpp(51);

// LoRaWAN NwkSKey, network session key (msb)
// This is the default Semtech key, which is used by the prototype TTN
// network initially.
// !!!!!!!!!!!!!!!!!!!!!!!!! change next line:    
static const PROGMEM u1_t NWKSKEY[16] ={"my nwkskey"};

// LoRaWAN AppSKey, application session key (msb)
// This is the default Semtech key, which is used by the prototype TTN
// network initially.
// !!!!!!!!!!!!!!!!!!!!!!!!! change next line: 
static const u1_t PROGMEM APPSKEY[16] ={" my appskey"};

// LoRaWAN end-device address (DevAddr)
// See http://thethingsnetwork.org/wiki/AddressSpace
// !!!!!!!!!!!!!!!!!!!!!!!!! change next line:  
static const u4_t DEVADDR = "my 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 uint8_t mydata[] = "Hello, world!";
static osjob_t sendjob;

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

// Pin mapping for Dragino Lora Shield v95
const lmic_pinmap lmic_pins = {
    .nss = 10,
    .rxtx = LMIC_UNUSED_PIN,
    .rst = 9,
    .dio = {2, 6, 7},
};

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)"));
              digitalWrite(done, HIGH); 
             if (LMIC.txrxFlags & TXRX_ACK) {
          Serial.println(F("Received ack"));
         
        }
            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();
            }
            else
            {
               Serial.print(F("No Data Received :("));
              // Serial.print(LMIC.dataLen);
              }
            // 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 {

    lpp.reset();
    lpp.addAnalogInput(1,getdistance());
      // 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(115200);
    Serial.println(F("Starting"));


    pinMode(trigger, OUTPUT); 
    pinMode(done, OUTPUT);
    pinMode(echo, INPUT); 

    
    #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();
    LMIC_setClockError(MAX_CLOCK_ERROR * 1 / 100);
    // 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

    // 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.
    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.

    // Disable link check validation
    LMIC_setLinkCheckMode(0);

     // TTN uses SF9 for its RX2 window.
    LMIC.dn2Dr = DR_SF9;
    // Set data rate and transmit power (note: txpow seems to be ignored by the library)
    LMIC_setDrTxpow(DR_SF7,14);
  
    // Start job
    do_send(&sendjob);
}

void loop() {
    os_runloop_once();
}



uint8_t getdistance(){
  long duration=0; 
  uint8_t distance=0; 
  digitalWrite(trigger, LOW); 
  delay(5); 
  digitalWrite(trigger, HIGH); 
  delay(10);
  digitalWrite(trigger, LOW);
  duration = pulseIn(echo, HIGH); 
  distance = (duration/2) * 0.03432; 
  if (distance >= 500 || distance <= 0) 
  {
    Serial.println("Kein Messwert"); 
  }
  else 
  {
    Serial.print(distance); 
    Serial.println(" cm"); 
  }
  return distance;
}

Error:

39 cm
Packet queued
77784903: EV_TXCOMPLETE (includes waiting for RX windows)
No Data Received :frowning:


#2

an arduino uno doesn’t have LoRaWAN possibillities.
what type of gateway do you use … single channel ?

  • please format your code (I did that for you)

(Ud Lo Ra) #3

are you sending downlinks from the network to the node? If not, you cannot expect to receive data…


#4

Please be more specific about the hardware you are using… I see you taged dragino… posting a picture would give us more info on what could be wrong.


(Koren Molende Zwaluw) #5

Thank you for your response.
20190507_093547
20190507_093246
20190507_093308
20190507_093214


#6

My first reaction would be: are you sure you have the right paramters in LMIC (for dragino)? and did you try to send a value directly to TTN-backend (without using Cayenne) and did it arrive? (to check if communication is working)