I just cant seem to get this to work I have scoured the net and read so many posts but I am unsure of what I am doing wrong.
also Lmic_setTxData2 gets upset with arg 2.
The do_read_sensor() function always comes back empty.
i.e. distance is always zero.
Any help would be very graciously appreciated.
#include <lmic.h>
#include <hal/hal.h>
#include <SPI.h>
#include <SoftwareSerial.h>
unsigned char buffer_RTT[4] = {0};// Used to store data read from the serial port
int distance;//Used to store the read distance value
unsigned char CS;//Save checksum
#define COM 0x55
SoftwareSerial mySerial(11, 12); // RX, TX
//
// For normal use, we require that you edit the sketch to replace FILLMEIN
// with values assigned by the TTN console. However, for regression tests,
// we want to be able to compile these scripts. The regression tests define
// COMPILE_REGRESSION_TEST, and in that case we define FILLMEIN to a non-
// working but innocuous value.
//
// #ifdef COMPILE_REGRESSION_TEST
// # define FILLMEIN 0
// #else
// # warning “You must replace the values marked FILLMEIN with real values from the TTN control panel!”
// # define FILLMEIN (#dont edit this, edit the lines that use FILLMEIN)
// #endif
// 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]= {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00};
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]= {xxxxxxxx};
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 the TTN console can be copied as-is.
static const u1_t PROGMEM APPKEY[16] = {xxxxxxx};
void os_getDevKey (u1_t* buf) { memcpy_P(buf, APPKEY, 16);}
static osjob_t sendjob;
static osjob_t readjob;
// Schedule TX every this many seconds (might become longer due to duty
// cycle limitations).
const unsigned TX_INTERVAL = 60;
// Pin mapping for Dragino Lorashield
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”));
{
u4_t netid = 0;
devaddr_t devaddr = 0;
u1_t nwkKey[16];
u1_t artKey[16];
LMIC_getSessionKeys(&netid, &devaddr, nwkKey, artKey);
Serial.print("netid: ");
Serial.println(netid, DEC);
Serial.print("devaddr: ");
Serial.println(devaddr, HEX);
Serial.print(“artKey: “);
for (int i=0; i<sizeof(artKey); ++i) {
Serial.print(artKey[i], HEX);
}
Serial.println(””);
Serial.print(“nwkKey: “);
for (int i=0; i<sizeof(nwkKey); ++i) {
Serial.print(nwkKey[i], HEX);
}
Serial.println(””);
}
Serial.println(F(“Successful OTAA Join…”));
// Disable link check validation (automatically enabled
// during join, but because slow data rates change max TX
// size, we don’t use it in this example.
LMIC_setLinkCheckMode(0);
break;
/*
|| This event is defined but not used in the code. No
|| point in wasting codespace on it.
||
|| 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.print(F(“Received “));
Serial.print(LMIC.dataLen);
Serial.println(F(” bytes of payload”));
}
// Schedule next transmission
os_setTimedCallback(&sendjob, os_getTime()+sec2osticks(TX_INTERVAL), do_send);
// Schedule next Sensor read
os_setCallback(&readjob, do_read_sensor);
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”));
// Schedule next Sensor read
//os_setCallback(&readjob, do_read_sensor);
break;
case EV_LINK_DEAD:
Serial.println(F(“EV_LINK_DEAD”));
break;
case EV_LINK_ALIVE:
Serial.println(F(“EV_LINK_ALIVE”));
break;
/
|| This event is defined but not used in the code. No
|| point in wasting codespace on it.
||
|| case EV_SCAN_FOUND:
|| Serial.println(F(“EV_SCAN_FOUND”));
|| break;
*/
case EV_TXSTART:
Serial.println(F(“EV_TXSTART”));
break;
default:
Serial.print(F("Unknown event: "));
Serial.println((unsigned) ev);
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.
// transmit on port 1 (the first parameter); you can use any value from 1 to 223 (others are reserved).
// don't request an ack (the last parameter, if not zero, requests an ack from the network).
// Remember, acks consume a lot of network resources; don't ask for an ack unless you really need it.
LMIC_setTxData2(1,distance, sizeof(distance), 0);
Serial.println(F("Packet queued"));
Serial.print(F("Sending packet on frequency: "));
Serial.println(LMIC.freq);
}
// Next TX is scheduled after TX_COMPLETE event.
}
void do_read_sensor(osjob_t* j){
// Get distance data from Ultrasonic sensor Serial Mode
mySerial.write(COM);
delay(100);
if (mySerial.available() > 0){
delay(4);
if(mySerial.read() == 0xff){ //Check packet header
buffer_RTT[0] = 0xff;
for (int i=1; i<4; i++){
buffer_RTT[i] = mySerial.read(); //Read distance data
}
CS = buffer_RTT[0] + buffer_RTT[1]+ buffer_RTT[2]; //Compute checksum
if(buffer_RTT[3] == CS) {
distance = (buffer_RTT[1] << 8) + buffer_RTT[2];//Calculate distance
}
}
}
Serial.println("Distance: ");
Serial.print(distance);
Serial.println("mm");
}
void setup() {
Serial.begin(115200);
mySerial.begin(9600);
Serial.println(F("Starting"));
#if defined(CFG_au921)
Serial.println(F("Loading AU915/AU921 Configuration..."));
#endif
// LMIC init
os_init();
// Reset the MAC state. Session and pending data transfers will be discarded.
LMIC_reset();
LMIC_setDrTxpow(DR_SF7, 14);
LMIC_selectSubBand(1);
LMIC_setClockError(MAX_CLOCK_ERROR * 1 / 100);
// Start job (sending automatically starts OTAA too)
do_read_sensor(&readjob);
do_send(&sendjob);
}
void loop() {
os_runloop_once();
}