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#include <lmic.h>
#include <hal/hal.h>
#include <WiFi.h>
// UPDATE the config.h file in the same folder WITH YOUR TTN KEYS AND ADDR.
#include "config.h"
#include "gps.h"
// T-Beam specific hardware
#define BUILTIN_LED 21
char s[32]; // used to sprintf for Serial output
uint8_t txBuffer[9];
gps gps;
// 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;
// Schedule TX every this many seconds (might become longer due to duty cycle limitations).
const unsigned TX_INTERVAL = 30;
// Pin mapping
const lmic_pinmap lmic_pins = {
.nss = 18,
.rxtx = LMIC_UNUSED_PIN,
.rst = LMIC_UNUSED_PIN, // was "14,"
.dio = {26, 33, 32},
};
void onEvent (ev_t ev) {
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;
case EV_TXCOMPLETE:
Serial.println(F("EV_TXCOMPLETE (includes waiting for RX windows)"));
digitalWrite(BUILTIN_LED, LOW);
if (LMIC.txrxFlags & TXRX_ACK) {
Serial.println(F("Received Ack"));
}
if (LMIC.dataLen) {
sprintf(s, "Received %i bytes of payload", LMIC.dataLen);
Serial.println(s);
sprintf(s, "RSSI %d SNR %.1d", LMIC.rssi, LMIC.snr);
Serial.println(s);
}
// 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
{
if (gps.checkGpsFix())
{
// Prepare upstream data transmission at the next possible time.
gps.buildPacket(txBuffer);
LMIC_setTxData2(1, txBuffer, sizeof(txBuffer), 0);
Serial.println(F("Packet queued"));
digitalWrite(BUILTIN_LED, HIGH);
}
else
{
//try again in 3 seconds
os_setTimedCallback(&sendjob, os_getTime() + sec2osticks(3), do_send);
}
}
// Next TX is scheduled after TX_COMPLETE event.
}
void setup() {
Serial.begin(115200);
Serial.println(F("TTN Mapper"));
//Turn off WiFi and Bluetooth
WiFi.mode(WIFI_OFF);
btStop();
gps.init();
// LMIC init
os_init();
// Reset the MAC state. Session and pending data transfers will be discarded.
LMIC_reset();
LMIC_setSession (0x1, DEVADDR, NWKSKEY, APPSKEY);
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
// 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);
do_send(&sendjob);
pinMode(BUILTIN_LED, OUTPUT);
digitalWrite(BUILTIN_LED, LOW);
}
void loop() {
os_runloop_once();
}