// If you are in USA on a 915Mhz network instead of an european / 868 Mhz one,
// you MUST modify the arduino lmic library "config.h" to enable CFG_us915 instead of CFG_eu868.
// That "config.h" should be in the same folder as the "lmic.h" file in your arduino folders.
#include <lmic.h>
#include <hal/hal.h>
// UPDATE our "device_config.h" file in the same folder WITH YOUR TTN KEYS AND ADDR.
#include "device_config.h"
#include "gps.h"
#include <WiFi.h>
#include <esp_sleep.h>
#include "axp20x.h"
AXP20X_Class axp;
// T-Beam specific hardware
#undef BUILTIN_LED
#define BUILTIN_LED 21
char s[32]; // used to sprintf for Serial output
uint8_t txBuffer[10];
gps gps;
static osjob_t sendjob;
// Those variables keep their values after software restart or wakeup from sleep, not after power loss or hard reset !
RTC_NOINIT_ATTR int RTCseqnoUp, RTCseqnoDn;
#ifdef USE_OTAA
RTC_NOINIT_ATTR u4_t otaaDevAddr;
RTC_NOINIT_ATTR u1_t otaaNetwKey[16];
RTC_NOINIT_ATTR u1_t otaaApRtKey[16];
#endif
// Schedule TX every this many seconds (might become longer due to duty cycle limitations).
const unsigned TX_INTERVAL = 120;
// Pin mapping for TBeams, might not suit the latest version > 1.0 ?
const lmic_pinmap lmic_pins = {
.nss = 18,
.rxtx = LMIC_UNUSED_PIN,
.rst = LMIC_UNUSED_PIN, // was "14,"
.dio = {26, 33, 32},
};
// These callbacks are only used in over-the-air activation.
#ifdef USE_OTAA
void os_getDevEui (u1_t* buf) {
memcpy_P(buf, DEVEUI, 8);
}
void os_getArtEui (u1_t* buf) {
memcpy_P(buf, APPEUI, 8);
}
void os_getDevKey (u1_t* buf) {
memcpy_P(buf, APPKEY, 16);
}
#else
void os_getArtEui (u1_t* buf) { }
void os_getDevEui (u1_t* buf) { }
void os_getDevKey (u1_t* buf) { }
#endif
void storeFrameCounters()
{
RTCseqnoUp = LMIC.seqnoUp;
RTCseqnoDn = LMIC.seqnoDn;
sprintf(s, "Counters stored as %d/%d", LMIC.seqnoUp, LMIC.seqnoDn);
Serial.println(s);
}
void restoreFrameCounters()
{
LMIC.seqnoUp = RTCseqnoUp;
LMIC.seqnoDn = RTCseqnoDn;
sprintf(s, "Restored counters as %d/%d", LMIC.seqnoUp, LMIC.seqnoDn);
Serial.println(s);
}
void setOrRestorePersistentCounters()
{
esp_reset_reason_t reason = esp_reset_reason();
if ((reason != ESP_RST_DEEPSLEEP) && (reason != ESP_RST_SW))
{
Serial.println(F("Counters both set to 0"));
LMIC.seqnoUp = 0;
LMIC.seqnoDn = 0;
}
else
{
restoreFrameCounters();
}
}
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"));
#ifdef USE_OTAA
otaaDevAddr = LMIC.devaddr;
memcpy_P(otaaNetwKey, LMIC.nwkKey, 16);
memcpy_P(otaaApRtKey, LMIC.artKey, 16);
sprintf(s, "got devaddr = 0x%X", LMIC.devaddr);
Serial.println(s);
#endif
// Disable link check validation (automatically enabled
// during join, but not supported by TTN at this time).
LMIC_setLinkCheckMode(0);
// TTN uses SF9 for its RX2 window.
LMIC.dn2Dr = DR_SF9;
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);
}
storeFrameCounters();
// Schedule next transmission
Serial.println("Good night...");
axp.setChgLEDMode(AXP20X_LED_OFF);
axp.setPowerOutPut(AXP192_LDO2, AXP202_OFF);
axp.setPowerOutPut(AXP192_LDO3, AXP202_OFF);
axp.setPowerOutPut(AXP192_DCDC2, AXP202_OFF);
axp.setPowerOutPut(AXP192_DCDC1, AXP202_OFF);
axp.setPowerOutPut(AXP192_EXTEN, AXP202_OFF);
delay(20);
esp_sleep_enable_timer_wakeup(TX_INTERVAL * 1000000);
esp_deep_sleep_start();
do_send(&sendjob);
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"));
/* Start power controller */
Wire.begin(21, 22);
Serial.println("Starting AXP192 power controller");
if (!axp.begin(Wire, AXP192_SLAVE_ADDRESS)) {
Serial.println("AXP192 started");
} else {
Serial.println("AXP192 failed");
}
axp.setPowerOutPut(AXP192_LDO2, AXP202_ON); // Lora on T-Beam V1.x
axp.setPowerOutPut(AXP192_LDO3, AXP202_ON); // Gps on T-Beam V1.x
axp.setPowerOutPut(AXP192_DCDC2, AXP202_ON);
axp.setPowerOutPut(AXP192_EXTEN, AXP202_ON);
axp.setPowerOutPut(AXP192_DCDC1, AXP202_ON); // OLED on T-Beam v1.x
axp.setDCDC1Voltage(3300);
axp.setChgLEDMode(AXP20X_LED_BLINK_1HZ);
axp.adc1Enable(AXP202_BATT_CUR_ADC1, 1);
//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();
#ifdef USE_OTAA
esp_reset_reason_t reason = esp_reset_reason();
if ((reason == ESP_RST_DEEPSLEEP) || (reason == ESP_RST_SW))
{
LMIC_setSession(0x1, otaaDevAddr, otaaNetwKey, otaaApRtKey);
}
#else // ABP
LMIC_setSession (0x1, DEVADDR, NWKSKEY, APPSKEY);
// TTN uses SF9 for its RX2 window.
LMIC.dn2Dr = DR_SF9;
// Disable link check validation
LMIC_setLinkCheckMode(0);
#endif
// This must be done AFTER calling LMIC_setSession !
setOrRestorePersistentCounters();
#ifdef CFG_eu868
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
#endif
#ifdef CFG_us915
LMIC_selectSubBand(1);
//Disable FSB2-8, channels 16-72
for (int i = 16; i < 73; i++) {
if (i != 10)
LMIC_disableChannel(i);
}
#endif
// 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();
}