/******************************************************************************* * 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 The Things Network. * * This uses ABP (Activation-by-personalisation), where a DevAddr and * Session keys are preconfigured (unlike OTAA, where a DevEUI and * application key is configured, while the DevAddr and session keys are * assigned/generated in the over-the-air-activation procedure). * * Note: LoRaWAN per sub-band duty-cycle limitation is enforced (1% in * g1, 0.1% in g2), but not the TTN fair usage policy (which is probably * violated by this sketch when left running for longer)! * * To use this sketch, first register your application and device with * the things network, to set or generate a DevAddr, NwkSKey and * AppSKey. Each device should have their own unique values for these * fields. * * Do not forget to define the radio type correctly in config.h. * *******************************************************************************/ #include #include #include #include #include #define BUILTIN_LED 25 #include #define TRIG_PIN 17 #define ECHO_PIN 23 HCSR04 hcsr04(TRIG_PIN, ECHO_PIN, 20, 4000); // the OLED used U8X8_SSD1306_128X64_NONAME_SW_I2C u8x8(/* clock=*/ 15, /* data=*/ 4, /* reset=*/ 16); // LoRaWAN NwkSKey, network session key // This is the default Semtech key, which is used by the early prototype TTN // network. static const PROGMEM u1_t NWKSKEY[16] = { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 }; // LoRaWAN AppSKey, application session key // This is the default Semtech key, which is used by the early prototype TTN // network. static const u1_t PROGMEM APPSKEY[16] = { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 }; // LoRaWAN end-device address (DevAddr) static const u4_t DEVADDR = 0x25011E01; // <-- 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) { } // TTN array byte mydata[2]; // size is 2 static osjob_t sendjob; // Schedule TX every this many seconds (might become longer due to duty // cycle limitations). const unsigned TX_INTERVAL = 15; // Pin mapping const lmic_pinmap lmic_pins = { .nss = 18, .rxtx = LMIC_UNUSED_PIN, .rst = 14, .dio = {26, 33, 32}, }; void onEvent (ev_t ev) { Serial.print(os_getTime()); u8x8.setCursor(0, 5); u8x8.printf("TIME %lu", os_getTime()); Serial.print(": "); switch(ev) { case EV_SCAN_TIMEOUT: Serial.println(F("EV_SCAN_TIMEOUT")); u8x8.drawString(0, 7, "EV_SCAN_TIMEOUT"); break; case EV_BEACON_FOUND: Serial.println(F("EV_BEACON_FOUND")); u8x8.drawString(0, 7, "EV_BEACON_FOUND"); break; case EV_BEACON_MISSED: Serial.println(F("EV_BEACON_MISSED")); u8x8.drawString(0, 7, "EV_BEACON_MISSED"); break; case EV_BEACON_TRACKED: Serial.println(F("EV_BEACON_TRACKED")); u8x8.drawString(0, 7, "EV_BEACON_TRACKED"); break; case EV_JOINING: Serial.println(F("EV_JOINING")); u8x8.drawString(0, 7, "EV_JOINING"); break; case EV_JOINED: Serial.println(F("EV_JOINED")); u8x8.drawString(0, 7, "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")); u8x8.drawString(0, 7, "EV_RFUI"); break; case EV_JOIN_FAILED: Serial.println(F("EV_JOIN_FAILED")); u8x8.drawString(0, 7, "EV_JOIN_FAILED"); break; case EV_REJOIN_FAILED: Serial.println(F("EV_REJOIN_FAILED")); u8x8.drawString(0, 7, "EV_REJOIN_FAILED"); break; case EV_TXCOMPLETE: Serial.println(F("EV_TXCOMPLETE (includes waiting for RX windows)")); u8x8.drawString(0, 7, "EV_TXCOMPLETE"); digitalWrite(BUILTIN_LED, LOW); if (LMIC.txrxFlags & TXRX_ACK) Serial.println(F("Received ack")); u8x8.drawString(0, 7, "Received ACK"); if (LMIC.dataLen) { Serial.println(F("Received ")); u8x8.drawString(0, 6, "RX "); Serial.println(LMIC.dataLen); u8x8.setCursor(4, 6); u8x8.printf("%i bytes", LMIC.dataLen); Serial.println(F(" bytes of payload")); u8x8.setCursor(0, 7); u8x8.printf("RSSI %d SNR %.1d", LMIC.rssi, LMIC.snr); } // Schedule next transmission os_setTimedCallback(&sendjob, os_getTime()+sec2osticks(TX_INTERVAL), do_send); break; case EV_LOST_TSYNC: Serial.println(F("EV_LOST_TSYNC")); u8x8.drawString(0, 7, "EV_LOST_TSYNC"); break; case EV_RESET: Serial.println(F("EV_RESET")); u8x8.drawString(0, 7, "EV_RESET"); break; case EV_RXCOMPLETE: // data received in ping slot Serial.println(F("EV_RXCOMPLETE")); u8x8.drawString(0, 7, "EV_RXCOMPLETE"); break; case EV_LINK_DEAD: Serial.println(F("EV_LINK_DEAD")); u8x8.drawString(0, 7, "EV_LINK_DEAD"); break; case EV_LINK_ALIVE: Serial.println(F("EV_LINK_ALIVE")); u8x8.drawString(0, 7, "EV_LINK_ALIVE"); break; default: Serial.println(F("Unknown event")); u8x8.setCursor(0, 7); u8x8.printf("UNKNOWN EVENT %d", 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")); u8x8.drawString(0, 7, "OP_TXRXPEND, not sent"); } else { // Prepare upstream data transmission at the next possible time. // TTN data LMIC_setTxData2(1, mydata, sizeof(mydata), 0); Serial.println(F("Packet queued")); u8x8.drawString(0, 7, "PACKET QUEUED"); } // Next TX is scheduled after TX_COMPLETE event. } void setup() { Serial.begin(115200); Serial.println(F("Starting")); u8x8.begin(); u8x8.setFont(u8x8_font_chroma48medium8_r); // u8x8.drawString(0, 1, "LoRaWAN LMiC TTN Node..."); SPI.begin(5, 19, 27); // 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 #if defined(CFG_eu868) // 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. // NA-US channels 0-71 are configured automatically // 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. #elif defined(CFG_us915) // NA-US channels 0-71 are configured automatically // but only one group of 8 should (a subband) should be active // TTN recommends the second sub band, 1 in a zero based count. // https://github.com/TheThingsNetwork/gateway-conf/blob/master/US-global_conf.json LMIC_selectSubBand(1); #endif // 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); // Start job do_send(&sendjob); } void loop() { os_runloop_once(); // Output the distance in mm Serial.println(hcsr04.distanceInMillimeters()); // TTN data int distance = hcsr04.distanceInMillimeters(); mydata[0] = highByte(distance); mydata[1] = lowByte(distance); // Output information about the device, driver, and distance in Bifrost JSON format Serial.println(hcsr04.ToString()); // u8x8.drawString(0, 1, "test"); u8x8.setCursor(0, 1); u8x8.println(hcsr04.distanceInMillimeters()); delay(500); }