Moteino LoRa

Introducció

Requeriments

Exemple

/*

MOTEINO TTN EU NODE - ABP mode

Copyright (C) 2016-2018
Xose Pérez <xose dot perez at gmail dot com>
for The Things Network Catalunya Wiki (http://thethingsnetwork.cat)
Based on LMIC library example

This sketch send an incrementing number every minute

// -----------------------------------------------------------------------------

Requirements:

* This sketch requires LMIC library by Matthijs Kooijman
  https://github.com/matthijskooijman/arduino-lmic

* Tested on Moteino LoRa (https://lowpowerlab.com/shop/product/99)
  but you will have to wire the folowing extra pins from the
  RFM95 module to Moteino ports:

  RFM95     Moteino
  --------  --------
  RESET     D4
  DIO1      D5
  DIO2      D6

RFM95 module pinout (top view, with the chip facing you) and the corresponding
Moteino PIN connected (wire the ones marked with an asterisk *)

        |-------------|
    GND | GND    DIO2 | D6*
    D12 | MISO   DIO1 | D5*
    D11 | MOSI   DIO0 | D2
    D13 | SCK     3V3 | 3V3
    D10 | NSS    DIO4 |
    *D4 | RESET  DIO3 |
        | DIO5    GND | GND
    GND | GND     ANT |
        |-------------|

// -----------------------------------------------------------------------------

This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program.  If not, see <http://www.gnu.org/licenses/>.

*/

#include <Arduino.h>
#include <lmic.h>
#include <hal/hal.h>
#include <SPI.h>

#ifndef CFG_eu868
    #error "This script is meant to connect to TTN EU network at 868MHz"
#endif

// -----------------------------------------------------------------------------
// Configuration
// -----------------------------------------------------------------------------

#define SERIAL_BAUD         115200
#define TX_INTERVAL         60

// ABP - Change to match your application configuration
static const u1_t PROGMEM NWKSKEY[16] = { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 };
static const u1_t PROGMEM APPSKEY[16] = { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 };
static const u4_t DEVADDR = 0x00000000;

// Pin mapping (see hardware changes above)
const lmic_pinmap lmic_pins = {
    .nss = 10,                  // NSS pin
    .rxtx = LMIC_UNUSED_PIN,
    .rst = 4,                   // RESET pin
    .dio = {2, 5, 6},           // DIO0, DIO1 and DIO2
};

// -----------------------------------------------------------------------------
// Globals
// -----------------------------------------------------------------------------

// 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) { }

// Job
static osjob_t sendjob;

// Value
unsigned long autoincrement = 0;

// -----------------------------------------------------------------------------
// LMIC
// -----------------------------------------------------------------------------

void ttnSend(osjob_t* j){

    // Check if there is not a current TX/RX job running
    if (LMIC.opmode & OP_TXRXPEND) {
        Serial.println(F("[TTN] Pending message"));
        return;
    }

    // Prepare buffer
    unsigned char data[4];
    data[0] = (autoincrement >> 24) & 0xFF;
    data[1] = (autoincrement >> 16) & 0xFF;
    data[2] = (autoincrement >>  8) & 0xFF;
    data[3] = (autoincrement >>  0) & 0xFF;

    // Prepare upstream data transmission at the next possible time.
    // Parameters are port, data, length, confirmed
    LMIC_setTxData2(1, data, 4, 0);

    Serial.println(F("[TTN] Packet queued"));

    // Next TX is scheduled after TX_COMPLETE event.
    autoincrement++;

}

// LMIC library will call this method when an event is fired
void onEvent(ev_t ev) {

    if (ev == EV_TXCOMPLETE) {

        Serial.println(F("[TTN] Packet sent"));

        if (LMIC.txrxFlags & TXRX_ACK) {
            Serial.println(F("[TTN] ACK Received"));
        }

        if (LMIC.dataLen) {
            Serial.print(F("[TTN] Received "));
            Serial.print(LMIC.dataLen);
            Serial.println(F(" bytes of payload"));
        }

        // Schedule next transmission
        os_setTimedCallback(&sendjob, os_getTime() + sec2osticks(TX_INTERVAL), ttnSend);

    }

}

void ttnSetup() {

    // 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.
    // 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);

    // 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 for uplink (note: txpow seems to be ignored by the library)
    LMIC_setDrTxpow(DR_SF7, 14);

    // Start job
    ttnSend(&sendjob);

}

// -----------------------------------------------------------------------------
// Main methods
// -----------------------------------------------------------------------------

void setup() {

    // Init serial port for debugging
    Serial.begin(115200);
    Serial.println("[MAIN] Startup");

    // Init LMIC library to work with TTN EU
    ttnSetup();

}

void loop() {

    // Keeps track of the scheduled jobs
    os_runloop_once();

}