231 lines
6.6 KiB
C++
231 lines
6.6 KiB
C++
#include <lmic.h>
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#include <hal/hal.h>
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#include <TinyGPS++.h>
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#include <AltSoftSerial.h>
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// LoRaWAN NwkSKey, network session key
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static const PROGMEM u1_t NWKSKEY[16] = { 0x52, 0x92, 0xC0, 0x72, 0x2D, 0x3C, 0x55, 0x5E, 0xE4, 0xB9, 0x9E, 0x9B, 0x88, 0x66, 0x47, 0xF1 };
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// LoRaWAN AppSKey, application session key
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static const u1_t PROGMEM APPSKEY[16] = { 0xC4, 0x30, 0xEF, 0x56, 0x4F, 0x6D, 0xA2, 0x56, 0x1F, 0x15, 0x2F, 0xB8, 0x62, 0xC7, 0xCA, 0xC2 };
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// LoRaWAN end-device address (DevAddr)
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// See http://thethingsnetwork.org/wiki/AddressSpace
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// The library converts the address to network byte order as needed.
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#ifndef COMPILE_REGRESSION_TEST
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static const u4_t DEVADDR = 0x260212B6;
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#else
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static const u4_t DEVADDR = 0;
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#endif
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static osjob_t sendjob;
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// Schedule TX every this many seconds (might become longer due to duty
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// cycle limitations).
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const unsigned TX_INTERVAL = 10;
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// Pin mapping for Adafruit Feather M0 LoRa
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const lmic_pinmap lmic_pins = {
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.nss = 10,
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.rxtx = LMIC_UNUSED_PIN,
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.rst = 9,
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.dio = {2, 3, LMIC_UNUSED_PIN},
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};
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/****************************************************
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* Arduino drivers
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* - LoRaWAN
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* - GPS
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***************************************************/
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TinyGPSPlus gps;
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uint8_t general_int;
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#define isr general_int
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#define timeout general_int
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#define n_poly general_int
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/****************************************************
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* Track each pair of X and Y coordinates
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* - arrays are used by the pnpoly function
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***************************************************/
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const uint8_t N_POLY_MAX=10;
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float polyx[N_POLY_MAX*2+5];
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float * const polyy = polyx + N_POLY_MAX;
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/****************************************************
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* Check a pair of coordinates against two lists
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* of vertices
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* - https://wrf.ecse.rpi.edu//Research/Short_Notes/pnpoly.html
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***************************************************/
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const int pnpoly
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(const uint8_t nvert, const float *vertx, const float *verty, const float testx, const float testy)
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{
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uint8_t i, j, c = 0;
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for (i = 0, j = nvert-1; i < nvert; j = i++) {
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if ( ((verty[i]>testy) != (verty[j]>testy)) &&
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(testx < (vertx[j]-vertx[i]) * (testy-verty[i]) / (verty[j]-verty[i]) + vertx[i]) )
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c = !c;
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}
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return c;
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}
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/****************************************************
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* Test a coordinate against all vertices
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* - takes current GPS coordinates
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* - return 1 if in bounds
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***************************************************/
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const int check_bounds(const float x, const float y) {
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return pnpoly(n_poly, polyx, polyy, x, y);
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}
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/****************************************************
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* Load coordinates from protobuff stream
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* - currently a maximum of 10 coordinates
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* - loading arrays in nanopb does not appear
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* to work.
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***************************************************/
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void import_protobuf(const uint8_t *protobuffer, const uint32_t size) {
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if(size != 122) {
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Serial.println("nmd");
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return;
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}
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Serial.println("Recieved valid protobuf data?");
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isr = protobuffer[1];
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if(isr>N_POLY_MAX) isr = 0;
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const uint8_t *ptr = protobuffer + 5;
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for(uint8_t i=0;i<isr && i<N_POLY_MAX;i++) {
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memcpy(&polyx[i], ptr + i*12, 4);
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memcpy(&polyy[i], ptr + i*12+5, 4);
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Serial.print((int)polyx[i]);
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Serial.print(' ');
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Serial.print((int)polyy[i]);
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Serial.print('\n');
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}
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// n_poly = isr; - n_poly is isr
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}
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static volatile uint8_t is_sending = 0;
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void onEvent (ev_t ev) {
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// Serial.print(os_getTime());
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// Serial.print(": ");
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if(ev == EV_TXCOMPLETE) {
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Serial.println("EV_TXCOMPLETE (includes waiting for RX windows)");
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if (LMIC.dataLen) {
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Serial.println(F("Received "));
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import_protobuf(LMIC.frame + LMIC.dataBeg, LMIC.dataLen);
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}
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is_sending = 0;
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}
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else if(ev == EV_TXSTART) {
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Serial.println(F("EV_TXSTART"));
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}
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else {
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Serial.print(F("Unknown event: "));
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}
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}
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#define TYPE_STRING 0x0A
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#define TYPE_VARIANT 0x10
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#define PROTO_LEN 0x0A
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#define FIELD_ONE_FLOAT 0x0D
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#define FIELD_TWO_FLOAT 0x15
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#define FIELD_TWO_VARIANT 0x10
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const char oob[] = "OUT OF BOUNDS";
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const char inb[] = "IN BOUNDS";
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uint8_t buffer[] = {
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TYPE_STRING,
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PROTO_LEN,
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FIELD_ONE_FLOAT, 0x00, 0x00, 0x48, 0x43,
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FIELD_TWO_FLOAT, 0x00, 0x00, 0xc8, 0x42,
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FIELD_TWO_VARIANT, 0, 0};
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void do_send(osjob_t* j){
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// Check if there is not a current TX/RX job running
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if (LMIC.opmode & OP_TXRXPEND) {
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//Serial.println(F("OP_TXRXPEND, not sending"));
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} else {
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// prepare upstream data transmission at the next possible time.
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// transmit on port 1 (the first parameter); you can use any value from 1 to 223 (others are reserved).
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// don't request an ack (the last parameter, if not zero, requests an ack from the network).
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// Remember, acks consume a lot of network resources; don't ask for an ack unless you really need it.
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const float latitude = gps.location.lat();
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const float longitude = gps.location.lng();
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if(n_poly>0) {
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const uint8_t oob = !check_bounds(latitude, longitude);
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if(oob) {
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Serial.println(oob);
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} else {
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Serial.println(inb);
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}
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memcpy(buffer+13, (void*)&oob, 1);
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} else {
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const uint8_t oob = 0;
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memcpy(buffer+13, (void*)&oob, 1);
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}
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memcpy(buffer+3, (void*)&latitude, 4);
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memcpy(buffer+8, (void*)&longitude, 4);
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LMIC_setTxData2(1, buffer, sizeof(buffer)-1, 0);
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}
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}
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#define GPS_MAX_ENCODES 60
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void read_gps(){
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general_int = softserial_available();
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while(--general_int > 0) {
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gps.encode(softserial_read());
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}
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if(!is_sending && gps.location.isValid()) {
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Serial.println("gps");
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is_sending = 1;
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os_setTimedCallback(&sendjob, os_getTime()+sec2osticks(TX_INTERVAL), do_send);
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}
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}
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void setup() {
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Serial.begin(9600);
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softserial_init();
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delay(100);
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Serial.println(F("Starting"));
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// LMIC init
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os_init();
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// Reset the MAC state. Session and pending data transfers will be discarded.
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LMIC_reset();
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// Set static session parameters. Instead of dynamically establishing a session
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// by joining the network, precomputed session parameters are be provided.
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// On AVR, these values are stored in flash and only copied to RAM
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// once. Copy them to a temporary buffer here, LMIC_setSession will
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// copy them into a buffer of its own again.
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uint8_t appskey[sizeof(APPSKEY)];
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uint8_t nwkskey[sizeof(NWKSKEY)];
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memcpy_P(appskey, APPSKEY, sizeof(APPSKEY));
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memcpy_P(nwkskey, NWKSKEY, sizeof(NWKSKEY));
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LMIC_setSession (0x13, DEVADDR, nwkskey, appskey);
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LMIC_selectSubBand(1);
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// Disable link check validation
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LMIC_setLinkCheckMode(0);
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// TTN uses SF9 for its RX2 window.
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LMIC.dn2Dr = DR_SF9;
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// Set data rate and transmit power for uplink
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LMIC_setDrTxpow(DR_SF7,14);
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}
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void loop() {
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os_runloop_once();
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read_gps();
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}
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