void aprsis_set_filter_string(aprsis_ctx *ctx, char *filter) {
// send a filter string, for more complex filters
if (ctx->sockfd != -1) {
char buf[64];
snprintf(buf, sizeof(buf), "#filter %s\n", filter);
g_message("Sending filter: %s", buf);
aprsis_write(ctx, buf, strlen(buf));
}
}
void aprsis_set_filter(aprsis_ctx *ctx, double latitude, double longitude, int radius) {
// sets a filter given latitude, longitude and radius
ctx->latitude = latitude;
ctx->longitude = longitude;
ctx->radius = radius;
if (ctx->sockfd != -1) {
char buf[64];
snprintf(buf, sizeof(buf), "#filter r/%.0f/%.0f/%d\n", latitude, longitude, radius);
g_message("Sending filter: %s", buf);
aprsis_write(ctx, buf, strlen(buf));
}
}
int aprsis_login(aprsis_ctx *ctx) {
// wait for prompt, send filter message
char buf[256];
int n;
// note that this doesn't *actually* check what the prompt is
n = aprsis_read(ctx, buf, 256);
if (n<0) {
g_error("couldn't read from socket");
}
g_message("got: %s",buf);
sprintf(buf, APRSIS_LOGIN"\n", ctx->user, ctx->pass);
g_message("sending: %s", buf);
aprsis_write(ctx, buf, strlen(buf));
n = aprsis_read(ctx, buf, 256);
if (n<0) {
g_error("couldn't read from socket");
}
g_message("got: %s",buf);
return 0;
}
static gboolean gpsd_data_cb(GIOChannel *src, GIOCondition condition, gpointer data) {
int ret;
char pbuf[256];
time_t now;
struct tm *ts;
char buf[80];
ret = gps_read(&gpsdata);
if (!isnan(gpsdata.fix.latitude)) {
lat = gpsdata.fix.latitude;
lon = gpsdata.fix.longitude;
}
if (!isnan(gpsdata.fix.speed)) speed=gpsdata.fix.speed*2.24;
if (!isnan(gpsdata.fix.track)) track=gpsdata.fix.track;
if ((beacon_time==0) || (secs_since_beacon<0)) {
printf("init beacon time\n");
beacon_time=gtime;
}
if(!isnan(gpsdata.fix.time)) gtime = gpsdata.fix.time;
if (gtime>next_time) {
printf("3 min point\n");
next_time = gtime+180;
}
#if 0
printf("\n===============================================\n");
printf("ssb: %f\ntime until beacon: %f\nbeacon_rate: %f\n", secs_since_beacon, beacon_rate-secs_since_beacon, beacon_rate);
printf("track: %f\noldtrack: %f\n", track, old_track);
printf("hcsb: %f\ntt: %f\nmtt: %f\n", hcsb, turn_threshold, min_turn_time);
#endif
// calculate smart beacon
secs_since_beacon = gtime-beacon_time;
if (speed < slow_speed) {
//printf("low speed = %f\n", speed);
beacon_rate = slow_rate;
} else {
if (speed > high_speed) {
//printf("high speed = %f\n", speed);
beacon_rate = fast_rate;
} else {
beacon_rate = fast_rate * high_speed/speed;
}
if (old_track == -1) old_track = track;
hcsb = fabs(track - old_track);
if (hcsb > 180) hcsb = 360 - hcsb;
turn_threshold = min_turn_angle + turn_slope / speed;
if (hcsb > turn_threshold && secs_since_beacon > min_turn_time) {
secs_since_beacon = beacon_rate;
}
}
if (secs_since_beacon >= beacon_rate) {
//printf("***************************************** BEACON\n");
printf("smart beacon\n");
now = (time_t) gtime;
ts = gmtime(&now);
strftime(buf, sizeof(buf), "%d%H%Mz", ts);
// char buf[256]="MM0YEQ-11>APZGJC:@112149z5551.30N/00430.60W$118/032/moving\r\n";
float latmin, lonmin;
latmin = (lat - trunc(lat))*60;
lonmin = -(lon - trunc(lon))*60;
printf("%f %f\n", lat, lon);
sprintf(pbuf, "MM0YEQ-10>APZGJC:@%s%02.0f%05.2fN/%03.0f%05.2fW$%03.0f/%03.0f/message\n", buf, trunc(lat),latmin,-trunc(lon),lonmin, track, speed);
if(&ctx !=0) {
printf("sending\n");
aprsis_write(&ctx, pbuf, strlen(pbuf));
}
printf("pbuf=%s\n", pbuf);
beacon_time = gtime;
old_track=track;
}
return TRUE;
}
