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small_tel/Daemons/weatherdaemon_multimeteo/mainweather.c

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/*
* This file is part of the weatherdaemon project.
* Copyright 2026 Edward V. Emelianov <edward.emelianoff@gmail.com>.
*
* 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/>.
*/
// collect here weather from all weatherstations sorted by importance
#include <usefull_macros.h>
#include "mainweather.h"
#include "sensors.h"
#include "weathlib.h"
// wind speed history array size (not less than for one hour)
#define MAX_HISTORY 3600
// throw out data older than 24 hours
#define TOO_OLD_DATA 86400
// one hour
#define T_ONE_HOUR 3600
static pthread_mutex_t datamutex = PTHREAD_MUTEX_INITIALIZER;
static int Forbidden = 0;
// index of meteodata in array
enum{
NWIND,
NWINDMAX,
NWINDMAX1,
NWINDDIR,
NWINDDIR1,
NWINDDIR2,
NHUMIDITY,
NABM_TEMP,
NPRESSURE,
NPRECIP,
NPRECIP_LEVEL,
NMIST,
NCLOUDS,
NSKYTEMP,
NCOMMWEATH,
NLASTAHTUNG,
NAMOUNT_OF_DATA
};
static val_t collected_data[NAMOUNT_OF_DATA] = {
[NWIND] = {.sense = VAL_OBLIGATORY, .type = VALT_FLOAT, .meaning = IS_WIND},
[NWINDMAX] = {.sense = VAL_OBLIGATORY, .type = VALT_FLOAT, .meaning = IS_OTHER, .name = "WINDMAX", .comment = "Maximal wind speed for last 24 hours"},
[NWINDMAX1] = {.sense = VAL_OBLIGATORY, .type = VALT_FLOAT, .meaning = IS_OTHER, .name = "WINDMAX1", .comment = "Maximal wind speed for last hour"},
[NWINDDIR] = {.sense = VAL_OBLIGATORY, .type = VALT_FLOAT, .meaning = IS_WINDDIR},
[NWINDDIR1] = {.sense = VAL_OBLIGATORY, .type = VALT_FLOAT, .meaning = IS_OTHER, .name = "WINDDIR1", .comment = "Mean wind speed direction for last hour"},
[NWINDDIR2] = {.sense = VAL_OBLIGATORY, .type = VALT_FLOAT, .meaning = IS_OTHER, .name = "WINDDIR2", .comment = "Mean wind speed^2 direction for last hour"},
[NHUMIDITY] = {.sense = VAL_OBLIGATORY, .type = VALT_FLOAT, .meaning = IS_HUMIDITY},
[NABM_TEMP] = {.sense = VAL_OBLIGATORY, .type = VALT_FLOAT, .meaning = IS_AMB_TEMP},
[NPRESSURE] = {.sense = VAL_OBLIGATORY, .type = VALT_FLOAT, .meaning = IS_PRESSURE},
[NPRECIP] = {.sense = VAL_OBLIGATORY, .type = VALT_FLOAT, .meaning = IS_PRECIP},
[NPRECIP_LEVEL] = {.sense = VAL_OBLIGATORY, .type = VALT_INT, .meaning = IS_PRECIP_LEVEL},
[NMIST] = {.sense = VAL_OBLIGATORY, .type = VALT_INT, .meaning = IS_MIST},
[NCLOUDS] = {.sense = VAL_OBLIGATORY, .type = VALT_FLOAT, .meaning = IS_CLOUDS},
[NSKYTEMP] = {.sense = VAL_OBLIGATORY, .type = VALT_FLOAT, .meaning = IS_SKYTEMP},
[NCOMMWEATH] = {.value.i = 0, .sense = VAL_OBLIGATORY, .type = VALT_INT, .meaning = IS_OTHER, .name = "WEATHER", .comment = "Weather level (0 - good, 3 - obs. prohibited)"},
[NLASTAHTUNG] = {.value.i = 0, .sense = VAL_RECOMMENDED, .type = VALT_INT, .meaning = IS_OTHER, .name = "EVTTIME", .comment = "UNIX-time of last weather level increasing"},
// {.sense = VAL_OBLIGATORY, .type = VALT_FLOAT, .meaning = IS_OTHER},
};
typedef struct{
double array[MAX_HISTORY];
double sum;
} sumval_t;
typedef struct{
int write_idx;
sumval_t C; // (speed * cos(dir))
sumval_t C2; // (speed^2 * cos(dir))
sumval_t S; // (speed * sin(dir))
sumval_t S2; // (speed^2 * sin(dir))
} meanwinddir_t;
static meanwinddir_t winddirs = {0};
static double update_sum(sumval_t *sv, double newval, int oldidx){
double old = sv->array[oldidx];
sv->array[oldidx] = newval;
return (sv->sum += newval - old);
}
// add current value into floating array and recalculate mean speeds
// data mutex should be locked outside this function
static void wind_dir_add(double curspeed, double curdir, double *dir, double *dir2){
double C, S;
sincos(curdir * M_PI / 180., &S, &C);
double vS = curspeed * S, vC = curspeed * C, v2S = curspeed * vS, v2C = curspeed * vC;
int idx = winddirs.write_idx;
winddirs.write_idx = (idx + 1) % MAX_HISTORY;
// calculate sums
vS = update_sum(&winddirs.S, vS, idx);
vC = update_sum(&winddirs.C, vC, idx);
v2S = update_sum(&winddirs.S2, v2S, idx);
v2C = update_sum(&winddirs.C2, v2C, idx);
*dir = atan2(vS, vC) * 180. / M_PI;
*dir2 = atan2(v2S, v2C) * 180. / M_PI;
if(*dir < 0.) *dir += 360.;
if(*dir2 < 0.) *dir2 += 360.;
}
typedef struct{
double speeds[MAX_HISTORY];
time_t timestamps[MAX_HISTORY];
int write_idx; // index in `speeds` and `timestamps` for new value
int deq[MAX_HISTORY]; // array of indexes in queue
int deq_head, deq_tail; // queue's head and tail
} sliding_max_t;
static sliding_max_t windspeeds = {0};
static void add_windspeed(sliding_max_t *sm, double speed, time_t now) {
// Write new data portion into queue
int idx = sm->write_idx;
sm->speeds[idx] = speed;
sm->timestamps[idx] = now;
sm->write_idx = (idx + 1) % MAX_HISTORY;
// Remove values older than `TOO_OLD_DATA`
time_t cutoff = now - TOO_OLD_DATA;
while(sm->deq_head != sm->deq_tail && sm->timestamps[sm->deq[sm->deq_head]] < cutoff){
sm->deq_head = (sm->deq_head + 1) % MAX_HISTORY;
}
// Remove small values less than current
while(sm->deq_head != sm->deq_tail && sm->speeds[sm->deq[(sm->deq_tail - 1 + MAX_HISTORY) % MAX_HISTORY]] <= speed){
sm->deq_tail = (sm->deq_tail - 1 + MAX_HISTORY) % MAX_HISTORY;
}
// Add new index into queue
sm->deq[sm->deq_tail] = idx;
sm->deq_tail = (sm->deq_tail + 1) % MAX_HISTORY;
}
static double get_current_max(sliding_max_t *sm){
if(sm->deq_head == sm->deq_tail) return 0.0; // No data
return sm->speeds[sm->deq[sm->deq_head]];
}
static double get_max_forT(sliding_max_t *sm, time_t tcutoff){
if(sm->deq_head == sm->deq_tail) return 0.0; // No data
int idx = sm->deq_head;
while(idx != sm->deq_tail && sm->timestamps[sm->deq[sm->deq_head]] < tcutoff){
idx = (idx + 1) % MAX_HISTORY;
}
if(idx == sm->deq_tail) return 0.0; // No fresh data
return sm->speeds[sm->deq[idx]];
}
int collected_amount(){
return NAMOUNT_OF_DATA;
}
int get_collected(val_t *val, int N){
if(!val || N < 0 || N >= NAMOUNT_OF_DATA){
DBG("Wrong number (%d) requested or no place for data", N);
return FALSE;
}
pthread_mutex_lock(&datamutex);
DBG("Copied data of %d", N);
*val = collected_data[N];
pthread_mutex_unlock(&datamutex);
return TRUE;
}
static void fix_new_data(val_t *collected, val_t *fresh){
FNAME();
if(!collected || !fresh) return;
collected->time = fresh->time;
if(collected->type == fresh->type){ // good case
collected->value = fresh->value;
return;
}
// bad case: have different types
switch(collected->type){
case VALT_UINT:
switch(fresh->type){
case VALT_INT:
collected->value.u = (uint32_t) collected->value.i;
break;
case VALT_FLOAT:
collected->value.u = (uint32_t) collected->value.f;
default: break;
}
break;
case VALT_INT:
switch(fresh->type){
case VALT_UINT:
collected->value.i = (int32_t) collected->value.u;
break;
case VALT_FLOAT:
collected->value.i = (int32_t) collected->value.f;
default: break;
}
break;
case VALT_FLOAT:
switch(fresh->type){
case VALT_UINT:
collected->value.f = (float) collected->value.u;
break;
case VALT_INT:
collected->value.f = (float) collected->value.i;
default: break;
}
break;
}
}
static void chkweatherlevel(int *curlevel, double curvalue, weather_cond_t *curcond, int *ahtungtime){
double good = curcond->good, bad = curcond->bad, terrible = curcond->terrible;
if(curcond->negflag){ // negate
curvalue = -curvalue;
good = -good;
bad = -bad;
terrible = -terrible;
}
int newlevel = -1;
if(curvalue > terrible) newlevel = WEATHER_TERRIBLE;
else if(curvalue > bad) newlevel = WEATHER_BAD;
else if(curvalue < good) newlevel = WEATHER_GOOD;
if(newlevel == -1) return;
time_t curt = time(NULL);
if(newlevel > *curlevel){
DBG("newlevel: %d, current: %d INCREASED", newlevel, *curlevel);
*curlevel = newlevel;
if(*ahtungtime < curt) *ahtungtime = (int) curt; // refresh event time
}else if(newlevel < *curlevel){ // check timeout to make level lower
if(curt - *ahtungtime > WeatherConf.ahtung_delay){
DBG("newlevel: %d, current: %d DECREASED", newlevel, *curlevel);
*curlevel = newlevel;
}
}
}
void refresh_sensval(sensordata_t *s){
FNAME();
static time_t poll_time = 0;
val_t value;
if(!s || !s->get_value) return;
if(poll_time == 0) poll_time = get_pollT();
int curlevel = collected_data[NCOMMWEATH].value.i;
int curahtungtime = collected_data[NLASTAHTUNG].value.i;
time_t curtime = time(NULL);
double dir = -100., dir2 = -100.; // mean wind directions
DBG("%d meteo values", s->Nvalues);
for(int i = 0; i < s->Nvalues; ++i){
DBG("Try to get %dth value", i);
if(!s->get_value(s, &value, i)) continue;
DBG("got value");
int idx = -1;
double curvalue;
weather_cond_t *curcond = NULL;
switch(value.meaning){
case IS_WIND:
idx = NWIND;
curvalue = (double) value.value.f;
curcond = &WeatherConf.wind;
add_windspeed(&windspeeds, curvalue, curtime);
break;
case IS_WINDDIR:
idx = NWINDDIR;
wind_dir_add(collected_data[NWIND].value.f, value.value.f, &dir, &dir2);
break;
case IS_HUMIDITY:
idx = NHUMIDITY;
curvalue = (double) value.value.f;
curcond = &WeatherConf.humidity;
break;
case IS_AMB_TEMP:
idx = NABM_TEMP;
break;
case IS_PRESSURE:
idx = NPRESSURE;
break;
case IS_PRECIP:
idx = NPRECIP;
if(value.value.i && curlevel < WEATHER_TERRIBLE){
curlevel = WEATHER_TERRIBLE;
curahtungtime = curtime;
}
break;
case IS_PRECIP_LEVEL:
idx = NPRECIP_LEVEL;
break;
case IS_MIST:
idx = NMIST;
if(value.value.i && curlevel < WEATHER_TERRIBLE){
curahtungtime = curtime;
curlevel = WEATHER_TERRIBLE;
}
break;
case IS_CLOUDS:
idx = NCLOUDS;
curvalue = (double) value.value.f;
curcond = &WeatherConf.clouds;
break;
case IS_SKYTEMP:
idx = NSKYTEMP;
curvalue = (double) value.value.f;
curcond = &WeatherConf.sky;
break;
default : break;
}
if(idx < 0 || idx >= NAMOUNT_OF_DATA) continue;
DBG("IDX=%d", idx);
time_t freshdelay = (s->PluginNo == 0) ? 0 : poll_time; // use data of less imrortant plugins only if our data is too old
time_t curmt = collected_data[idx].time + freshdelay;
if(value.time < curmt){
DBG("Data too old (value: %zd, curr: %zd", value.time, curmt);
continue; // old data
}
pthread_mutex_lock(&datamutex);
fix_new_data(&collected_data[idx], &value);
pthread_mutex_unlock(&datamutex);
if(!Forbidden && curcond) chkweatherlevel(&curlevel, curvalue, curcond, &curahtungtime);
}
pthread_mutex_lock(&datamutex);
// refresh max
if(dir >= 0.){
collected_data[NWINDDIR1].value.f = (float) dir;
collected_data[NWINDDIR1].time = curtime;
}
if(dir2 >= 0.){
collected_data[NWINDDIR2].value.f = (float) dir2;
collected_data[NWINDDIR2].time = curtime;
}
collected_data[NWINDMAX].value.f = (float) get_current_max(&windspeeds);
collected_data[NWINDMAX].time = curtime;
collected_data[NWINDMAX1].value.f = (float) get_max_forT(&windspeeds, curtime - T_ONE_HOUR);
collected_data[NWINDMAX1].time = curtime;
DBG("check ahtung");
if(Forbidden) collected_data[NCOMMWEATH].value.i = WEATHER_PROHIBITED;
else collected_data[NCOMMWEATH].value.i = curlevel;
if(collected_data[NLASTAHTUNG].value.i < curahtungtime) collected_data[NLASTAHTUNG].value.i = curahtungtime;
collected_data[NCOMMWEATH].time = curtime;
collected_data[NLASTAHTUNG].time = curtime;
pthread_mutex_unlock(&datamutex);
DBG("Refreshed");
}
void forbid_observations(int f){
if(f) Forbidden = 1;
else Forbidden = 0;
}
#if 0
// main cycle
void run_mainweather(){
int N = get_nplugins();
if(N < 1) return;
poll_time = get_pollT();
while(1){
int nactive = 0;
pthread_mutex_lock(&datamutex);
for(int i = N-1; i > -1; --i){ // the most important is the last
sensordata_t *s = get_plugin(i);
if(!s || !sensor_alive(s)) continue;
++nactive;
}
pthread_mutex_unlock(&datamutex);
if(nactive == 0) break; // no active sensors
usleep(10000);
}
LOGERR("Main weather collector died: all sensors lost");
}
#endif
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