Imported calculate, sendmysql to restserver

RestServer/calculate.c

@@ -0,0 +1,80 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <math.h> /* link against math lib */
+#include "calculate.h"
+
+#define R 8314.3 //J/(kmol*K) (universelle Gaskonstante)
+#define mw 18.016 //kg/kmol (Molekulargewicht des Wasserdampfes)
+
+/*
+Bezeichnungen:
+r = relative Luftfeuchte
+T = Temperatur in °C
+TK = Temperatur in Kelvin (TK = T + 273.15)
+TD = Taupunkttemperatur in °C
+DD = Dampfdruck in hPa
+SDD = Sättigungsdampfdruck in hPa
+
+Parameter:
+a = 7.5, b = 237.3 für T >= 0
+a = 7.6, b = 240.7 für T < 0 über Wasser (Taupunkt)
+a = 9.5, b = 265.5 für T < 0 über Eis (Frostpunkt)
+
+R* = 8314.3 J/(kmol*K) (universelle Gaskonstante)
+mw = 18.016 kg/kmol (Molekulargewicht des Wasserdampfes)
+AF = absolute Feuchte in g Wasserdampf pro m3 Luft
+
+Formeln:
+
+    SDD(T) = 6.1078 * 10^((a*T)/(b+T))
+    DD(r,T) = r/100 * SDD(T)
+    r(T,TD) = 100 * SDD(TD) / SDD(T)
+    TD(r,T) = b*v/(a-v) mit v(r,T) = log10(DD(r,T)/6.1078)
+    AF(r,TK) = 10^5 * mw/R* * DD(r,T)/TK; AF(TD,TK) = 10^5 * mw/R* * SDD(TD)/TK
+*/
+
+static float sdd(float temperature) {
+  //select constant based on input temperature
+  float a = 7.5, b = 237.3;
+  if (temperature >= 0) {
+    a = 7.6;
+    b = 240.7;
+  }
+  return 6.1078 * pow(10, (a * temperature) / (b + temperature));
+}
+
+static float dd(float relativeHumidity, float temperature) {
+  return relativeHumidity / 100 * sdd(temperature);
+}
+
+/* CURRENTLY UNUSED
+
+static float r(float temperature, float dewTemperature) {
+  // This is optional. Necessary with dew point measurements.
+  return 100 * sdd(dewTemperature) / sdd(temperature);
+}
+
+static float v(float relativeHumidity, float temperature) {
+  log10(dd(relativeHumidity, temperature)/6.1078);
+}
+
+static float td(float relativeHumidity, float temperature) {
+  //select constant based on input temperature
+  float a = 7.5, b = 237.3;
+  if (temperature >= 0) {
+    a = 7.6;
+    b = 240.7;
+  }
+  return b * v(relativeHumidity, temperature) / (a - v(relativeHumidity, temperature));
+}
+*/
+static float af(float relativeHumidity, float temperature) {
+    float tk = temperature + 273.15;
+    return pow(10, 5) * mw/R * dd(relativeHumidity, temperature) / tk;
+}
+
+float absoluteHumidityFloat(float temperature, float humidity) {
+    return af(humidity, temperature);
+}
+
+  

RestServer/calculate.h

@@ -0,0 +1,6 @@
+#ifndef calculate_H
+#define calculate_H
+
+float absoluteHumidityFloat(float temperature, float humidity);
+
+#endif

RestServer/main.c

@@ -1,13 +1,13 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
-
-
-
 #include <sys/socket.h>
 #include <netinet/in.h>
 #include <arpa/inet.h>
 
+#include "sendmysql.h"
+#include "calculate.h"
+
 #define U_DISABLE_CURL
 #define U_DISABLE_WEBSOCKET
 #include <ulfius.h>
@@ -76,19 +76,18 @@ char * read_file(const char * filename) {
   }
 }
 
-int callback_all_test_foo (const struct _u_request * request, struct _u_response * response, void * user_data) {
+int callback_absTempHum(const struct _u_request *request, struct _u_response *response, void *user_data) {
-    //char * url_params = print_map(request->map_url);
+
-    //char * response_body = msprintf("parameters from the url are \n%s\n\n",
-                                    //url_params);
     int i; 
     float temphum[2];
     const char **keys;
     keys = u_map_enum_keys(request->map_url);
     
     for (i = 0; i < 2; i++) {
-        temphum[i] = atoi(u_map_get(request->map_url, keys[i]));
+        temphum[i] = atof(u_map_get(request->map_url, keys[i]));
     }
-    char *response_body = msprintf("Temp: %f, Hum: %f",temphum[0], temphum[1]);
+    char *response_body = msprintf("Temp: %f, Hum: %f, absHum: %f",temphum[0], temphum[1], absoluteHumidityFloat(temphum[0], temphum[1]));
+    insertData(1, temphum[0], temphum[1], 0);
     
     ulfius_set_string_body_response(response, 200, response_body);
     //o_free(url_params);
@@ -99,7 +98,6 @@ int callback_all_test_foo (const struct _u_request * request, struct _u_response
 
 
 int main(void) {
-    
     struct _u_instance instance;
     
     // Initialize instance with the port number
@@ -108,11 +106,9 @@ int main(void) {
         return(1);
     }
     
-     instance.max_post_body_size = 1024;
-    
     // Endpoint list declaration
     ulfius_add_endpoint_by_val(&instance, "GET", "/welcome", NULL, 0, &callback_welcome, NULL);
-    ulfius_add_endpoint_by_val(&instance, "GET", PREFIX, "/:temp/:hum", 0, &callback_all_test_foo, NULL);
+    ulfius_add_endpoint_by_val(&instance, "GET", PREFIX, "/:temp/:hum", 0, &callback_absTempHum, NULL);
     
     // Start the framework
     if (ulfius_start_framework(&instance) == U_OK) {

RestServer/makefile

@@ -7,7 +7,7 @@ CFLAGS  = -Wall -g -D_GNU_SOURCE -D_REENTRANT -DVERSION=\"$(VERSION)\" `mysql_co
 #LDFLAGS = -lm -lpthread `gtk-config --cflags` `gtk-config --libs` -lgthread
 LDFLAGS = `mysql_config --libs` -lm -lulfius -lyder -lorcania
 
-OBJ = main.o
+OBJ = main.o calculate.o sendmysql.o
 
 dht22: $(OBJ)
 	$(CC) $(CFLAGS) -o humidityserver $(OBJ) $(LDFLAGS)

RestServer/sendmysql.c

@@ -0,0 +1,106 @@
+ /* Simple C program that connects to MySQL Database server*/
+#include <mysql/mysql.h>
+//#define _GNU_SOURCE
+#include <stdio.h>
+#include <stdlib.h>
+#include "calculate.h"
+#include "sendmysql.h"
+
+void insertData(int node_id, float temperature, float humidity, int isoutside) {
+    int pin = 0;
+    MYSQL *conn;
+    //MYSQL_RES *res;
+    //MYSQL_ROW row;
+    
+    char *server = "localhost";
+    char *user = "dhtuser";
+    char *password = "raspberry"; /* set me first */
+    char *database = "dhtstats";
+    
+    conn = mysql_init(NULL);
+    
+    /* Connect to database */
+    if (!mysql_real_connect(conn, server, user, password, database, 0, NULL, 0)) {
+        fprintf(stderr, "%s\n", mysql_error(conn));
+        exit(1);
+    }
+    
+    char *pquerystring = NULL;
+    
+    if (-1 == asprintf(&pquerystring, 
+        "INSERT INTO stats (node_id, pin, humidity, temperature, isoutside, gm3) VALUES (%i, %i, %f, %f, %i, %f)", node_id, pin, humidity, temperature, isoutside, absoluteHumidityFloat(temperature, humidity))) {
+        perror("asprintf() failed");
+        } else {
+            if (mysql_query(conn, pquerystring)) {
+                fprintf(stderr, "%s\n", mysql_error(conn));
+                free(pquerystring);
+                exit(1);
+            }
+        }
+        
+        free(pquerystring);
+        pquerystring = NULL;
+        
+        /* close connection */
+        //mysql_free_result(res);
+        mysql_close(conn);
+}
+
+
+
+
+
+
+void insertDataAverages(float temperature, float humidity, float gm3, int isoutside) {
+   MYSQL *conn;
+   //MYSQL_RES *res;
+   //MYSQL_ROW row;
+
+   char *server = "localhost";
+   char *user = "dhtuser";
+   char *password = "raspberry"; /* set me first */
+   char *database = "dhtstats";
+
+   conn = mysql_init(NULL);
+
+   /* Connect to database */
+   if (!mysql_real_connect(conn, server,
+         user, password, database, 0, NULL, 0)) {
+      fprintf(stderr, "%s\n", mysql_error(conn));
+      exit(1);
+   }
+    
+    /*
+   // send SQL query 
+   if (mysql_query(conn, "show tables")) {
+      fprintf(stderr, "%s\n", mysql_error(conn));
+      exit(1);
+   }
+
+   res = mysql_use_result(conn);
+
+   // output table name 
+   printf("MySQL Tables in mysql database:\n");
+   while ((row = mysql_fetch_row(res)) != NULL)
+      printf("%s \n", row[0]);
+    */
+   
+    char *pquerystring = NULL;
+    if (-1 == asprintf(&pquerystring, 
+    "INSERT INTO average_stats (humidity, temperature, gm3, isoutside) VALUES (%f, %f, %f, %i)", humidity, temperature, absoluteHumidityFloat(temperature, humidity), isoutside)) {
+        perror("asprintf() failed");
+    } else {
+        if (mysql_query(conn, pquerystring)) {
+            fprintf(stderr, "%s\n", mysql_error(conn));
+            free(pquerystring);
+            exit(1);
+        }
+    }
+
+    free(pquerystring);
+    pquerystring = NULL;
+    
+   /* close connection */
+   //mysql_free_result(res);
+   mysql_close(conn);
+}

RestServer/sendmysql.h

@@ -0,0 +1,3 @@
+
+void insertData(int node_id, float temperature, float humidity, int isoutside); 
+void insertDataAverages(float temperature, float humidity, float gm3, int isoutside);