Modular ringbuffer and graph display

src/display.cpp

@@ -244,7 +244,7 @@ void display_screen_grid(float grid_power, float consum, float inv_power, float
 }
 
 //Graph last 100 values
-void display_screen_graph(float values[100])
+void display_screen_graph(float values[100], char* key, int buffersize)
 {
     logPrintD("Display graph...");
     display.firstPage();
@@ -263,7 +263,8 @@ void display_screen_graph(float values[100])
                 display.drawLine(i, 60, i, 62); //marker X
             }
 
-            for (int i = 0; i<126; i++)
+            //Data display
+            for (int i = 0; i<buffersize; i++)
             {
                 display.drawLine((10+i), 60, (10+i), map(values[i], 0, 1000, 60, 10));
             }

src/display.h

@@ -35,4 +35,4 @@ void display_header(char* TEXT);
 void display_screen_pv(float pv_voltage, float pv_wattage, float battery_voltage, float pv_amps, float pv_kwh);
 void display_screen_battery(float battery_voltage, float battery_amps, float battery_wattage, float battery_soc, float batt_cell_v_min, float batt_cell_v_max);
 void display_screen_grid(float grid_power, float consum, float inv_power, float inv_current, float pv_wattage);
-void display_screen_graph(float values[100]);
+void display_screen_graph(float values[100], char* key, int buffersize);

src/main.cpp

@@ -94,8 +94,11 @@ bool display_conf_time_present = false;
 bool display_conf_dc_pvcharger_present = false;
 bool display_conf_graph_pv_present = false;
 bool display_conf_statistics_present = false;
-float display_graph_ringbuffer[126] = { 0 };
-int display_graph_ringbuffer_index = 0;
+float display_graph_ringbuffer_load_1h[100] = { 0 };
+float display_graph_ringbuffer_load_24h[100] = { 0 };
+float display_graph_ringbuffer_pv_1h[100] = { 0 };
+float display_graph_ringbuffer_pv_24h[100] = { 0 };
+const int display_graph_buffersize = 100;
 int display_refresh_counter = 0;
 int display_refresh_time;
 
@@ -128,11 +131,10 @@ static unsigned long lastScreenChangeTime = 0;
 int display_screen = 0;
 
 //Display graph ringbuffer
-void display_graph_ringbuffer_add(float value) {
-  float tmp = value;
-  display_graph_ringbuffer[0] = value;
-  memmove(display_graph_ringbuffer,display_graph_ringbuffer+1,sizeof(int)*(125));
-   display_graph_ringbuffer[125] = tmp;
+void display_graph_ringbuffer_add(float ringbuffer [display_graph_buffersize], float value) {
+  ringbuffer[0] = value;
+  memmove(ringbuffer, ringbuffer + 1, sizeof(int)*(display_graph_buffersize - 1));
+  ringbuffer[display_graph_buffersize - 1] = value;
 }
 
 //MQTT topics
@@ -181,9 +183,6 @@ void callback(char* topic, byte* message, unsigned int length) {
     DynamicJsonDocument json(512);
     deserializeJson(json, messageTemp);
     grid_p = json["value"];
-
-    //add every measurement to rbuffer
-    display_graph_ringbuffer_add(grid_p);
   }
 
   //Inverter - power
@@ -648,7 +647,7 @@ void loop() {
     {
       if (display_conf_graph_pv_present)
       {
-        display_screen_graph(display_graph_ringbuffer);
+        display_screen_graph(display_graph_ringbuffer_load_1h, (char*)"1h", display_graph_buffersize);
       }
       else
       {