Add multi-lanuage as per request

src/display.cpp

@@ -27,6 +27,7 @@
 #include <U8g2lib.h>
 
 #include <display.h>
+#include <lang.h>
 #include <screens.h>
 #include <pins.h>
 
@@ -35,6 +36,10 @@ U8G2_ST7920_128X64_F_HW_SPI display(U8G2_R2, LCD_CS, U8X8_PIN_NONE);
 //U8G2_ST7920_128X64_F_2ND_HW_SPI display(U8G2_R2, LCD_CS, U8X8_PIN_NONE);
 //U8G2_ST7920_128X64_F_SW_SPI display(U8G2_R2, LCD_E_SCLK, LCD_RW_SI, LCD_CS, U8X8_PIN_NONE); 
 
+char* title_pv;
+char* title_battery;
+char* title_grid;
+
 bool pv_charging = false;
 char* screenbuffer;
 
@@ -68,7 +73,7 @@ void display_logo_small() {
 void display_text(char* TEXT1, char* TEXT2) {
     display.firstPage();
     do {
-        display_header();
+        display_logo();
         display.drawStr(0,52, TEXT1);
         display.drawStr(0,60, TEXT2);
     } while ( display.nextPage() );
@@ -77,7 +82,7 @@ void display_text(char* TEXT1, char* TEXT2) {
 void display_text_fullscreen(char* TEXT1, char* TEXT2, char* TEXT3, char* TEXT4, char* TEXT5, char* TEXT6) {
     display.firstPage();
     do {
-        display_header_small();
+        display_logo_small();
         display.drawStr(0,20, TEXT1);
         display.drawStr(0,28, TEXT2);
         display.drawStr(0,36, TEXT3);

src/display.h

@@ -28,7 +28,7 @@ void display_logo();
 void display_logo_small();
 void display_text(char* TEXT1, char* TEXT2);
 void display_text_fullscreen(char* TEXT1, char* TEXT2, char* TEXT3, char* TEXT4, char* TEXT5, char* TEXT6);
-void display_header(char* TEXT)
+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 inv_power, float inv_current, float load_ph1, float load_ph2, float load_ph3, float pv_wattage);

src/lang.cpp

@@ -0,0 +1,42 @@
+/*
+;    Project:       ESP GLCD SOLAR MONITOR
+;    Date:          3rd Sep 2022
+;
+;    (C) 2022       Carsten Schmiemann
+;
+; Permission is hereby granted, free of charge, to any person obtaining a copy
+; of this software and associated documentation files (the "Software"), to deal
+; in the Software without restriction, including without limitation the rights
+; to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+; copies of the Software, and to permit persons to whom the Software is
+; furnished to do so, subject to the following conditions:
+;
+; The above copyright notice and this permission notice shall be included in
+; all copies or substantial portions of the Software.
+;
+; THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+; IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+; FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+; AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+; LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+; OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+; THE SOFTWARE.
+*/
+#include <lang.h>
+#include <cstring>
+
+void set_display_language(char lang[2])
+{
+    if (strcmp(lang,"de") == 0)
+    {
+        title_pv = (char*)"PV Module";
+        title_battery = (char*)"Batterie";
+        title_grid = (char*)"Netz";
+    }
+    else
+    {
+        title_pv = (char*)"PV modules";
+        title_battery = (char*)"Battery";
+        title_grid = (char*)"Grid overview";
+    }
+}

src/lang.h

@@ -0,0 +1,29 @@
+/*
+;    Project:       ESP GLCD SOLAR MONITOR
+;    Date:          3rd Sep 2022
+;
+;    (C) 2022       Carsten Schmiemann
+;
+; Permission is hereby granted, free of charge, to any person obtaining a copy
+; of this software and associated documentation files (the "Software"), to deal
+; in the Software without restriction, including without limitation the rights
+; to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+; copies of the Software, and to permit persons to whom the Software is
+; furnished to do so, subject to the following conditions:
+;
+; The above copyright notice and this permission notice shall be included in
+; all copies or substantial portions of the Software.
+;
+; THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+; IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+; FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+; AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+; LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+; OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+; THE SOFTWARE.
+*/
+extern char* title_pv;
+extern char* title_battery;
+extern char* title_grid;
+
+void set_display_language(char lang[2]);

src/main.cpp

@@ -45,6 +45,7 @@
 
 //Program parts
 #include <pins.h>
+#include <lang.h>
 #include <display.h>
 
 char VERSION[6] = "v0.5b";
@@ -59,6 +60,7 @@ char address_grid_meter[6] = "";
 char address_inverter[6] = "";
 char address_battery[6] = "";
 char address_outside_temperature[6] = "";
+char display_lang[2] = "";
 long unsigned int DISPLAY_REFRESH_INTERVAL; 
 long unsigned int DISPLAY_SCREEN_INTERVAL;
 
@@ -318,6 +320,7 @@ void setup() {
           strcpy(address_inverter, json["address_inverter"]);
           strcpy(address_battery, json["address_battery"]);
           strcpy(address_outside_temperature, json["address_outside_temperature"]);
+          strcpy(display_lang, json["display_language"]);
         } else {
           Serial.println("failed to load json config");
         }
@@ -350,6 +353,7 @@ void setup() {
   WiFiManagerParameter custom_address_inverter("address_inverter", "Address of vebus inverter", address_inverter, 6);
   WiFiManagerParameter custom_address_battery("address_battery", "Address of can battery", address_battery, 6);
   WiFiManagerParameter custom_address_outside_temperature("address_outside_temperature", "Address of outside temperature", address_outside_temperature, 6);
+  WiFiManagerParameter custom_display_lang("display_lang", "Display language en, de", display_lang, 2);
   WiFiManager wm;
 
   wm.setSaveConfigCallback(saveConfigCallback);
@@ -362,6 +366,7 @@ void setup() {
   wm.addParameter(&custom_address_inverter);
   wm.addParameter(&custom_address_battery);
   wm.addParameter(&custom_address_outside_temperature);
+  wm.addParameter(&custom_display_lang);
 
   //Start wifi manager configuration if BUTTON_SETUP is pressed on start-up
   currentButtonSetupState = digitalRead(BUTTON_SETUP);
@@ -387,9 +392,11 @@ void setup() {
   strcpy(address_inverter, custom_address_inverter.getValue());
   strcpy(address_battery, custom_address_battery.getValue());
   strcpy(address_outside_temperature, custom_address_outside_temperature.getValue());
+  strcpy(display_lang, custom_display_lang.getValue());
 
   DISPLAY_REFRESH_INTERVAL = strtol(disp_refresh_interval, NULL, 10);
   DISPLAY_SCREEN_INTERVAL = strtol(disp_screen_interval, NULL, 10);
+  set_display_language(display_lang);
 
   client.setServer(mqtt_server, 1883);
   client.setCallback(callback);
@@ -492,13 +499,13 @@ void loop() {
 		digitalWrite(STATUS_LED, LOW); //Turn Status LED ON again
     lastDispRefreshTime += DISPLAY_REFRESH_INTERVAL;
     if (display_screen == 0) {
-      display_screen_0(pv_v, pv_w, batt_v, pv_i, pv_kwh);
+      display_screen_pv(pv_v, pv_w, batt_v, pv_i, pv_kwh);
     }
     if (display_screen == 1) {
-      display_screen_1(batt_v, batt_i, batt_p, batt_soc, batt_c_min, batt_c_max);
+      display_screen_battery(batt_v, batt_i, batt_p, batt_soc, batt_c_min, batt_c_max);
     }
     if (display_screen == 2) {
-      display_screen_2(grid_p, inv_p, inv_i, load_ph1, load_ph2, load_ph3, pv_w);
+      display_screen_grid(grid_p, inv_p, inv_i, load_ph1, load_ph2, load_ph3, pv_w);
     }
 	}