dashboard: draw wifi signal bars

firmware/esp32-s3-dashboard/dashboard_config.h

@@ -1,6 +1,6 @@
 #pragma once
 
-static const char *DASHBOARD_VERSION = "0.1.11-main-ui-pass";
+static const char *DASHBOARD_VERSION = "0.1.12-wifi-bars";
 
 // Update these if your Cargo ESP AP credentials are different.
 static const char *CARGO_WIFI_SSID = "OverlandController";

firmware/esp32-s3-dashboard/esp32-s3-dashboard.ino

@@ -24,6 +24,7 @@ static lv_obj_t *inside_temp_label = nullptr;
 static lv_obj_t *outside_temp_label = nullptr;
 static lv_obj_t *system_status_label = nullptr;
 static lv_obj_t *wifi_icon_label = nullptr;
+static lv_obj_t *wifi_bars_obj[4] = {nullptr};
 static lv_obj_t *cargo_status_dot = nullptr;
 static lv_obj_t *relay_buttons[6] = {nullptr};
 static lv_obj_t *relay_button_labels[6] = {nullptr};
@@ -89,27 +90,27 @@ static String format_hours(float hours)
     return text;
 }
 
-static String wifi_bars()
+static int wifi_bar_count()
 {
     if (WiFi.status() != WL_CONNECTED) {
-        return "□□□□";
+        return 0;
     }
 
     int rssi = WiFi.RSSI();
 
     if (rssi > -60) {
-        return "■■■■";
+        return 4;
     }
 
     if (rssi > -70) {
-        return "■■■□";
+        return 3;
     }
 
     if (rssi > -80) {
-        return "■■□□";
+        return 2;
     }
 
-    return "■□□□";
+    return 1;
 }
 
 static void update_status_icons()
@@ -120,7 +121,19 @@ static void update_status_icons()
 
     lvgl_port_lock(-1);
 
-    lv_label_set_text(wifi_icon_label, wifi_bars().c_str());
+    int bars = wifi_bar_count();
+
+    for (int i = 0; i < 4; i++) {
+        if (wifi_bars_obj[i] == nullptr) {
+            continue;
+        }
+
+        lv_obj_set_style_bg_color(
+            wifi_bars_obj[i],
+            i < bars ? lv_color_hex(0xDDE3EA) : lv_color_hex(0x3A4652),
+            0
+        );
+    }
 
     lv_obj_set_style_bg_color(
         cargo_status_dot,
@@ -830,17 +843,24 @@ static void create_overland_overview_screen()
     }
 
     wifi_icon_label = lv_label_create(system_card);
-    lv_label_set_text(wifi_icon_label, "□□□□");
-    lv_obj_set_style_text_color(wifi_icon_label, lv_color_hex(0xDDE3EA), 0);
-    lv_obj_set_style_text_font(wifi_icon_label, &lv_font_montserrat_30, 0);
-    lv_obj_align(wifi_icon_label, LV_ALIGN_LEFT_MID, 10, 0);
+    lv_label_set_text(wifi_icon_label, "");
+    lv_obj_add_flag(wifi_icon_label, LV_OBJ_FLAG_HIDDEN);
+
+    for (int i = 0; i < 4; i++) {
+        wifi_bars_obj[i] = lv_obj_create(system_card);
+        lv_obj_set_size(wifi_bars_obj[i], 12, 14 + (i * 8));
+        lv_obj_set_style_radius(wifi_bars_obj[i], 2, 0);
+        lv_obj_set_style_border_width(wifi_bars_obj[i], 0, 0);
+        lv_obj_set_style_bg_color(wifi_bars_obj[i], lv_color_hex(0x3A4652), 0);
+        lv_obj_align(wifi_bars_obj[i], LV_ALIGN_LEFT_MID, 12 + (i * 18), 12 - (i * 4));
+    }
 
     cargo_status_dot = lv_obj_create(system_card);
     lv_obj_set_size(cargo_status_dot, 22, 22);
     lv_obj_set_style_radius(cargo_status_dot, LV_RADIUS_CIRCLE, 0);
     lv_obj_set_style_bg_color(cargo_status_dot, lv_color_hex(0xF97066), 0);
     lv_obj_set_style_border_width(cargo_status_dot, 0, 0);
-    lv_obj_align(cargo_status_dot, LV_ALIGN_LEFT_MID, 118, 0);
+    lv_obj_align(cargo_status_dot, LV_ALIGN_LEFT_MID, 100, 0);
 
     system_status_label = lv_label_create(system_card);
     lv_label_set_text(system_status_label, "");