Implement Long Turbo preset

src/DisplayFormatters.cpp

@@ -31,6 +31,9 @@ const char *DisplayFormatters::getModemPresetDisplayName(meshtastic_Config_LoRaC
     case meshtastic_Config_LoRaConfig_ModemPreset_LONG_FAST:
         return useShortName ? "LongF" : "LongFast";
         break;
+    case meshtastic_Config_LoRaConfig_ModemPreset_LONG_TURBO:
+        return useShortName ? "LongT" : "LongTurbo";
+        break;
     case meshtastic_Config_LoRaConfig_ModemPreset_LONG_MODERATE:
         return useShortName ? "LongM" : "LongMod";
         break;

src/graphics/draw/MenuHandler.cpp

@@ -20,12 +20,41 @@
 #include "modules/KeyVerificationModule.h"
 
 #include "modules/TraceRouteModule.h"
+#include <algorithm>
+#include <array>
 #include <functional>
+#include <utility>
 
 extern uint16_t TFT_MESH;
 
 namespace graphics
 {
+
+namespace
+{
+
+// Caller must ensure the provided options array outlives the banner callback.
+template <typename T, size_t N, typename Callback>
+BannerOverlayOptions createStaticBannerOptions(const char *message, const MenuOption<T> (&options)[N],
+                                               std::array<const char *, N> &labels, Callback &&onSelection)
+{
+    for (size_t i = 0; i < N; ++i) {
+        labels[i] = options[i].label;
+    }
+
+    const MenuOption<T> *optionsPtr = options;
+    auto callback = std::function<void(const MenuOption<T> &, int)>(std::forward<Callback>(onSelection));
+
+    BannerOverlayOptions bannerOptions;
+    bannerOptions.message = message;
+    bannerOptions.optionsArrayPtr = labels.data();
+    bannerOptions.optionsCount = static_cast<uint8_t>(N);
+    bannerOptions.bannerCallback = [optionsPtr, callback](int selected) -> void { callback(optionsPtr[selected], selected); };
+    return bannerOptions;
+}
+
+} // namespace
+
 menuHandler::screenMenus menuHandler::menuQueue = menu_none;
 bool test_enabled = false;
 uint8_t test_count = 0;
@@ -197,48 +226,38 @@ void menuHandler::DeviceRolePicker()
 
 void menuHandler::RadioPresetPicker()
 {
-    static const char *optionsArray[] = {"Back",       "LongSlow",  "LongModerate", "LongFast",  "MediumSlow",
-                                         "MediumFast", "ShortSlow", "ShortFast",    "ShortTurbo"};
-    enum optionsNumbers {
-        Back = 0,
-        radiopreset_LongSlow = 1,
-        radiopreset_LongModerate = 2,
-        radiopreset_LongFast = 3,
-        radiopreset_MediumSlow = 4,
-        radiopreset_MediumFast = 5,
-        radiopreset_ShortSlow = 6,
-        radiopreset_ShortFast = 7,
-        radiopreset_ShortTurbo = 8
-    };
-    BannerOverlayOptions bannerOptions;
-    bannerOptions.message = "Radio Preset";
-    bannerOptions.optionsArrayPtr = optionsArray;
-    bannerOptions.optionsCount = 9;
-    bannerOptions.bannerCallback = [](int selected) -> void {
-        if (selected == Back) {
-            menuHandler::menuQueue = menuHandler::lora_Menu;
-            screen->runNow();
-            return;
-        } else if (selected == radiopreset_LongSlow) {
-            config.lora.modem_preset = meshtastic_Config_LoRaConfig_ModemPreset_LONG_SLOW;
-        } else if (selected == radiopreset_LongModerate) {
-            config.lora.modem_preset = meshtastic_Config_LoRaConfig_ModemPreset_LONG_MODERATE;
-        } else if (selected == radiopreset_LongFast) {
-            config.lora.modem_preset = meshtastic_Config_LoRaConfig_ModemPreset_LONG_FAST;
-        } else if (selected == radiopreset_MediumSlow) {
-            config.lora.modem_preset = meshtastic_Config_LoRaConfig_ModemPreset_MEDIUM_SLOW;
-        } else if (selected == radiopreset_MediumFast) {
-            config.lora.modem_preset = meshtastic_Config_LoRaConfig_ModemPreset_MEDIUM_FAST;
-        } else if (selected == radiopreset_ShortSlow) {
-            config.lora.modem_preset = meshtastic_Config_LoRaConfig_ModemPreset_SHORT_SLOW;
-        } else if (selected == radiopreset_ShortFast) {
-            config.lora.modem_preset = meshtastic_Config_LoRaConfig_ModemPreset_SHORT_FAST;
-        } else if (selected == radiopreset_ShortTurbo) {
-            config.lora.modem_preset = meshtastic_Config_LoRaConfig_ModemPreset_SHORT_TURBO;
-        }
-        service->reloadConfig(SEGMENT_CONFIG);
-        rebootAtMsec = (millis() + DEFAULT_REBOOT_SECONDS * 1000);
+    static const RadioPresetOption presetOptions[] = {
+        {"Back", OptionsAction::Back},
+        {"LongTurbo", OptionsAction::Select, meshtastic_Config_LoRaConfig_ModemPreset_LONG_TURBO},
+        {"LongModerate", OptionsAction::Select, meshtastic_Config_LoRaConfig_ModemPreset_LONG_MODERATE},
+        {"LongFast", OptionsAction::Select, meshtastic_Config_LoRaConfig_ModemPreset_LONG_FAST},
+        {"MediumSlow", OptionsAction::Select, meshtastic_Config_LoRaConfig_ModemPreset_MEDIUM_SLOW},
+        {"MediumFast", OptionsAction::Select, meshtastic_Config_LoRaConfig_ModemPreset_MEDIUM_FAST},
+        {"ShortSlow", OptionsAction::Select, meshtastic_Config_LoRaConfig_ModemPreset_SHORT_SLOW},
+        {"ShortFast", OptionsAction::Select, meshtastic_Config_LoRaConfig_ModemPreset_SHORT_FAST},
+        {"ShortTurbo", OptionsAction::Select, meshtastic_Config_LoRaConfig_ModemPreset_SHORT_TURBO},
     };
+
+    constexpr size_t presetCount = sizeof(presetOptions) / sizeof(presetOptions[0]);
+    static std::array<const char *, presetCount> presetLabels{};
+
+    auto bannerOptions =
+        createStaticBannerOptions("Radio Preset", presetOptions, presetLabels, [](const RadioPresetOption &option, int) -> void {
+            if (option.action == OptionsAction::Back) {
+                menuHandler::menuQueue = menuHandler::lora_Menu;
+                screen->runNow();
+                return;
+            }
+
+            if (!option.hasValue) {
+                return;
+            }
+
+            config.lora.modem_preset = option.value;
+            service->reloadConfig(SEGMENT_CONFIG);
+            rebootAtMsec = (millis() + DEFAULT_REBOOT_SECONDS * 1000);
+        });
+
     screen->showOverlayBanner(bannerOptions);
 }
 

src/graphics/draw/MenuHandler.h

@@ -99,5 +99,24 @@ class menuHandler
     static void BluetoothToggleMenu();
 };
 
+/* Generic Menu Options designations  */
+enum class OptionsAction { Back, Select };
+
+template <typename T> struct MenuOption {
+    const char *label;
+    OptionsAction action;
+    bool hasValue;
+    T value;
+
+    MenuOption(const char *labelIn, OptionsAction actionIn, T valueIn)
+        : label(labelIn), action(actionIn), hasValue(true), value(valueIn)
+    {
+    }
+
+    MenuOption(const char *labelIn, OptionsAction actionIn) : label(labelIn), action(actionIn), hasValue(false), value() {}
+};
+
+using RadioPresetOption = MenuOption<meshtastic_Config_LoRaConfig_ModemPreset>;
+
 } // namespace graphics
 #endif

src/mesh/RadioInterface.cpp

@@ -503,6 +503,11 @@ void RadioInterface::applyModemConfig()
                 cr = 5;
                 sf = 10;
                 break;
+            case meshtastic_Config_LoRaConfig_ModemPreset_LONG_TURBO:
+                bw = (myRegion->wideLora) ? 1625.0 : 500;
+                cr = 8;
+                sf = 11;
+                break;
             default: // Config_LoRaConfig_ModemPreset_LONG_FAST is default. Gracefully use this is preset is something illegal.
                 bw = (myRegion->wideLora) ? 812.5 : 250;
                 cr = 5;
@@ -539,13 +544,26 @@ void RadioInterface::applyModemConfig()
         }
 
         if ((myRegion->freqEnd - myRegion->freqStart) < bw / 1000) {
-            static const char *err_string = "Regional frequency range is smaller than bandwidth. Fall back to default preset";
-            LOG_ERROR(err_string);
+            const float regionSpanKHz = (myRegion->freqEnd - myRegion->freqStart) * 1000.0f;
+            const float requestedBwKHz = bw;
+            const bool isWideRequest = requestedBwKHz >= 499.5f; // treat as 500 kHz preset
+            const char *presetName =
+                DisplayFormatters::getModemPresetDisplayName(loraConfig.modem_preset, false, loraConfig.use_preset);
+
+            char err_string[160];
+            if (isWideRequest) {
+                snprintf(err_string, sizeof(err_string), "%s region too narrow for 500kHz preset (%s). Falling back to LongFast.",
+                         myRegion->name, presetName);
+            } else {
+                snprintf(err_string, sizeof(err_string), "%s region span %.0fkHz < requested %.0fkHz. Falling back to LongFast.",
+                         myRegion->name, regionSpanKHz, requestedBwKHz);
+            }
+            LOG_ERROR("%s", err_string);
             RECORD_CRITICALERROR(meshtastic_CriticalErrorCode_INVALID_RADIO_SETTING);
 
             meshtastic_ClientNotification *cn = clientNotificationPool.allocZeroed();
             cn->level = meshtastic_LogRecord_Level_ERROR;
-            sprintf(cn->message, err_string);
+            snprintf(cn->message, sizeof(cn->message), "%s", err_string);
             service->sendClientNotification(cn);
 
             // Set to default modem preset

src/mesh/generated/meshtastic/config.pb.h

@@ -293,7 +293,8 @@ typedef enum _meshtastic_Config_LoRaConfig_RegionCode {
 typedef enum _meshtastic_Config_LoRaConfig_ModemPreset {
     /* Long Range - Fast */
     meshtastic_Config_LoRaConfig_ModemPreset_LONG_FAST = 0,
-    /* Long Range - Slow */
+    /* Long Range - Slow
+ Deprecated in 2.7: Unpopular slow preset. */
     meshtastic_Config_LoRaConfig_ModemPreset_LONG_SLOW = 1,
     /* Very Long Range - Slow
  Deprecated in 2.5: Works only with txco and is unusably slow */