Add 2 Meter (~144mhz) Amateur Radio Regions (#10623)

Default slots:
ITU1_2M: Slot 26 (144.510 MHz)
ITU2_2M: Slot 51 (145.010 MHz)
ITU3_2M: Slot 33 (144.650 MHz)

src/RF95Configuration.h

@@ -1,6 +1,16 @@
 // TODO refactor this out with better radio configuration system
 #ifdef USE_RF95
+
+#ifndef RF95_RESET
 #define RF95_RESET LORA_RESET
-#define RF95_IRQ LORA_DIO0  // on SX1262 version this is a no connect DIO0
+#endif
+
+#ifndef RF95_IRQ
+#define RF95_IRQ LORA_DIO0 // on SX1262 version this is a no connect DIO0
+#endif
+
+#ifndef RF95_DIO1
 #define RF95_DIO1 LORA_DIO1 // Note: not really used for RF95, but used for pure SX127x
 #endif
+
+#endif

src/graphics/draw/MenuHandler.cpp

@@ -206,6 +206,9 @@ void menuHandler::LoraRegionPicker(uint32_t duration)
         {"KZ_863", OptionsAction::Select, meshtastic_Config_LoRaConfig_RegionCode_KZ_863},
         {"NP_865", OptionsAction::Select, meshtastic_Config_LoRaConfig_RegionCode_NP_865},
         {"BR_902", OptionsAction::Select, meshtastic_Config_LoRaConfig_RegionCode_BR_902},
+        {"ITU1_2M (144-146)", OptionsAction::Select, meshtastic_Config_LoRaConfig_RegionCode_ITU1_2M},
+        {"ITU2_2M (144-148)", OptionsAction::Select, meshtastic_Config_LoRaConfig_RegionCode_ITU2_2M},
+        {"ITU3_2M (144-148)", OptionsAction::Select, meshtastic_Config_LoRaConfig_RegionCode_ITU3_2M},
 
     };
 

src/graphics/niche/InkHUD/Applets/System/Menu/MenuAction.h

@@ -66,6 +66,9 @@ enum MenuAction {
     SET_REGION_BR_902,
     SET_REGION_EU_866,
     SET_REGION_NARROW_868,
+    SET_REGION_ITU1_2M,
+    SET_REGION_ITU2_2M,
+    SET_REGION_ITU3_2M,
     // Device Roles
     SET_ROLE_CLIENT,
     SET_ROLE_CLIENT_MUTE,

src/graphics/niche/InkHUD/Applets/System/Menu/MenuApplet.cpp

@@ -784,6 +784,18 @@ void InkHUD::MenuApplet::execute(MenuItem item)
         applyLoRaRegion(meshtastic_Config_LoRaConfig_RegionCode_EU_N_868);
         break;
 
+    case SET_REGION_ITU1_2M:
+        applyLoRaRegion(meshtastic_Config_LoRaConfig_RegionCode_ITU1_2M);
+        break;
+
+    case SET_REGION_ITU2_2M:
+        applyLoRaRegion(meshtastic_Config_LoRaConfig_RegionCode_ITU2_2M);
+        break;
+
+    case SET_REGION_ITU3_2M:
+        applyLoRaRegion(meshtastic_Config_LoRaConfig_RegionCode_ITU3_2M);
+        break;
+
     // Roles
     case SET_ROLE_CLIENT:
         applyDeviceRole(meshtastic_Config_DeviceConfig_Role_CLIENT);
@@ -1485,6 +1497,9 @@ void InkHUD::MenuApplet::showPage(MenuPage page)
         items.push_back(MenuItem("KZ 863", MenuAction::SET_REGION_KZ_863, MenuPage::EXIT));
         items.push_back(MenuItem("NP 865", MenuAction::SET_REGION_NP_865, MenuPage::EXIT));
         items.push_back(MenuItem("BR 902", MenuAction::SET_REGION_BR_902, MenuPage::EXIT));
+        items.push_back(MenuItem("ITU1_2M (144-146)", MenuAction::SET_REGION_ITU1_2M, MenuPage::EXIT));
+        items.push_back(MenuItem("ITU2_2M (144-148)", MenuAction::SET_REGION_ITU2_2M, MenuPage::EXIT));
+        items.push_back(MenuItem("ITU3_2M (144-148)", MenuAction::SET_REGION_ITU3_2M, MenuPage::EXIT));
         items.push_back(MenuItem("Exit", MenuPage::EXIT));
         break;
 

src/mesh/MeshRadio.h

@@ -129,7 +129,7 @@ static inline float bwCodeToKHz(uint16_t bwCode)
     if (bwCode == 10)
         return 10.4f;
     if (bwCode == 16)
-        return 15.625f;
+        return 15.6f;
     if (bwCode == 21)
         return 20.8f;
     if (bwCode == 31)
@@ -241,12 +241,12 @@ static inline void modemPresetToParams(meshtastic_Config_LoRaConfig_ModemPreset
         sf = 8;
         break;
     case PRESET(TINY_FAST):
-        bwKHz = 15.625f;
+        bwKHz = 15.6f;
         cr = 5;
         sf = 7;
         break;
     case PRESET(TINY_SLOW):
-        bwKHz = 15.625f;
+        bwKHz = 15.6f;
         cr = 6;
         sf = 8;
         break;

src/mesh/RadioInterface.cpp

@@ -58,8 +58,8 @@ const RegionProfile PROFILE_EU868 = {PRESETS_EU_868, 0, 0, false, false, 0, 1, 1
 const RegionProfile PROFILE_UNDEF = {PRESETS_UNDEF, 0, 0, true, false, 0, 1, 1};
 const RegionProfile PROFILE_LITE = {PRESETS_LITE, 0.4, 0.0375f, false, false, 0, 10, 10};
 const RegionProfile PROFILE_NARROW = {PRESETS_NARROW, 0, 0.0104f, true, false, 0, 1, 1};
-// Ham '20kHz' profile. 15.625kHz bandwidth coerced to 20kHz via padding.
-const RegionProfile PROFILE_HAM_20KHZ = {PRESETS_TINY, 0, 0.0021875f, false, true, 0, 2, 2};
+// Ham '20kHz' profile. 15.6kHz bandwidth coerced to 20kHz via padding.
+const RegionProfile PROFILE_HAM_20KHZ = {PRESETS_TINY, 0, 0.0022f, false, true, 0, 2, 2};
 
 #define RDEF(name, freq_start, freq_end, duty_cycle, power_limit, frequency_switching, wide_lora, profile_ptr, default_preset,   \
              override_slot)                                                                                                      \
@@ -230,6 +230,35 @@ const RegionInfo regions[] = {
     */
     RDEF(BR_902, 902.0f, 907.5f, 100, 30, false, false, PROFILE_STD, PRESET(LONG_FAST), 0),
 
+    /*
+        ITU Region 1 (Europe, Africa, Middle East, former USSR) amateur 2m allocation: 144.000 - 146.000 MHz.
+        Power limit is the regulatory ceiling (1 W / 30 dBm) — individual hardware will cap below this
+        via its own PA curve; the field here is just the legal upper bound.
+
+        Default slot: 26 (144.510 MHz)
+        https://www.iaru-r1.org/wp-content/uploads/2020/12/VHF-Bandplan.pdf
+    */
+    RDEF(ITU1_2M, 144.0f, 146.0f, 100, 30, false, false, PROFILE_HAM_20KHZ, PRESET(TINY_FAST), 26),
+
+    /*
+        ITU Region 2 (Americas) amateur 2m allocation: 144.000 - 148.000 MHz.
+        Typical admin rules (e.g. US FCC Part 97) allow well above 30 dBm for licensed operators.
+
+        Default slot: 51 (145.010 MHz)
+        https://www.arrl.org/band-plan
+    */
+    RDEF(ITU2_2M, 144.0f, 148.0f, 100, 30, false, false, PROFILE_HAM_20KHZ, PRESET(TINY_FAST), 51),
+
+    /*
+        ITU Region 3 (Asia/Pacific) amateur 2m allocation: 144.000 - 148.000 MHz.
+        Typical admin rules allow well above 30 dBm for licensed operators.
+
+        Default slot: 33 (144.650 MHz)
+        https://www.iaru.org/wp-content/uploads/2020/01/R3-004-IARU-Region-3-Bandplan-rev.2.pdf
+        https://www.wia.org.au/members/bandplans/data/documents/WIA%20Australian%20Band%20Plan%202026.pdf
+    */
+    RDEF(ITU3_2M, 144.0f, 148.0f, 100, 30, false, false, PROFILE_HAM_20KHZ, PRESET(TINY_FAST), 33),
+
     /*
        2.4 GHZ WLAN Band equivalent. Only for SX128x chips.
     */

test/test_radio/test_main.cpp

@@ -35,7 +35,7 @@ static void test_bwCodeToKHz_specialMappings()
 {
     TEST_ASSERT_FLOAT_WITHIN(0.0001f, 7.8f, bwCodeToKHz(8));
     TEST_ASSERT_FLOAT_WITHIN(0.0001f, 10.4f, bwCodeToKHz(10));
-    TEST_ASSERT_FLOAT_WITHIN(0.0001f, 15.625f, bwCodeToKHz(16));
+    TEST_ASSERT_FLOAT_WITHIN(0.0001f, 15.6f, bwCodeToKHz(16));
     TEST_ASSERT_FLOAT_WITHIN(0.0001f, 20.8f, bwCodeToKHz(21));
     TEST_ASSERT_FLOAT_WITHIN(0.0001f, 31.25f, bwCodeToKHz(31));
     TEST_ASSERT_FLOAT_WITHIN(0.0001f, 41.7f, bwCodeToKHz(42));