Rename isJapanMode() to isAS923_1_JP() for clarity

src/Dispatcher.cpp

@@ -60,7 +60,7 @@ uint32_t Dispatcher::getCADFailRetryDelay() const {
   return 200;
 }
 uint32_t Dispatcher::getCADFailMaxDuration() const {
-  if (_radio->isJapanMode()) return UINT32_MAX;  // ARIB STD-T108: never force TX during LBT
+  if (_radio->isAS923_1_JP()) return UINT32_MAX;  // ARIB STD-T108: never force TX during LBT
   return 4000;   // 4 seconds
 }
 

src/Dispatcher.h

@@ -79,7 +79,7 @@ public:
   virtual float getLastRSSI() const { return 0; }
   virtual float getLastSNR() const { return 0; }
 
-  virtual bool isJapanMode() const { return false; }
+  virtual bool isAS923_1_JP() const { return false; }
 };
 
 /**

src/helpers/radiolib/RadioLibWrappers.cpp

@@ -182,7 +182,7 @@ bool RadioLibWrapper::isSendComplete() {
 void RadioLibWrapper::onSendFinished() {
   _radio->finishTransmit();
   _board->onAfterTransmit();
-  if (isJapanMode()) {
+  if (isAS923_1_JP()) {
     delay(50);  // ARIB STD-T108 §3.4.1: >= 50ms between transmissions
   }
   state = STATE_IDLE;
@@ -193,7 +193,7 @@ int16_t RadioLibWrapper::performChannelScan() {
 }
 
 bool RadioLibWrapper::isChannelActive() {
-  if (isJapanMode()) {
+  if (isAS923_1_JP()) {
     // ARIB STD-T108: 5ms continuous RSSI sensing, -80dBm absolute threshold
     uint32_t sense_start = millis();
     while (millis() - sense_start < 5) {

src/helpers/radiolib/RadioLibWrappers.h

@@ -57,7 +57,7 @@ public:
   virtual uint8_t getCodingRate() const { return 8; }   // default CR4/8, override in subclass
   virtual float getFreqMHz() const { return 0.0f; }     // default unknown, override in subclass
 
-  bool isJapanMode() const override {
+  bool isAS923_1_JP() const override {
     float freq = getFreqMHz();
     return (fabsf(freq - 920.800f) < 0.05f ||
             fabsf(freq - 921.000f) < 0.05f ||
@@ -65,7 +65,7 @@ public:
   }
 
   int getMaxTextLen() const {
-    if (!isJapanMode()) return 10 * 16;  // default 160 bytes
+    if (!isAS923_1_JP()) return 10 * 16;  // default 160 bytes
     uint8_t cr = getCodingRate();
     if (cr <= 5) return 64;  // 3874ms @ SF12/BW125/CR4-5
     if (cr == 6) return 48;  // 3874ms @ SF12/BW125/CR4-6
@@ -74,7 +74,7 @@ public:
   }
 
   int getMaxGroupTextLen() const {
-    if (!isJapanMode()) return 10 * 16;  // default 160 bytes
+    if (!isAS923_1_JP()) return 10 * 16;  // default 160 bytes
     uint8_t cr = getCodingRate();
     if (cr <= 5) return 64;  // 3710ms @ SF12/BW125/CR4-5
     if (cr == 6) return 48;  // 3678ms @ SF12/BW125/CR4-6