LilyGo T5 S3 Epaper Pro No GPS version implementation stage 1 - H752-B; set backlight double click boot to 153 full brightness on, triple click to 40 brightness, double click off

examples/companion_radio/MyMesh.cpp

@@ -4,6 +4,10 @@
 #include <Mesh.h>
 #include "RadioPresets.h"        // Shared radio presets (serial CLI + settings screen)
 
+#if defined(LilyGo_T5S3_EPaper_Pro)
+  #include "target.h"            // for board.setBacklight() CLI command
+#endif
+
 #ifdef HAS_4G_MODEM
   #include "ModemManager.h"      // Serial CLI modem commands
 #endif
@@ -2662,6 +2666,30 @@ void MyMesh::checkCLIRescueCmd() {
           Serial.println("  Error: use 0 (default), 4800, 9600, 19200, 38400, 57600, or 115200");
         }
 
+      // Backlight control (T5S3 E-Paper Pro only)
+      } else if (memcmp(config, "backlight ", 10) == 0) {
+#if defined(LilyGo_T5S3_EPaper_Pro)
+        const char* val = &config[10];
+        if (strcmp(val, "on") == 0) {
+          board.setBacklight(true);
+          Serial.println("  > backlight ON");
+        } else if (strcmp(val, "off") == 0) {
+          board.setBacklight(false);
+          Serial.println("  > backlight OFF");
+        } else {
+          int brightness = atoi(val);
+          if (brightness >= 0 && brightness <= 255) {
+            board.setBacklightBrightness((uint8_t)brightness);
+            board.setBacklight(brightness > 0);
+            Serial.printf("  > backlight brightness = %d\n", brightness);
+          } else {
+            Serial.println("  Error: use 'on', 'off', or 0-255");
+          }
+        }
+#else
+        Serial.println("  Error: backlight not available on this device");
+#endif
+
       } else {
         Serial.printf("  Error: unknown setting '%s' (try 'help')\n", config);
       }
@@ -2707,6 +2735,11 @@ void MyMesh::checkCLIRescueCmd() {
       Serial.println("    erase     Format filesystem");
       Serial.println("    reboot    Restart device");
       Serial.println("    ls / cat / rm   File operations");
+#if defined(LilyGo_T5S3_EPaper_Pro)
+      Serial.println("");
+      Serial.println("  Display:");
+      Serial.println("    set backlight on/off/0-255  Control front-light");
+#endif
 
     // =====================================================================
     // Existing system commands (unchanged)

examples/companion_radio/MyMesh.h

@@ -8,7 +8,7 @@
 #define FIRMWARE_VER_CODE 10
 
 #ifndef FIRMWARE_BUILD_DATE
-#define FIRMWARE_BUILD_DATE "8 March 2026"
+#define FIRMWARE_BUILD_DATE "11 March 2026"
 #endif
 
 #ifndef FIRMWARE_VERSION

examples/companion_radio/main.cpp

@@ -49,10 +49,6 @@
   static bool webReaderNeedsRefresh = false;
   static bool webReaderTextEntry = false;  // True when URL/password entry active
   #endif
-   // AGC reset - periodically re-assert RX boosted gain to prevent sensitivity drift
-  #define AGC_RESET_INTERVAL_MS 500
-  static unsigned long lastAGCReset = 0;
-
   // Emoji picker state
   #include "EmojiPicker.h"
   static bool emojiPickerMode = false;
@@ -90,8 +86,6 @@
     TouchInput touchInput(&Wire);
   #endif
 
-  CPUPowerManager cpuPower;
-  
   void initKeyboard();
   void handleKeyboardInput();
   void drawComposeScreen();
@@ -343,6 +337,11 @@
   }
 #endif
 
+// Board-agnostic: CPU frequency scaling and AGC reset
+CPUPowerManager cpuPower;
+#define AGC_RESET_INTERVAL_MS 500
+static unsigned long lastAGCReset = 0;
+
 // Believe it or not, this std C function is busted on some platforms!
 static uint32_t _atoi(const char* sp) {
   uint32_t n = 0;
@@ -436,7 +435,9 @@ static uint32_t _atoi(const char* sp) {
 /* GLOBAL OBJECTS */
 #ifdef DISPLAY_CLASS
   #include "UITask.h"
-  #include "MapScreen.h"  // After BLE — PNGdec headers conflict with BLE if included earlier
+  #if HAS_GPS
+    #include "MapScreen.h"  // After BLE — PNGdec headers conflict with BLE if included earlier
+  #endif
   UITask ui_task(&board, &serial_interface);
 #endif
 
@@ -749,8 +750,8 @@ void setup() {
     initKeyboard();
   #endif
 
-  // Initialize touch input (CST328)
-  #ifdef HAS_TOUCHSCREEN
+  // Initialize touch input (CST328 on T-Deck Pro)
+  #if defined(LilyGo_TDeck_Pro) && defined(HAS_TOUCHSCREEN)
     if (touchInput.begin(CST328_PIN_INT)) {
       MESH_DEBUG_PRINTLN("setup() - Touch input initialized");
     } else {
@@ -880,6 +881,7 @@ void loop() {
   sensors.loop();
 
   // Map screen: periodically update own GPS position and contact markers
+  #if HAS_GPS
   if (ui_task.isOnMapScreen()) {
     static unsigned long lastMapUpdate = 0;
     if (millis() - lastMapUpdate > 30000) {  // Every 30 seconds
@@ -887,9 +889,7 @@ void loop() {
       MapScreen* ms = (MapScreen*)ui_task.getMapScreen();
       if (ms) {
         // Update own GPS position when GPS is enabled
-        #if HAS_GPS
         ms->updateGPSPosition(sensors.node_lat, sensors.node_lon);
-        #endif
 
         // Always refresh contact markers (new contacts arrive via radio)
         ms->clearMarkers();
@@ -905,12 +905,13 @@ void loop() {
       }
     }
   }
+  #endif
 
   // CPU frequency auto-timeout back to idle
   cpuPower.loop();
 
   // Audiobook: service audio decode regardless of which screen is active
-  #ifndef HAS_4G_MODEM
+  #if defined(LilyGo_TDeck_Pro) && !defined(HAS_4G_MODEM)
   {
     AudiobookPlayerScreen* abPlayer =
       (AudiobookPlayerScreen*)ui_task.getAudiobookScreen();

examples/companion_radio/ui-new/UITask.cpp

@@ -4,7 +4,9 @@
 #include "NotesScreen.h"
 #include "RepeaterAdminScreen.h"
 #include "DiscoveryScreen.h"
-#include "MapScreen.h"
+#if HAS_GPS
+  #include "MapScreen.h"
+#endif
 #include "target.h"
 #if defined(WIFI_SSID) || defined(MECK_WIFI_COMPANION)
   #include <WiFi.h>
@@ -340,7 +342,11 @@ public:
       y += 10;
       display.drawTextCentered(display.width() / 2, y, "[N] Notes       [S] Settings  ");
       y += 10;
+#if HAS_GPS
       display.drawTextCentered(display.width() / 2, y, "[E] Reader      [G] Maps      ");
+#else
+      display.drawTextCentered(display.width() / 2, y, "[E] Reader                    ");
+#endif
       y += 10;
 #if defined(HAS_4G_MODEM) && defined(MECK_WEB_READER)
       display.drawTextCentered(display.width() / 2, y, "[T] Phone       [B] Browser   ");
@@ -359,7 +365,11 @@ public:
 
       // Nav hint
       display.setColor(DisplayDriver::GREEN);
+#if defined(LilyGo_T5S3_EPaper_Pro)
+      display.drawTextCentered(display.width() / 2, y, "Tap screen to cycle home views");
+#else
       display.drawTextCentered(display.width() / 2, y, "Press A/D to cycle home views");
+#endif
       display.setTextSize(1);  // restore
     } else if (_page == HomePage::RECENT) {
       the_mesh.getRecentlyHeard(recent, UI_RECENT_LIST_SIZE);
@@ -952,7 +962,11 @@ void UITask::begin(DisplayDriver* display, SensorManager* sensors, NodePrefs* no
 #ifdef HAS_4G_MODEM
   sms_screen = new SMSScreen(this);
 #endif
+#if HAS_GPS
   map_screen = new MapScreen(this);
+#else
+  map_screen = nullptr;
+#endif
   setCurrScreen(splash);
 }
 
@@ -1362,6 +1376,16 @@ char UITask::handleLongPress(char c) {
 
 char UITask::handleDoubleClick(char c) {
   MESH_DEBUG_PRINTLN("UITask: double click triggered");
+#if defined(LilyGo_T5S3_EPaper_Pro)
+  // Double-click boot button → full brightness backlight toggle
+  if (board.isBacklightOn()) {
+    board.setBacklight(false);
+  } else {
+    board.setBacklightBrightness(153);
+    board.setBacklight(true);
+  }
+  c = 0;  // consume event — don't pass through as navigation
+#endif
   checkDisplayOn(c);
   return c;
 }
@@ -1369,7 +1393,17 @@ char UITask::handleDoubleClick(char c) {
 char UITask::handleTripleClick(char c) {
   MESH_DEBUG_PRINTLN("UITask: triple click triggered");
   checkDisplayOn(c);
+#if defined(LilyGo_T5S3_EPaper_Pro)
+  // Triple-click → half brightness backlight (comfortable reading)
+  if (board.isBacklightOn()) {
+    board.setBacklight(false);  // If already on, turn off
+  } else {
+    board.setBacklightBrightness(80);
+    board.setBacklight(true);
+  }
+#else
   toggleBuzzer();
+#endif
   c = 0;
   return c;
 }
@@ -1643,6 +1677,7 @@ void UITask::gotoWebReader() {
 }
 #endif
 
+#if HAS_GPS
 void UITask::gotoMapScreen() {
   MapScreen* map = (MapScreen*)map_screen;
   if (_display != NULL) {
@@ -1655,6 +1690,7 @@ void UITask::gotoMapScreen() {
   _auto_off = millis() + AUTO_OFF_MILLIS;
   _next_refresh = 100;
 }
+#endif
 
 void UITask::onAdminLoginResult(bool success, uint8_t permissions, uint32_t server_time) {
   if (repeater_admin && isOnRepeaterAdmin()) {

examples/companion_radio/ui-new/UITask.h

@@ -121,7 +121,9 @@ public:
   void gotoAudiobookPlayer(); // Navigate to audiobook player
   void gotoRepeaterAdmin(int contactIdx);  // Navigate to repeater admin
   void gotoDiscoveryScreen();              // Navigate to node discovery scan
+#if HAS_GPS
   void gotoMapScreen();         // Navigate to map tile screen
+#endif
 #ifdef MECK_WEB_READER
   void gotoWebReader();         // Navigate to web reader (browser)
 #endif