VEXT fix for Heltec Wireless Tracker

src/LoRa_APRS_iGate.cpp

@@ -68,7 +68,7 @@ ___________________________________________________________________*/
 #endif
 
 
-String              versionDate             = "2026-10-05";
+String              versionDate             = "2026-10-07";
 String              versionNumber           = "4.0.3";
 Configuration       Config;
 WiFiClient          aprsIsClient;

src/power_utils.cpp

@@ -66,7 +66,7 @@ namespace POWER_Utils {
         }
 
         void vext_ctrl_OFF() {
-            digitalWrite(VEXT_CTRL_PIN, Config.digi.ecoMode == 1 ? VEXT_CTRL_ON_STATE : !VEXT_CTRL_ON_STATE);
+            digitalWrite(VEXT_CTRL_PIN, !VEXT_CTRL_ON_STATE);       // always off, regardless of ecoMode
         }
     #endif
 
@@ -111,9 +111,7 @@ namespace POWER_Utils {
                 PMU.enableALDO3();
             #endif
         #endif
-        #ifdef HELTEC_WIRELESS_TRACKER
-            adc_ctrl_ON();
-        #endif
+        // HELTEC_WIRELESS_TRACKER: GPS shares Vext (GPIO3) with the TFT, so it follows the display power (not controlled here)
         //gpsIsActive = true;
     }
 
@@ -129,9 +127,7 @@ namespace POWER_Utils {
                 PMU.disableALDO3();
             #endif
         #endif
-        #ifdef HELTEC_WIRELESS_TRACKER
-            adc_ctrl_OFF();
-        #endif
+        // HELTEC_WIRELESS_TRACKER: GPS shares Vext with the TFT, turned off with it (see activateGPS)
         //gpsIsActive = false;
     }
 
@@ -199,7 +195,10 @@ namespace POWER_Utils {
                 PMU.setDC1Voltage(3300);
                 PMU.enableDC1();
                 #ifdef TTGO_T_Beam_S3_SUPREME_V3
-                    PMU.setALDO1Voltage(3300);
+                    PMU.setALDO1Voltage(3300);      // BME280, QMC6310, QMI8658, OLED
+                    PMU.enableALDO1();
+                    PMU.setALDO2Voltage(3300);      // sensors/OLED I2C + RTC PCF8563 (must stay on)
+                    PMU.enableALDO2();
                 #endif
                 PMU.setButtonBatteryChargeVoltage(3300);
                 PMU.enableButtonBatteryCharge();

src/utils.cpp

@@ -433,9 +433,10 @@ namespace Utils {
                 displayToggle(false);
             }
             #ifdef VEXT_CTRL_PIN
-                digitalWrite(VEXT_CTRL_PIN, !VEXT_CTRL_ON_STATE);   // VEXT off before deep sleep (always, regardless of ecoMode)
+                POWER_Utils::vext_ctrl_OFF();       // VEXT off before deep sleep (always, regardless of ecoMode)
             #endif
             LoRa_Utils::sleepRadio();
+            POWER_Utils::deactivateGPS();       // GPS rail off (AXP boards), otherwise it keeps draining the low battery while sleeping
             #ifdef RADIO_VCC_PIN
                 digitalWrite(RADIO_VCC_PIN, LOW);   // cut LoRa module power (QRP Labs LightGateway) so it draws nothing while sleeping
             #endif