diff --git a/board/sym-lib-table b/board/sym-lib-table
index 9987325..b8f1854 100644
--- a/board/sym-lib-table
+++ b/board/sym-lib-table
@@ -1,7 +1,8 @@
 (sym_lib_table
-  (lib (name LP38690DT-3.3)(type Legacy)(uri ${KIPRJMOD}/kicad-stuff/LP38690DT-3.3.lib)(options "")(descr ""))
-  (lib (name ESP32-DEVKITC-32D)(type Legacy)(uri ${KIPRJMOD}/kicad-stuff/ESP32/ESP32-DEVKITC-32D.lib)(options "")(descr ""))
-  (lib (name DW01)(type Legacy)(uri ${KIPRJMOD}/kicad-stuff/DW01.lib)(options "")(descr ""))
-  (lib (name SX1308)(type Legacy)(uri ${KIPRJMOD}/kicad-stuff/SX1308.lib)(options "")(descr ""))
-  (lib (name ds2438)(type Legacy)(uri ${KIPRJMOD}/kicad-stuff/ds2438.lib)(options "")(descr ""))
+  (lib (name "LP38690DT-3.3")(type "Legacy")(uri "${KIPRJMOD}/kicad-stuff/LP38690DT-3.3.lib")(options "")(descr ""))
+  (lib (name "ESP32-DEVKITC-32D")(type "Legacy")(uri "${KIPRJMOD}/kicad-stuff/ESP32/ESP32-DEVKITC-32D.lib")(options "")(descr ""))
+  (lib (name "DW01")(type "Legacy")(uri "${KIPRJMOD}/kicad-stuff/DW01.lib")(options "")(descr ""))
+  (lib (name "SX1308")(type "Legacy")(uri "${KIPRJMOD}/kicad-stuff/SX1308.lib")(options "")(descr ""))
+  (lib (name "ds2438")(type "Legacy")(uri "${KIPRJMOD}/kicad-stuff/ds2438.lib")(options "")(descr ""))
+  (lib (name "PlantCtrlESP32-rescue")(type "Legacy")(uri "${KIPRJMOD}/PlantCtrlESP32-rescue.lib")(options "")(descr ""))
 )
diff --git a/esp32/include/ControllerConfiguration.h b/esp32/include/ControllerConfiguration.h
index 3d0ac5e..7379f04 100644
--- a/esp32/include/ControllerConfiguration.h
+++ b/esp32/include/ControllerConfiguration.h
@@ -82,11 +82,7 @@
 /** \addtogroup Configuration
  *  @{
  */
-#define CONFIG_BOOTLOADER_APP_ROLLBACK_ENABLE
-#define CONFIG_COMPILER_CXX_EXCEPTIONS
-
-
-#define FIRMWARE_VERSION "2.4 HW0.10b"
+#define FIRMWARE_VERSION "2.5 HW0.10b"
 
 #define TIMED_LIGHT_PIN CUSTOM1_PIN5
 #define FLOWMETER_PIN CUSTOM1_PIN1
diff --git a/esp32/include/HomieTypes.h b/esp32/include/HomieTypes.h
index f3d5cc9..8f6280f 100644
--- a/esp32/include/HomieTypes.h
+++ b/esp32/include/HomieTypes.h
@@ -21,7 +21,7 @@
 
 #define FOREACH_SENSOR(SENSOR) \
         SENSOR(NONE)   \
-        SENSOR(CAPACITIVE_FREQUENCY)  \
+        SENSOR(FREQUENCY_MOD_RESISTANCE_PROBE)  \
         SENSOR(ANALOG_RESISTANCE_PROBE)   
 
 /**
diff --git a/esp32/include/PlantCtrl.h b/esp32/include/PlantCtrl.h
index ed211e4..701803a 100644
--- a/esp32/include/PlantCtrl.h
+++ b/esp32/include/PlantCtrl.h
@@ -19,7 +19,6 @@
 #include "MathUtils.h"
 #include "MQTTUtils.h"
 #include "LogDefines.h"
-#include "SHT2x.h"
 
 #define ANALOG_REREADS 5
 #define MOISTURE_MEASUREMENT_DURATION 400 /** ms */
@@ -39,7 +38,6 @@ private:
     bool mConnected = false;
     int mPlantId = -1;
     SENSOR_MODE mSensorMode;
-    SHT2x sht20;
 
 
 public:
@@ -128,8 +126,8 @@ public:
         {
         case NONE:
             return DEACTIVATED_PLANT;
-        case CAPACITIVE_FREQUENCY:
-            return mapf(mMoisture_raw.getMedian(), MOIST_SENSOR_MAX_FRQ, MOIST_SENSOR_MIN_FRQ, 0, 100);
+        case FREQUENCY_MOD_RESISTANCE_PROBE:
+            return mapf(mMoisture_raw.getMedian(), MOIST_SENSOR_MIN_FRQ, MOIST_SENSOR_MAX_FRQ, 0, 100);
         case ANALOG_RESISTANCE_PROBE:
             return mapf(mMoisture_raw.getMedian(), ANALOG_SENSOR_MAX_MV, ANALOG_SENSOR_MIN_MV, 0, 100);
         }
@@ -138,7 +136,7 @@ public:
 
     float getCurrentMoistureRaw()
     {
-        if (getSensorMode() == CAPACITIVE_FREQUENCY)
+        if (getSensorMode() == FREQUENCY_MOD_RESISTANCE_PROBE)
         {
             if (mMoisture_raw.getMedian() < MOIST_SENSOR_MIN_FRQ)
             {
diff --git a/esp32/include/ulp-pwm.h b/esp32/include/ulp-pwm.h
index 778d202..66c9cb9 100644
--- a/esp32/include/ulp-pwm.h
+++ b/esp32/include/ulp-pwm.h
@@ -101,17 +101,6 @@ static inline uint16_t ulp_internal_data_read(size_t offset)
     return RTC_SLOW_MEM[offset] & 0xffff;
 }
 
-static inline uint32_t rtc_io_number_get(gpio_num_t gpio_num)
-{
-    assert(rtc_gpio_is_valid_gpio(gpio_num) && "Invalid GPIO for RTC");
-    uint32_t bit = rtc_bit[gpio_num];
-    Serial.print("Resolved GPIO ");
-    Serial.print(gpio_num);
-    Serial.print(" to rtc bit ");
-    Serial.println(bit);
-    return bit;
-}
-
 void ulp_internal_start(void)
 {
     rtc_gpio_init(PIN);
diff --git a/esp32/platformio.ini b/esp32/platformio.ini
index 060c0c3..392e8b2 100644
--- a/esp32/platformio.ini
+++ b/esp32/platformio.ini
@@ -13,23 +13,22 @@ platform = espressif32
 board = esp32doit-devkit-v1
 framework = arduino
 build_flags = -DPIO_FRAMEWORK_ARDUINO_LWIP2_LOW_MEMORY
-    -DPLANT0_SENSORTYPE=ANALOG_RESISTANCE_PROBE
-    -DPLANT1_SENSORTYPE=ANALOG_RESISTANCE_PROBE
-    -DPLANT2_SENSORTYPE=CAPACITIVE_FREQUENCY
-    -DPLANT3_SENSORTYPE=CAPACITIVE_FREQUENCY
-    -DPLANT4_SENSORTYPE=CAPACITIVE_FREQUENCY
-    -DPLANT5_SENSORTYPE=CAPACITIVE_FREQUENCY
-    -DPLANT6_SENSORTYPE=CAPACITIVE_FREQUENCY
+    -DPLANT0_SENSORTYPE=FREQUENCY_MOD_RESISTANCE_PROBE
+    -DPLANT1_SENSORTYPE=FREQUENCY_MOD_RESISTANCE_PROBE
+    -DPLANT2_SENSORTYPE=FREQUENCY_MOD_RESISTANCE_PROBE
+    -DPLANT3_SENSORTYPE=FREQUENCY_MOD_RESISTANCE_PROBE
+    -DPLANT4_SENSORTYPE=FREQUENCY_MOD_RESISTANCE_PROBE
+    -DPLANT5_SENSORTYPE=FREQUENCY_MOD_RESISTANCE_PROBE
+    -DPLANT6_SENSORTYPE=FREQUENCY_MOD_RESISTANCE_PROBE
 board_build.partitions = defaultWithSmallerSpiffs.csv
 
 
 ; the latest development brankitchen-lightch (convention V3.0.x) 
-lib_deps = ArduinoJson@6.16.1
-            OneWire
-            DallasTemperature
-            pololu/VL53L0X
+lib_deps = bblanchon/ArduinoJson@^6.20.1
+            paulstoffregen/OneWire@^2.3.7
+            milesburton/DallasTemperature@^3.11.0
+            pololu/VL53L0X@^1.3.1
             https://github.com/homieiot/homie-esp8266.git#develop
-            robtillaart/SHT2x@^0.1.3
 
 [platformio]
 
diff --git a/esp32/src/PlantCtrl.cpp b/esp32/src/PlantCtrl.cpp
index 72fc01b..2ee3d39 100644
--- a/esp32/src/PlantCtrl.cpp
+++ b/esp32/src/PlantCtrl.cpp
@@ -23,7 +23,6 @@ Plant::Plant(int pinSensor, int pinPump, int plantId, HomieNode *plant, PlantSet
     this->mSetting = setting;
     this->mPlantId = plantId;
     this->mSensorMode = mode;
-    this->sht20 = SHT2x();
 }
 
 void Plant::init(void)
@@ -65,7 +64,7 @@ void Plant::initSensors(void)
 {
     switch (getSensorMode())
     {
-    case CAPACITIVE_FREQUENCY:
+    case FREQUENCY_MOD_RESISTANCE_PROBE:
     {
 
         pcnt_unit_t unit = (pcnt_unit_t)(PCNT_UNIT_0 + this->mPlantId);
@@ -112,7 +111,7 @@ void Plant::blockingMoistureMeasurement(void)
         }
         break;
     }
-    case CAPACITIVE_FREQUENCY:
+    case FREQUENCY_MOD_RESISTANCE_PROBE:
     case NONE:
     {
         // nothing to do here
@@ -125,7 +124,7 @@ void Plant::startMoistureMeasurement(void)
 {
     switch (getSensorMode())
     {
-    case CAPACITIVE_FREQUENCY:
+    case FREQUENCY_MOD_RESISTANCE_PROBE:
     {
         pcnt_unit_t unit = (pcnt_unit_t)(PCNT_UNIT_0 + this->mPlantId);
         pcnt_counter_resume(unit);
@@ -143,7 +142,7 @@ void Plant::stopMoistureMeasurement(void)
 {
     switch (getSensorMode())
     {
-    case CAPACITIVE_FREQUENCY:
+    case FREQUENCY_MOD_RESISTANCE_PROBE:
     {
         int16_t pulses;
         pcnt_unit_t unit = (pcnt_unit_t)(PCNT_UNIT_0 + this->mPlantId);
diff --git a/esp32/src/main.cpp b/esp32/src/main.cpp
index 333146f..4156ede 100644
--- a/esp32/src/main.cpp
+++ b/esp32/src/main.cpp
@@ -315,7 +315,7 @@ void readPowerSwitchedSensors()
     Plant plant = mPlants[i];
     switch (plant.getSensorMode())
     {
-      case CAPACITIVE_FREQUENCY: {
+      case FREQUENCY_MOD_RESISTANCE_PROBE: {
         Serial << "Plant " << i << " measurement: " << mPlants[i].getCurrentMoistureRaw() << " hz " << mPlants[i].getCurrentMoisturePCT() << "%" <<  endl;
         break;
       }