diff --git a/code/espurna/sensors/BaseSensor.h b/code/espurna/sensors/BaseSensor.h
index f0e18d37..30c069c0 100644
--- a/code/espurna/sensors/BaseSensor.h
+++ b/code/espurna/sensors/BaseSensor.h
@@ -123,20 +123,6 @@ class BaseSensor {
 
         }
 
-        // Interrupt attach callback
-        void attached(unsigned char gpio) {
-            #if SENSOR_DEBUG
-                DEBUG_MSG("[SENSOR] GPIO%d interrupt attached to %s\n", gpio, description().c_str());
-            #endif
-        }
-
-        // Interrupt detach callback
-        void detached(unsigned char gpio) {
-            #if SENSOR_DEBUG
-                DEBUG_MSG("[SENSOR] GPIO%d interrupt detached from %s\n", gpio, description().c_str());
-            #endif
-        }
-
         // Return sensor status (true for ready)
         bool status() { return _error == 0; }
 
@@ -146,16 +132,14 @@ class BaseSensor {
         // Number of available slots
         unsigned char count() { return _count; }
 
-        // Handle interrupt calls
-        void ICACHE_RAM_ATTR handleInterrupt(unsigned char gpio) {}
-
     protected:
 
-        // Attach interrupt
-        void attach(BaseSensor * instance, unsigned char gpio, unsigned char mode);
-
-        // Detach interrupt
-        void detach(unsigned char gpio);
+        // Check if valid GPIO
+        bool _validGPIO(unsigned char gpio) {
+            if (0 <= gpio && gpio <= 5) return true;
+            if (12 <= gpio && gpio <= 15) return true;
+            return false;
+        }
 
         unsigned char _sensor_id = 0x00;
         int _error = 0;
@@ -167,53 +151,3 @@ class BaseSensor {
         unsigned char _address = 0;
 
 };
-
-// -----------------------------------------------------------------------------
-// Interrupt helpers
-// -----------------------------------------------------------------------------
-
-BaseSensor * _isr_sensor_instance[16] = {NULL};
-
-void ICACHE_RAM_ATTR _sensor_isr(unsigned char gpio) {
-    if (_isr_sensor_instance[gpio]) {
-        _isr_sensor_instance[gpio]->handleInterrupt(gpio);
-    }
-}
-
-void ICACHE_RAM_ATTR _sensor_isr_0() { _sensor_isr(0); }
-void ICACHE_RAM_ATTR _sensor_isr_1() { _sensor_isr(1); }
-void ICACHE_RAM_ATTR _sensor_isr_2() { _sensor_isr(2); }
-void ICACHE_RAM_ATTR _sensor_isr_3() { _sensor_isr(3); }
-void ICACHE_RAM_ATTR _sensor_isr_4() { _sensor_isr(4); }
-void ICACHE_RAM_ATTR _sensor_isr_5() { _sensor_isr(5); }
-void ICACHE_RAM_ATTR _sensor_isr_12() { _sensor_isr(12); }
-void ICACHE_RAM_ATTR _sensor_isr_13() { _sensor_isr(13); }
-void ICACHE_RAM_ATTR _sensor_isr_14() { _sensor_isr(14); }
-void ICACHE_RAM_ATTR _sensor_isr_15() { _sensor_isr(15); }
-
-static void (*_sensor_isrs[16])() = {
-    _sensor_isr_0, _sensor_isr_1, _sensor_isr_2, _sensor_isr_3, _sensor_isr_4, _sensor_isr_5,
-    NULL, NULL, NULL, NULL, NULL, NULL,
-    _sensor_isr_12, _sensor_isr_13, _sensor_isr_14, _sensor_isr_15
-};
-
-void BaseSensor::attach(BaseSensor * instance, unsigned char gpio, unsigned char mode) {
-    if ((6 <= gpio) && (gpio <=11)) return;
-    if (gpio >= 16) return;
-    detach(gpio);
-    if (_sensor_isrs[gpio]) {
-        _isr_sensor_instance[gpio] = instance;
-        attachInterrupt(gpio, _sensor_isrs[gpio], mode);
-        instance->attached(gpio);
-    }
-}
-
-void BaseSensor::detach(unsigned char gpio) {
-    if ((6 <= gpio) && (gpio <=11)) return;
-    if (gpio >= 16) return;
-    if (_isr_sensor_instance[gpio]) {
-        detachInterrupt(gpio);
-        _isr_sensor_instance[gpio]->detached(gpio);
-        _isr_sensor_instance[gpio] = NULL;
-    }
-}
diff --git a/code/espurna/sensors/ECH1560Sensor.h b/code/espurna/sensors/ECH1560Sensor.h
index bb13bfac..63403069 100644
--- a/code/espurna/sensors/ECH1560Sensor.h
+++ b/code/espurna/sensors/ECH1560Sensor.h
@@ -22,7 +22,7 @@ class ECH1560Sensor : public BaseSensor {
         }
 
         ~ECH1560Sensor() {
-            if (_interrupt_gpio != GPIO_NONE) detach(_interrupt_gpio);
+            _enableInterrupts(false);
         }
 
         // ---------------------------------------------------------------------
@@ -69,27 +69,10 @@ class ECH1560Sensor : public BaseSensor {
 
             pinMode(_clk, INPUT);
             pinMode(_miso, INPUT);
-            if (_interrupt_gpio != GPIO_NONE) detach(_interrupt_gpio);
-            attach(this, _clk, RISING);
+            _enableInterrupts(true);
 
         }
 
-        // Interrupt attach callback
-        void attached(unsigned char gpio) {
-            BaseSensor::attached(gpio);
-            _interrupt_gpio = gpio;
-        }
-
-        // Interrupt detach callback
-        void detached(unsigned char gpio) {
-            BaseSensor::detached(gpio);
-            if (_interrupt_gpio == gpio) _interrupt_gpio = GPIO_NONE;
-        }
-
-        void ICACHE_RAM_ATTR handleInterrupt() {
-            _isr();
-        }
-
         // Descriptive name of the sensor
         String description() {
             char buffer[25];
@@ -117,13 +100,9 @@ class ECH1560Sensor : public BaseSensor {
             return 0;
         }
 
-    protected:
+        void ICACHE_RAM_ATTR handleInterrupt(unsigned char gpio) {
 
-        // ---------------------------------------------------------------------
-        // Protected
-        // ---------------------------------------------------------------------
-
-        void ICACHE_RAM_ATTR _isr() {
+            (void) gpio;
 
             // if we are trying to find the sync-time (CLK goes high for 1-2ms)
             if (_dosync == false) {
@@ -152,6 +131,36 @@ class ECH1560Sensor : public BaseSensor {
 
         }
 
+    protected:
+
+        // ---------------------------------------------------------------------
+        // Interrupt management
+        // ---------------------------------------------------------------------
+
+        void _attach(ECH1560Sensor * instance, unsigned char gpio, unsigned char mode);
+        void _detach(unsigned char gpio);
+
+        void _enableInterrupts(bool value) {
+
+            static unsigned char _interrupt_clk = GPIO_NONE;
+
+            if (value) {
+                if (_interrupt_clk != _clk) {
+                    if (_interrupt_clk != GPIO_NONE) _detach(_interrupt_clk);
+                    _attach(this, _clk, RISING);
+                    _interrupt_clk = _clk;
+                }
+            } else if (_interrupt_clk != GPIO_NONE) {
+                _detach(_interrupt_clk);
+                _interrupt_clk = GPIO_NONE;
+            }
+
+        }
+
+        // ---------------------------------------------------------------------
+        // Protected
+        // ---------------------------------------------------------------------
+
         void _sync() {
 
             unsigned int byte1 = 0;
@@ -247,7 +256,6 @@ class ECH1560Sensor : public BaseSensor {
 
         unsigned char _clk = 0;
         unsigned char _miso = 0;
-        unsigned char _interrupt_gpio = GPIO_NONE;
         bool _inverted = false;
 
         volatile long _bits_count = 0;
@@ -262,3 +270,57 @@ class ECH1560Sensor : public BaseSensor {
         unsigned char _data[24];
 
 };
+
+// -----------------------------------------------------------------------------
+// Interrupt helpers
+// -----------------------------------------------------------------------------
+
+ECH1560Sensor * _ech1560_sensor_instance[10] = {NULL};
+
+void ICACHE_RAM_ATTR _ech1560_sensor_isr(unsigned char gpio) {
+    unsigned char index = gpio > 5 ? gpio-6 : gpio;
+    if (_ech1560_sensor_instance[index]) {
+        _ech1560_sensor_instance[index]->handleInterrupt(gpio);
+    }
+}
+
+void ICACHE_RAM_ATTR _ech1560_sensor_isr_0() { _ech1560_sensor_isr(0); }
+void ICACHE_RAM_ATTR _ech1560_sensor_isr_1() { _ech1560_sensor_isr(1); }
+void ICACHE_RAM_ATTR _ech1560_sensor_isr_2() { _ech1560_sensor_isr(2); }
+void ICACHE_RAM_ATTR _ech1560_sensor_isr_3() { _ech1560_sensor_isr(3); }
+void ICACHE_RAM_ATTR _ech1560_sensor_isr_4() { _ech1560_sensor_isr(4); }
+void ICACHE_RAM_ATTR _ech1560_sensor_isr_5() { _ech1560_sensor_isr(5); }
+void ICACHE_RAM_ATTR _ech1560_sensor_isr_12() { _ech1560_sensor_isr(12); }
+void ICACHE_RAM_ATTR _ech1560_sensor_isr_13() { _ech1560_sensor_isr(13); }
+void ICACHE_RAM_ATTR _ech1560_sensor_isr_14() { _ech1560_sensor_isr(14); }
+void ICACHE_RAM_ATTR _ech1560_sensor_isr_15() { _ech1560_sensor_isr(15); }
+
+static void (*_ech1560_sensor_isr_list[10])() = {
+    _ech1560_sensor_isr_0, _ech1560_sensor_isr_1, _ech1560_sensor_isr_2,
+    _ech1560_sensor_isr_3, _ech1560_sensor_isr_4, _ech1560_sensor_isr_5,
+    _ech1560_sensor_isr_12, _ech1560_sensor_isr_13, _ech1560_sensor_isr_14,
+    _ech1560_sensor_isr_15
+};
+
+void ECH1560Sensor::_attach(ECH1560Sensor * instance, unsigned char gpio, unsigned char mode) {
+    if (!_validGPIO(gpio)) return;
+    _detach(gpio);
+    unsigned char index = gpio > 5 ? gpio-6 : gpio;
+    _ech1560_sensor_instance[index] = instance;
+    attachInterrupt(gpio, _ech1560_sensor_isr_list[index], mode);
+    #if SENSOR_DEBUG
+        DEBUG_MSG("[SENSOR] GPIO%d interrupt attached to %s\n", gpio, instance->description().c_str());
+    #endif
+}
+
+void ECH1560Sensor::_detach(unsigned char gpio) {
+    if (!_validGPIO(gpio)) return;
+    unsigned char index = gpio > 5 ? gpio-6 : gpio;
+    if (_ech1560_sensor_instance[index]) {
+        detachInterrupt(gpio);
+        #if SENSOR_DEBUG
+            DEBUG_MSG("[SENSOR] GPIO%d interrupt detached from %s\n", gpio, _ech1560_sensor_instance[index]->description().c_str());
+        #endif
+        _ech1560_sensor_instance[index] = NULL;
+    }
+}
diff --git a/code/espurna/sensors/EventSensor.h b/code/espurna/sensors/EventSensor.h
index 9db786ba..c14f92f9 100644
--- a/code/espurna/sensors/EventSensor.h
+++ b/code/espurna/sensors/EventSensor.h
@@ -22,7 +22,7 @@ class EventSensor : public BaseSensor {
         }
 
         ~EventSensor() {
-            detach(_gpio);
+            _enableInterrupts(false);
         }
 
         // ---------------------------------------------------------------------
@@ -68,9 +68,8 @@ class EventSensor : public BaseSensor {
         // Initialization method, must be idempotent
         // Defined outside the class body
         void begin() {
-            if (_interrupt_gpio != GPIO_NONE) detach(_interrupt_gpio);
             pinMode(_gpio, _mode);
-            attach(this, _gpio, _interrupt_mode);
+            _enableInterrupts(true);
         }
 
         // Descriptive name of the sensor
@@ -101,7 +100,7 @@ class EventSensor : public BaseSensor {
         }
 
         // Handle interrupt calls
-        void ICACHE_RAM_ATTR handleInterrupt(unsigned char gpio) {
+        void handleInterrupt(unsigned char gpio) {
             (void) gpio;
             static unsigned long last = 0;
             if (millis() - last > _debounce) {
@@ -110,19 +109,29 @@ class EventSensor : public BaseSensor {
             }
         }
 
-        // Interrupt attach callback
-        void attached(unsigned char gpio) {
-            BaseSensor::attached(gpio);
-            _interrupt_gpio = gpio;
-        }
+    protected:
 
-        // Interrupt detach callback
-        void detached(unsigned char gpio) {
-            BaseSensor::detached(gpio);
-            if (_interrupt_gpio == gpio) _interrupt_gpio = GPIO_NONE;
-        }
+        // ---------------------------------------------------------------------
+        // Interrupt management
+        // ---------------------------------------------------------------------
 
-    protected:
+        void _attach(EventSensor * instance, unsigned char gpio, unsigned char mode);
+        void _detach(unsigned char gpio);
+
+        void _enableInterrupts(bool value) {
+
+            static unsigned char _interrupt_gpio = GPIO_NONE;
+
+            if (value) {
+                if (_interrupt_gpio != GPIO_NONE) _detach(_interrupt_gpio);
+                _attach(this, _gpio, _interrupt_mode);
+                _interrupt_gpio = _gpio;
+            } else if (_interrupt_gpio != GPIO_NONE) {
+                _detach(_interrupt_gpio);
+                _interrupt_gpio = GPIO_NONE;
+            }
+
+        }
 
         // ---------------------------------------------------------------------
         // Protected
@@ -133,6 +142,59 @@ class EventSensor : public BaseSensor {
         unsigned char _gpio;
         unsigned char _mode;
         unsigned char _interrupt_mode;
-        unsigned char _interrupt_gpio = GPIO_NONE;
 
 };
+
+// -----------------------------------------------------------------------------
+// Interrupt helpers
+// -----------------------------------------------------------------------------
+
+EventSensor * _event_sensor_instance[10] = {NULL};
+
+void ICACHE_RAM_ATTR _event_sensor_isr(unsigned char gpio) {
+    unsigned char index = gpio > 5 ? gpio-6 : gpio;
+    if (_event_sensor_instance[index]) {
+        _event_sensor_instance[index]->handleInterrupt(gpio);
+    }
+}
+
+void ICACHE_RAM_ATTR _event_sensor_isr_0() { _event_sensor_isr(0); }
+void ICACHE_RAM_ATTR _event_sensor_isr_1() { _event_sensor_isr(1); }
+void ICACHE_RAM_ATTR _event_sensor_isr_2() { _event_sensor_isr(2); }
+void ICACHE_RAM_ATTR _event_sensor_isr_3() { _event_sensor_isr(3); }
+void ICACHE_RAM_ATTR _event_sensor_isr_4() { _event_sensor_isr(4); }
+void ICACHE_RAM_ATTR _event_sensor_isr_5() { _event_sensor_isr(5); }
+void ICACHE_RAM_ATTR _event_sensor_isr_12() { _event_sensor_isr(12); }
+void ICACHE_RAM_ATTR _event_sensor_isr_13() { _event_sensor_isr(13); }
+void ICACHE_RAM_ATTR _event_sensor_isr_14() { _event_sensor_isr(14); }
+void ICACHE_RAM_ATTR _event_sensor_isr_15() { _event_sensor_isr(15); }
+
+static void (*_event_sensor_isr_list[10])() = {
+    _event_sensor_isr_0, _event_sensor_isr_1, _event_sensor_isr_2,
+    _event_sensor_isr_3, _event_sensor_isr_4, _event_sensor_isr_5,
+    _event_sensor_isr_12, _event_sensor_isr_13, _event_sensor_isr_14,
+    _event_sensor_isr_15
+};
+
+void EventSensor::_attach(EventSensor * instance, unsigned char gpio, unsigned char mode) {
+    if (!_validGPIO(gpio)) return;
+    _detach(gpio);
+    unsigned char index = gpio > 5 ? gpio-6 : gpio;
+    _event_sensor_instance[index] = instance;
+    attachInterrupt(gpio, _event_sensor_isr_list[index], mode);
+    #if SENSOR_DEBUG
+        DEBUG_MSG("[SENSOR] GPIO%d interrupt attached to %s\n", gpio, instance->description().c_str());
+    #endif
+}
+
+void EventSensor::_detach(unsigned char gpio) {
+    if (!_validGPIO(gpio)) return;
+    unsigned char index = gpio > 5 ? gpio-6 : gpio;
+    if (_event_sensor_instance[index]) {
+        detachInterrupt(gpio);
+        #if SENSOR_DEBUG
+            DEBUG_MSG("[SENSOR] GPIO%d interrupt detached from %s\n", gpio, _event_sensor_instance[index]->description().c_str());
+        #endif
+        _event_sensor_instance[index] = NULL;
+    }
+}
diff --git a/code/espurna/sensors/HLW8012Sensor.h b/code/espurna/sensors/HLW8012Sensor.h
index e39c3792..a5c66efe 100644
--- a/code/espurna/sensors/HLW8012Sensor.h
+++ b/code/espurna/sensors/HLW8012Sensor.h
@@ -26,8 +26,7 @@ class HLW8012Sensor : public BaseSensor {
         }
 
         ~HLW8012Sensor() {
-            detach(_interrupt_cf);
-            detach(_interrupt_cf1);
+            _enableInterrupts(false);
         }
 
         void expectedCurrent(double expected) {
@@ -141,13 +140,13 @@ class HLW8012Sensor : public BaseSensor {
 
             // Handle interrupts
             #if HLW8012_USE_INTERRUPTS
-                _enable(true);
+                _enableInterrupts(true);
             #else
                 _onconnect_handler = WiFi.onStationModeGotIP([this](WiFiEventStationModeGotIP ipInfo) {
-                    _enable(true);
+                    _enableInterrupts(true);
                 });
                 _ondisconnect_handler = WiFi.onStationModeDisconnected([this](WiFiEventStationModeDisconnected ipInfo) {
-                    _enable(false);
+                    _enableInterrupts(false);
                 });
             #endif
 
@@ -188,54 +187,55 @@ class HLW8012Sensor : public BaseSensor {
             return 0;
         }
 
+        // Toggle between current and voltage monitoring
+        #if HLW8012_USE_INTERRUPTS == 0
         // Post-read hook (usually to reset things)
-        void post() {
-            // Toggle between current and voltage monitoring
-            #if (HLW8012_USE_INTERRUPTS == 0)
-                _hlw8012->toggleMode();
-            #endif // (HLW8012_USE_INTERRUPTS == 0)
-        }
+        void post() { _hlw8012->toggleMode(); }
+        #endif // HLW8012_USE_INTERRUPTS == 0
 
         // Handle interrupt calls
         void ICACHE_RAM_ATTR handleInterrupt(unsigned char gpio) {
-            if (gpio == _interrupt_cf) _hlw8012->cf_interrupt();
-            if (gpio == _interrupt_cf1) _hlw8012->cf1_interrupt();
-        }
-
-        // Interrupt attach callback
-        void attached(unsigned char gpio) {
-            BaseSensor::attached(gpio);
-            if (_cf == gpio) _interrupt_cf = gpio;
-            if (_cf1 == gpio) _interrupt_cf1 = gpio;
-        }
-
-        // Interrupt detach callback
-        void detached(unsigned char gpio) {
-            BaseSensor::detached(gpio);
-            if (_interrupt_cf == gpio) _interrupt_cf = GPIO_NONE;
-            if (_interrupt_cf1 == gpio) _interrupt_cf1 = GPIO_NONE;
+            if (gpio == _cf) _hlw8012->cf_interrupt();
+            if (gpio == _cf1) _hlw8012->cf1_interrupt();
         }
 
     protected:
 
         // ---------------------------------------------------------------------
-        // Protected
+        // Interrupt management
         // ---------------------------------------------------------------------
 
-        void _enable(bool value) {
+        void _attach(HLW8012Sensor * instance, unsigned char gpio, unsigned char mode);
+        void _detach(unsigned char gpio);
+
+        void _enableInterrupts(bool value) {
+
+            static unsigned char _interrupt_cf = GPIO_NONE;
+            static unsigned char _interrupt_cf1 = GPIO_NONE;
+
             if (value) {
+
                 if (_interrupt_cf != _cf) {
-                    detach(_interrupt_cf);
-                    attach(this, _cf, CHANGE);
+                    if (_interrupt_cf != GPIO_NONE) _detach(_interrupt_cf);
+                    _attach(this, _cf, CHANGE);
+                    _interrupt_cf = _cf;
                 }
+
                 if (_interrupt_cf1 != _cf1) {
-                    detach(_interrupt_cf1);
-                    attach(this, _cf1, CHANGE);
+                    if (_interrupt_cf1 != GPIO_NONE) _detach(_interrupt_cf1);
+                    _attach(this, _cf1, CHANGE);
+                    _interrupt_cf1 = _cf1;
                 }
+
             } else {
-                detach(_interrupt_cf);
-                detach(_interrupt_cf1);
+
+                _detach(_cf);
+                _detach(_cf1);
+                _interrupt_cf = GPIO_NONE;
+                _interrupt_cf1 = GPIO_NONE;
+
             }
+
         }
 
         // ---------------------------------------------------------------------
@@ -247,10 +247,63 @@ class HLW8012Sensor : public BaseSensor {
 
         HLW8012 * _hlw8012 = NULL;
 
-        WiFiEventHandler _onconnect_handler;
-        WiFiEventHandler _ondisconnect_handler;
+        #if HLW8012_USE_INTERRUPTS == 0
+            WiFiEventHandler _onconnect_handler;
+            WiFiEventHandler _ondisconnect_handler;
+        #endif
 
-        unsigned char _interrupt_cf = GPIO_NONE;
-        unsigned char _interrupt_cf1 = GPIO_NONE;
+};
 
+// -----------------------------------------------------------------------------
+// Interrupt helpers
+// -----------------------------------------------------------------------------
+
+HLW8012Sensor * _hlw8012_sensor_instance[10] = {NULL};
+
+void ICACHE_RAM_ATTR _hlw8012_sensor_isr(unsigned char gpio) {
+    unsigned char index = gpio > 5 ? gpio-6 : gpio;
+    if (_hlw8012_sensor_instance[index]) {
+        _hlw8012_sensor_instance[index]->handleInterrupt(gpio);
+    }
+}
+
+void ICACHE_RAM_ATTR _hlw8012_sensor_isr_0() { _hlw8012_sensor_isr(0); }
+void ICACHE_RAM_ATTR _hlw8012_sensor_isr_1() { _hlw8012_sensor_isr(1); }
+void ICACHE_RAM_ATTR _hlw8012_sensor_isr_2() { _hlw8012_sensor_isr(2); }
+void ICACHE_RAM_ATTR _hlw8012_sensor_isr_3() { _hlw8012_sensor_isr(3); }
+void ICACHE_RAM_ATTR _hlw8012_sensor_isr_4() { _hlw8012_sensor_isr(4); }
+void ICACHE_RAM_ATTR _hlw8012_sensor_isr_5() { _hlw8012_sensor_isr(5); }
+void ICACHE_RAM_ATTR _hlw8012_sensor_isr_12() { _hlw8012_sensor_isr(12); }
+void ICACHE_RAM_ATTR _hlw8012_sensor_isr_13() { _hlw8012_sensor_isr(13); }
+void ICACHE_RAM_ATTR _hlw8012_sensor_isr_14() { _hlw8012_sensor_isr(14); }
+void ICACHE_RAM_ATTR _hlw8012_sensor_isr_15() { _hlw8012_sensor_isr(15); }
+
+static void (*_hlw8012_sensor_isr_list[10])() = {
+    _hlw8012_sensor_isr_0, _hlw8012_sensor_isr_1, _hlw8012_sensor_isr_2,
+    _hlw8012_sensor_isr_3, _hlw8012_sensor_isr_4, _hlw8012_sensor_isr_5,
+    _hlw8012_sensor_isr_12, _hlw8012_sensor_isr_13, _hlw8012_sensor_isr_14,
+    _hlw8012_sensor_isr_15
 };
+
+void HLW8012Sensor::_attach(HLW8012Sensor * instance, unsigned char gpio, unsigned char mode) {
+    if (!_validGPIO(gpio)) return;
+    _detach(gpio);
+    unsigned char index = gpio > 5 ? gpio-6 : gpio;
+    _hlw8012_sensor_instance[index] = instance;
+    attachInterrupt(gpio, _hlw8012_sensor_isr_list[index], mode);
+    #if SENSOR_DEBUG
+        DEBUG_MSG("[SENSOR] GPIO%d interrupt attached to %s\n", gpio, instance->description().c_str());
+    #endif
+}
+
+void HLW8012Sensor::_detach(unsigned char gpio) {
+    if (!_validGPIO(gpio)) return;
+    unsigned char index = gpio > 5 ? gpio-6 : gpio;
+    if (_hlw8012_sensor_instance[index]) {
+        detachInterrupt(gpio);
+        #if SENSOR_DEBUG
+            DEBUG_MSG("[SENSOR] GPIO%d interrupt detached from %s\n", gpio, _hlw8012_sensor_instance[index]->description().c_str());
+        #endif
+        _hlw8012_sensor_instance[index] = NULL;
+    }
+}