diff --git a/code/espurna/config/sensors.h b/code/espurna/config/sensors.h
index 9a925998..28824ee8 100644
--- a/code/espurna/config/sensors.h
+++ b/code/espurna/config/sensors.h
@@ -7,6 +7,7 @@
 #define SENSOR_READ_INTERVAL                6               // Read data from sensors every 6 seconds
 #define SENSOR_READ_MIN_INTERVAL            6               // Minimum read interval
 #define SENSOR_READ_MAX_INTERVAL            3600            // Maximum read interval
+#define SENSOR_INIT_INTERVAL                10000           // Try to re-init non-ready sensors every 10s
 
 #define SENSOR_REPORT_EVERY                 10              // Report every this many readings
 #define SENSOR_REPORT_MIN_EVERY             1               // Minimum every value
diff --git a/code/espurna/sensor.ino b/code/espurna/sensor.ino
index 38d17995..0da53af3 100644
--- a/code/espurna/sensor.ino
+++ b/code/espurna/sensor.ino
@@ -28,6 +28,7 @@ typedef struct {
 
 std::vector<BaseSensor *> _sensors;
 std::vector<sensor_magnitude_t> _magnitudes;
+bool _sensors_ready = false;
 
 unsigned char _counts[MAGNITUDE_MAX];
 bool _sensor_realtime = API_REAL_TIME_VALUES;
@@ -254,7 +255,7 @@ void _sensorPost() {
 // Sensor initialization
 // -----------------------------------------------------------------------------
 
-void _sensorInit() {
+void _sensorLoad() {
 
     /*
 
@@ -461,15 +462,19 @@ void _sensorInit() {
 }
 
 void _sensorCallback(unsigned char i, unsigned char type, const char * payload) {
-
     DEBUG_MSG_P(PSTR("[SENSOR] Sensor #%u callback, type %u, payload: '%s'\n"), i, type, payload);
-
 }
 
-void _sensorConfigure() {
+void _sensorInit() {
+
+    _sensors_ready = true;
 
     for (unsigned char i=0; i<_sensors.size(); i++) {
 
+        // Do not process and already initialized sensor
+        if (_sensors[i]->ready()) continue;
+        DEBUG_MSG_P(PSTR("[SENSOR] Initializing %s\n"), _sensors[i]->description().c_str());
+
         #if EMON_ANALOG_SUPPORT
 
             if (_sensors[i]->getID() == SENSOR_EMON_ANALOG_ID) {
@@ -499,6 +504,14 @@ void _sensorConfigure() {
 
         // Force sensor to reload config
         _sensors[i]->begin();
+        if (!_sensors[i]->ready()) {
+            if (_sensors[i]->error() != 0) DEBUG_MSG_P(PSTR("[SENSOR]  -> ERROR %d\n"), _sensors[i]->error());
+            _sensors_ready = false;
+            continue;
+        }
+
+        // Initialize magnitudes
+        _magnitudesInit(_sensors[i]);
 
         // Hook callback
         _sensors[i]->onEvent([i](unsigned char type, const char * payload) {
@@ -550,6 +563,44 @@ void _sensorConfigure() {
 
     }
 
+}
+
+void _magnitudesInit(BaseSensor * sensor) {
+
+
+    for (unsigned char k=0; k<sensor->count(); k++) {
+
+        unsigned char type = sensor->type(k);
+
+        sensor_magnitude_t new_magnitude;
+        new_magnitude.sensor = sensor;
+        new_magnitude.local = k;
+        new_magnitude.type = type;
+        new_magnitude.global = _counts[type];
+        new_magnitude.current = 0;
+        new_magnitude.filtered = 0;
+        new_magnitude.reported = 0;
+        new_magnitude.min_change = 0;
+        if (type == MAGNITUDE_DIGITAL) {
+            new_magnitude.filter = new MaxFilter();
+        } else if (type == MAGNITUDE_EVENTS) {
+            new_magnitude.filter = new MovingAverageFilter();
+        } else {
+            new_magnitude.filter = new MedianFilter();
+        }
+        new_magnitude.filter->resize(_sensor_report_every);
+        _magnitudes.push_back(new_magnitude);
+
+        DEBUG_MSG_P(PSTR("[SENSOR]  -> %s:%d\n"), magnitudeTopic(type).c_str(), _counts[type]);
+
+        _counts[type] = _counts[type] + 1;
+
+    }
+
+}
+
+void _sensorConfigure() {
+
     // General sensor settings
     _sensor_read_interval = 1000 * constrain(getSetting("snsRead", SENSOR_READ_INTERVAL).toInt(), SENSOR_READ_MIN_INTERVAL, SENSOR_READ_MAX_INTERVAL);
     _sensor_report_every = constrain(getSetting("snsReport", SENSOR_REPORT_EVERY).toInt(), SENSOR_REPORT_MIN_EVERY, SENSOR_REPORT_MAX_EVERY);
@@ -573,48 +624,6 @@ void _sensorConfigure() {
 
 }
 
-void _magnitudesInit() {
-
-    for (unsigned char i=0; i<_sensors.size(); i++) {
-
-        BaseSensor * sensor = _sensors[i];
-
-        DEBUG_MSG_P(PSTR("[SENSOR] %s\n"), sensor->description().c_str());
-        if (sensor->error() != 0) DEBUG_MSG_P(PSTR("[SENSOR]  -> ERROR %d\n"), sensor->error());
-
-        for (unsigned char k=0; k<sensor->count(); k++) {
-
-            unsigned char type = sensor->type(k);
-
-            sensor_magnitude_t new_magnitude;
-            new_magnitude.sensor = sensor;
-            new_magnitude.local = k;
-            new_magnitude.type = type;
-            new_magnitude.global = _counts[type];
-            new_magnitude.current = 0;
-            new_magnitude.filtered = 0;
-            new_magnitude.reported = 0;
-            new_magnitude.min_change = 0;
-            if (type == MAGNITUDE_DIGITAL) {
-                new_magnitude.filter = new MaxFilter();
-            } else if (type == MAGNITUDE_EVENTS) {
-                new_magnitude.filter = new MovingAverageFilter();
-            } else {
-                new_magnitude.filter = new MedianFilter();
-            }
-            new_magnitude.filter->resize(_sensor_report_every);
-            _magnitudes.push_back(new_magnitude);
-
-            DEBUG_MSG_P(PSTR("[SENSOR]  -> %s:%d\n"), magnitudeTopic(type).c_str(), _counts[type]);
-
-            _counts[type] = _counts[type] + 1;
-
-        }
-
-    }
-
-}
-
 // -----------------------------------------------------------------------------
 // Public
 // -----------------------------------------------------------------------------
@@ -694,14 +703,12 @@ String magnitudeUnits(unsigned char type) {
 void sensorSetup() {
 
     // Load sensors
+    _sensorLoad();
     _sensorInit();
 
     // Configure stored values
     _sensorConfigure();
 
-    // Load magnitudes
-    _magnitudesInit();
-
     #if WEB_SUPPORT
 
         // Websockets
@@ -725,8 +732,14 @@ void sensorSetup() {
 
 void sensorLoop() {
 
-    static unsigned long last_update = 0;
-    static unsigned long report_count = 0;
+    // Check if we still have uninitialized sensors
+    static unsigned long last_init = 0;
+    if (!_sensors_ready) {
+        if (millis() - last_init > SENSOR_INIT_INTERVAL) {
+            last_init = millis();
+            _sensorInit();
+        }
+    }
 
     if (_magnitudes.size() == 0) return;
 
@@ -734,6 +747,8 @@ void sensorLoop() {
     _sensorTick();
 
     // Check if we should read new data
+    static unsigned long last_update = 0;
+    static unsigned long report_count = 0;
     if (millis() - last_update > _sensor_read_interval) {
 
         last_update = millis();
diff --git a/code/espurna/sensors/AnalogSensor.h b/code/espurna/sensors/AnalogSensor.h
index 1502a09c..920538c9 100644
--- a/code/espurna/sensors/AnalogSensor.h
+++ b/code/espurna/sensors/AnalogSensor.h
@@ -30,6 +30,7 @@ class AnalogSensor : public BaseSensor {
         // Initialization method, must be idempotent
         void begin() {
             pinMode(0, INPUT);
+            _ready = true;
         }
 
         // Descriptive name of the sensor
diff --git a/code/espurna/sensors/BH1750Sensor.h b/code/espurna/sensors/BH1750Sensor.h
index c29ab2de..9cc2b87d 100644
--- a/code/espurna/sensors/BH1750Sensor.h
+++ b/code/espurna/sensors/BH1750Sensor.h
@@ -55,7 +55,6 @@ class BH1750Sensor : public I2CSensor {
         void begin() {
 
             if (!_dirty) return;
-            _dirty = false;
 
             // I2C auto-discover
             unsigned char addresses[] = {0x23, 0x5C};
@@ -64,6 +63,8 @@ class BH1750Sensor : public I2CSensor {
 
             // Run configuration on next update
             _run_configure = true;
+            _ready = true;
+            _dirty = false;
 
         }
 
diff --git a/code/espurna/sensors/BMX280Sensor.h b/code/espurna/sensors/BMX280Sensor.h
index 26fe4cac..9782c95e 100644
--- a/code/espurna/sensors/BMX280Sensor.h
+++ b/code/espurna/sensors/BMX280Sensor.h
@@ -67,14 +67,9 @@ class BMX280Sensor : public I2CSensor {
 
         // Initialization method, must be idempotent
         void begin() {
-
             if (!_dirty) return;
-            _dirty = false;
-            _chip = 0;
-
-            // Init
             _init();
-
+            _dirty = !_ready;
         }
 
         // Descriptive name of the sensor
@@ -190,6 +185,9 @@ class BMX280Sensor : public I2CSensor {
             // Make sure sensor had enough time to turn on. BMX280 requires 2ms to start up
             delay(10);
 
+            // No chip ID by default
+            _chip = 0;
+
             // I2C auto-discover
             _address = _begin_i2c(_address, sizeof(BMX280Sensor::addresses), BMX280Sensor::addresses);
             if (_address == 0) return;
@@ -242,6 +240,7 @@ class BMX280Sensor : public I2CSensor {
 
             _measurement_delay = _measurementTime();
             _run_init = false;
+            _ready = true;
 
         }
 
diff --git a/code/espurna/sensors/BaseSensor.h b/code/espurna/sensors/BaseSensor.h
index fdcbe528..12ab5d09 100644
--- a/code/espurna/sensors/BaseSensor.h
+++ b/code/espurna/sensors/BaseSensor.h
@@ -70,8 +70,11 @@ class BaseSensor {
         // Sensor ID
         unsigned char getID() { return _sensor_id; };
 
-        // Return sensor status (true for ready)
-        bool status() { return _error == 0; }
+        // Return status (true if no errors)
+        bool status() { return 0 == _error; }
+
+        // Return ready status (true for ready)
+        bool ready() { return _ready; }
 
         // Return sensor last internal error
         int error() { return _error; }
@@ -89,6 +92,7 @@ class BaseSensor {
         int _error = 0;
         bool _dirty = true;
         unsigned char _count = 0;
+        bool _ready = false;
 
 };
 
diff --git a/code/espurna/sensors/DHTSensor.h b/code/espurna/sensors/DHTSensor.h
index 1cb3f3e1..fe590b84 100644
--- a/code/espurna/sensors/DHTSensor.h
+++ b/code/espurna/sensors/DHTSensor.h
@@ -75,6 +75,7 @@ class DHTSensor : public BaseSensor {
             _previous = _gpio;
 
             _count = 2;
+            _ready = true;
 
         }
 
diff --git a/code/espurna/sensors/DallasSensor.h b/code/espurna/sensors/DallasSensor.h
index 03bf8c8b..e5dbba11 100644
--- a/code/espurna/sensors/DallasSensor.h
+++ b/code/espurna/sensors/DallasSensor.h
@@ -64,7 +64,6 @@ class DallasSensor : public BaseSensor {
         void begin() {
 
             if (!_dirty) return;
-            _dirty = false;
 
             // Manage GPIO lock
             if (_previous != GPIO_NONE) gpioReleaseLock(_previous);
@@ -93,6 +92,8 @@ class DallasSensor : public BaseSensor {
             } else {
                 _previous = _gpio;
             }
+            _ready = true;
+            _dirty = false;
 
         }
 
diff --git a/code/espurna/sensors/DigitalSensor.h b/code/espurna/sensors/DigitalSensor.h
index a0e725ae..fc1ca796 100644
--- a/code/espurna/sensors/DigitalSensor.h
+++ b/code/espurna/sensors/DigitalSensor.h
@@ -58,6 +58,7 @@ class DigitalSensor : public BaseSensor {
         // Initialization method, must be idempotent
         void begin() {
             pinMode(_gpio, _mode);
+            _ready = true;
         }
 
         // Descriptive name of the sensor
diff --git a/code/espurna/sensors/ECH1560Sensor.h b/code/espurna/sensors/ECH1560Sensor.h
index 8ffc07a4..0fc9dc54 100644
--- a/code/espurna/sensors/ECH1560Sensor.h
+++ b/code/espurna/sensors/ECH1560Sensor.h
@@ -67,12 +67,14 @@ class ECH1560Sensor : public BaseSensor {
         void begin() {
 
             if (!_dirty) return;
-            _dirty = false;
 
             pinMode(_clk, INPUT);
             pinMode(_miso, INPUT);
             _enableInterrupts(true);
 
+            _dirty = false;
+            _ready = true;
+
         }
 
         // Loop-like method, call it in your main loop
diff --git a/code/espurna/sensors/EmonADS1X15Sensor.h b/code/espurna/sensors/EmonADS1X15Sensor.h
index 36c9b045..26f18c40 100644
--- a/code/espurna/sensors/EmonADS1X15Sensor.h
+++ b/code/espurna/sensors/EmonADS1X15Sensor.h
@@ -147,7 +147,6 @@ class EmonADS1X15Sensor : public EmonSensor {
         void begin() {
 
             if (!_dirty) return;
-            _dirty = false;
 
             // Discover
             unsigned char addresses[] = {0x48, 0x49, 0x4A, 0x4B};
diff --git a/code/espurna/sensors/EmonSensor.h b/code/espurna/sensors/EmonSensor.h
index e82e7b05..dc2ea7a2 100644
--- a/code/espurna/sensors/EmonSensor.h
+++ b/code/espurna/sensors/EmonSensor.h
@@ -109,6 +109,10 @@ class EmonSensor : public I2CSensor {
                 }
             #endif
 
+            _ready = true;
+            _dirty = false;
+
+
         }
 
     protected:
diff --git a/code/espurna/sensors/EventSensor.h b/code/espurna/sensors/EventSensor.h
index 70288a1f..d46fc063 100644
--- a/code/espurna/sensors/EventSensor.h
+++ b/code/espurna/sensors/EventSensor.h
@@ -72,6 +72,7 @@ class EventSensor : public BaseSensor {
         void begin() {
             pinMode(_gpio, _mode);
             _enableInterrupts(true);
+            _ready = true;
         }
 
         // Descriptive name of the sensor
diff --git a/code/espurna/sensors/HLW8012Sensor.h b/code/espurna/sensors/HLW8012Sensor.h
index 9a43c938..2e030ed1 100644
--- a/code/espurna/sensors/HLW8012Sensor.h
+++ b/code/espurna/sensors/HLW8012Sensor.h
@@ -153,6 +153,8 @@ class HLW8012Sensor : public BaseSensor {
                 });
             #endif
 
+            _ready = true;
+
         }
 
         // Descriptive name of the sensor
diff --git a/code/espurna/sensors/MHZ19Sensor.h b/code/espurna/sensors/MHZ19Sensor.h
index 4826069a..105adf22 100644
--- a/code/espurna/sensors/MHZ19Sensor.h
+++ b/code/espurna/sensors/MHZ19Sensor.h
@@ -72,7 +72,6 @@ class MHZ19Sensor : public BaseSensor {
         void begin() {
 
             if (!_dirty) return;
-            _dirty = false;
 
             if (_serial) delete _serial;
 
@@ -81,6 +80,9 @@ class MHZ19Sensor : public BaseSensor {
             _serial->begin(9600);
             calibrateAuto(false);
 
+            _ready = true;
+            _dirty = false;
+
         }
 
         // Descriptive name of the sensor
diff --git a/code/espurna/sensors/PMSX003Sensor.h b/code/espurna/sensors/PMSX003Sensor.h
index 788a2b06..95e5933a 100644
--- a/code/espurna/sensors/PMSX003Sensor.h
+++ b/code/espurna/sensors/PMSX003Sensor.h
@@ -62,7 +62,6 @@ class PMSX003Sensor : public BaseSensor {
         void begin() {
 
             if (!_dirty) return;
-            _dirty = false;
 
             if (_serial) delete _serial;
             if (_pms) delete _pms;
@@ -74,6 +73,8 @@ class PMSX003Sensor : public BaseSensor {
             _pms->passiveMode();
 
             _startTime = millis();
+            _ready = true;
+            _dirty = false;
 
         }
 
diff --git a/code/espurna/sensors/PZEM004TSensor.h b/code/espurna/sensors/PZEM004TSensor.h
index 9e2cea38..2adc71e9 100644
--- a/code/espurna/sensors/PZEM004TSensor.h
+++ b/code/espurna/sensors/PZEM004TSensor.h
@@ -70,7 +70,6 @@ class PZEM004TSensor : public BaseSensor {
         void begin() {
 
             if (!_dirty) return;
-            _dirty = false;
 
             if (_pzem) delete _pzem;
             if (_serial == NULL) {
@@ -80,6 +79,9 @@ class PZEM004TSensor : public BaseSensor {
             }
             _pzem->setAddress(_ip);
 
+            _ready = true;
+            _dirty = false;
+
         }
 
         // Descriptive name of the sensor
diff --git a/code/espurna/sensors/SHT3XI2CSensor.h b/code/espurna/sensors/SHT3XI2CSensor.h
index ded19529..b3f9e8ca 100644
--- a/code/espurna/sensors/SHT3XI2CSensor.h
+++ b/code/espurna/sensors/SHT3XI2CSensor.h
@@ -31,13 +31,15 @@ class SHT3XI2CSensor : public I2CSensor {
         void begin() {
 
             if (!_dirty) return;
-            _dirty = false;
 
             // I2C auto-discover
             unsigned char addresses[] = {0x45};
             _address = _begin_i2c(_address, sizeof(addresses), addresses);
             if (_address == 0) return;
 
+            _ready = true;
+            _dirty = false;
+
         }
 
         // Descriptive name of the sensor
diff --git a/code/espurna/sensors/SI7021Sensor.h b/code/espurna/sensors/SI7021Sensor.h
index 86192b01..677d8b2d 100644
--- a/code/espurna/sensors/SI7021Sensor.h
+++ b/code/espurna/sensors/SI7021Sensor.h
@@ -41,18 +41,9 @@ class SI7021Sensor : public I2CSensor {
 
         // Initialization method, must be idempotent
         void begin() {
-
             if (!_dirty) return;
-            _dirty = false;
-
-            // I2C auto-discover
-            unsigned char addresses[] = {0x40};
-            _address = _begin_i2c(_address, sizeof(addresses), addresses);
-            if (_address == 0) return;
-
-            // Initialize sensor
             _init();
-
+            _dirty = !_ready;
         }
 
         // Descriptive name of the sensor
@@ -116,6 +107,11 @@ class SI7021Sensor : public I2CSensor {
 
         void _init() {
 
+            // I2C auto-discover
+            unsigned char addresses[] = {0x40};
+            _address = _begin_i2c(_address, sizeof(addresses), addresses);
+            if (_address == 0) return;
+
             // Check device
             i2c_write_uint8(_address, 0xFC, 0xC9);
             _chip = i2c_read_uint8(_address);
@@ -136,6 +132,8 @@ class SI7021Sensor : public I2CSensor {
                 _count = 2;
             }
 
+            _ready = true;
+
         }
 
         unsigned int _read(uint8_t command) {
diff --git a/code/espurna/sensors/V9261FSensor.h b/code/espurna/sensors/V9261FSensor.h
index 31b57b62..c80ab44b 100644
--- a/code/espurna/sensors/V9261FSensor.h
+++ b/code/espurna/sensors/V9261FSensor.h
@@ -61,7 +61,6 @@ class V9261FSensor : public BaseSensor {
         void begin() {
 
             if (!_dirty) return;
-            _dirty = false;
 
             if (_serial) delete _serial;
 
@@ -69,6 +68,9 @@ class V9261FSensor : public BaseSensor {
             _serial->enableIntTx(false);
             _serial->begin(V9261F_BAUDRATE);
 
+            _ready = true;
+            _dirty = false;
+
         }
 
         // Descriptive name of the sensor