diff --git a/code/espurna/config/sensors.h b/code/espurna/config/sensors.h
index acfb7a51..02f0322e 100644
--- a/code/espurna/config/sensors.h
+++ b/code/espurna/config/sensors.h
@@ -590,7 +590,7 @@
 #endif
 
 #ifndef PULSEMETER_PIN
-#define PULSEMETERL_PIN                 5
+#define PULSEMETER_PIN                  5
 #endif
 
 #ifndef PULSEMETER_ENERGY_RATIO
diff --git a/code/espurna/config/types.h b/code/espurna/config/types.h
index 76033026..41d5b74f 100644
--- a/code/espurna/config/types.h
+++ b/code/espurna/config/types.h
@@ -285,6 +285,7 @@
 
 //--------------------------------------------------------------------------------
 // Magnitudes
+// These should remain over time, do not modify their values, only add new ones at the end
 //--------------------------------------------------------------------------------
 
 #define MAGNITUDE_NONE              0
diff --git a/code/espurna/sensors/PulseMeterSensor.h b/code/espurna/sensors/PulseMeterSensor.h
index dc293880..0183392e 100644
--- a/code/espurna/sensors/PulseMeterSensor.h
+++ b/code/espurna/sensors/PulseMeterSensor.h
@@ -80,7 +80,7 @@ class PulseMeterSensor : public BaseSensor {
 
         // Address of the sensor (it could be the GPIO or I2C address)
         String address(unsigned char index) {
-            return String(gpio);
+            return String(_gpio);
         }
 
         // Pre-read hook (usually to populate registers with up-to-date data)
@@ -169,7 +169,7 @@ class PulseMeterSensor : public BaseSensor {
 
 PulseMeterSensor * _pulsemeter_sensor_instance[10] = {NULL};
 
-void ICACHE_RAM_ATTR _pulseMeter_sensor_isr(unsigned char gpio) {
+void ICACHE_RAM_ATTR _pulsemeter_sensor_isr(unsigned char gpio) {
     unsigned char index = gpio > 5 ? gpio-6 : gpio;
     if (_pulsemeter_sensor_instance[index]) {
         _pulsemeter_sensor_instance[index]->handleInterrupt(gpio);