diff --git a/src/espmega_iot_emon.cpp b/src/espmega_iot_emon.cpp
new file mode 100644
index 0000000..863de9f
--- /dev/null
+++ b/src/espmega_iot_emon.cpp
@@ -0,0 +1,53 @@
+#include "espmega_iot_emon.hpp"
+
+ESPMega_CT::ESPMega_CT(uint8_t analog_pin, float (*adc_to_watts)(uint16_t adc_value), uint32_t fram_address)
+{
+    this->analog_pin = analog_pin;
+    this->fram_address = fram_address;
+    this->adc_to_watts = adc_to_watts;
+}
+
+void ESPMega_CT::begin()
+{
+    this->last_conversion_timestamp = millis();
+    ESPMega_FRAM.read(fram_address, (uint8_t *)&this->energy, 16);
+    this->power = adc_to_watts(ESPMega_analogRead(this->analog_pin));
+}
+
+void ESPMega_CT::loop()
+{
+    this->energy += (millis() - this->last_conversion_timestamp) / 3600000 * this->power;
+    this->power = adc_to_watts(ESPMega_analogRead(this->analog_pin));
+    this->last_conversion_timestamp = millis();
+    ESPMega_FRAM.write(fram_address, (uint8_t *)&this->energy, 16);
+}
+
+void ESPMega_CT::reset_energy()
+{
+    this->energy = 0;
+    ESPMega_FRAM.write16(fram_address, 0);
+}
+
+long double ESPMega_CT::get_energy()
+{
+    return this->energy;
+}
+
+float ESPMega_CT::get_power()
+{
+    return this->power;
+}
+
+float ESPMega_CT::adc_to_watts_builtin(uint16_t adc_value)
+{
+    const float RATIO = 0.1;
+    const float BURDEN_RESISTANCE = 20;
+    const float VOLTAGE = 220;
+    const uint16_t ADC_RANGE_START = 500;
+    const uint16_t ADC_RANGE_END = 16000;
+    const float ADC_RANGE = 12;
+    float burden_voltage = (adc_value - ADC_RANGE_START) / (ADC_RANGE_END - ADC_RANGE_START) * ADC_RANGE;
+    float secondary_current = burden_voltage / BURDEN_RESISTANCE;
+    float primary_current = secondary_current / RATIO;
+    return primary_current * VOLTAGE;
+}
\ No newline at end of file
diff --git a/src/espmega_iot_emon.hpp b/src/espmega_iot_emon.hpp
new file mode 100644
index 0000000..818ce36
--- /dev/null
+++ b/src/espmega_iot_emon.hpp
@@ -0,0 +1,19 @@
+#pragma once
+#include <ESPMegaPRO.h>
+class ESPMega_CT {
+    public:
+        ESPMega_CT(uint8_t analog_pin,float(*adc_to_watts)(uint16_t adc_value), uint32_t fram_address);
+        void begin();
+        void loop();
+        float get_power();
+        long double get_energy();
+        void reset_energy();
+    private:
+        uint8_t analog_pin;
+        uint32_t fram_address;
+        unsigned long last_conversion_timestamp;
+        float power;
+        long double energy;
+        float (*adc_to_watts)(uint16_t adc_value);
+        float adc_to_watts_builtin(uint16_t adc_value);
+};
\ No newline at end of file